COMMON LANGUAGE® General Codes−Telecommunications Service Providers IAC Codes, Exchange Carrier Names, Company Codes− Telcordia and Regions

Telcordia Technologies Practice BR-751-100-112 Issue 4, April 2002

Proprietary — Licensed Material Possession and/or use of this material or any of the COMMON LANGUAGE® Product Codes, Rules, and Information disclosed herein requires a written license agreement and is governed by its terms and conditions. For more information, visit www.commonlanguage.com/ notices.

An SAIC Company BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Copyright Page

COMMON LANGUAGE® General Codes−Telecommunications Service Providers IAC Codes, Exchange Carrier Names, Company Codes−Telcordia and Regions

Prepared for Telcordia Technologies by: Lois Modrell, [email protected] Target audience: Telecommunications Service Providers This document replaces: BR-751-100-112, Issue 3, July 2000 Technical contact: Lois Modrell, [email protected] To obtain copies of this document, contact your company’s document coordinator or your Telcordia account manager, or call 1.800.521.2673 (from the USA and Canada) or +1.732.699.5800 (all others), or visit our Web site at http://www.telcordia.com. Telcordia employees should call 1.732.699.5802.

Copyright © 1997-2002 Telcordia Technologies, Inc. All rights reserved.

Trademark Acknowledgments

Telcordia is a trademark of Telcordia Technologies, Inc. COMMON LANGUAGE is a registered trademark of Telcordia Technologies, Inc.

Proprietary — Licensed Material See proprietary restrictions on title page. ii BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Notice of Disclaimer

Notice of Disclaimer

This document is issued by Telcordia Technologies, Inc. to inform Telcordia customers of the Telcordia practice relating to COMMON LANGUAGE® General Codes—Telecommunications Service Providers IAC Codes, Exchange Carrier Names—Company Codes— Telcordia and Regions. Neither this document nor any of its contents should be disclosed to persons other than employees of the company receiving this document directly from Telcordia. Telcordia reserves the right to revise this document for any reason, including but not limited to, conformity with standards promulgated by various agencies, utilization of advances in the state of the technical arts, or the reflection of changes in the design of any equipment, techniques, or procedures described or referred to herein. TELCORDIA MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, WITH RESPECT TO THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION OR OPINION CONTAINED HEREIN. TELCORDIA EXPRESSLY ADVISES THAT ANY USE OF OR RELIANCE UPON SAID INFORMATION OR OPINION IS AT THE RISK OF THE USER, AND THAT TELCORDIA SHALL NOT BE LIABLE FOR ANY DAMAGE OR INJURY INCURRED BY ANY PERSON ARISING OUT OF THE SUFFICIENCY, ACCURACY, OR UTILITY OF ANY INFORMATION OR OPINION CONTAINED HEREIN. This document does not represent any commitment by Telcordia to purchase any product or service from, nor to provide any product or service to, the receiving company. Nothing contained herein shall be construed as conferring by implication, estoppel or otherwise, any license or right under any patent, whether or not the use of any information herein necessarily employs an invention of any existing or later issued patent. Telcordia does not recommend products, and nothing contained herein is intended as a recommendation of any product to anyone.

Proprietary — Licensed Material See proprietary restrictions on title page. iii BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Notice of Disclaimer

Proprietary — Licensed Material See proprietary restrictions on title page. iv BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Contents

Contents

1. Purpose ...... 1–1 2. Scope ...... 2–1 3. Reason for Issue ...... 3–1 4. General ...... 4–1 5. IAC Codes ...... 5–1 6. Exchange Carrier Name Codes ...... 6–1 7. Company Codes - Telcordia and Regional Holding Companies ...... 7–1 8. IAC Codes Sorted by Company Name ...... 8–1 9. IAC Codes Sorted by Code ...... 9–1 10. Consolidated IAC Codes Sorted by Code ...... 10–1 11. Exchange Carrier Codes Sorted by Company Name ...... 11–1 12. Exchange Carrier Codes Sorted by Company Code ...... 12–1 13. Consolidated EC Codes Sorted by Code ...... 13–1 14. Company Codes - Telcordia and Regional Holding Companies ...... 14–1

Proprietary — Licensed Material See proprietary restrictions on title page. v BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Contents

Proprietary — Licensed Material See proprietary restrictions on title page. vi BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions List of Tables

List of Tables

Table 8-1 IAC Codes Sorted by Company Name ...... 8–1 Table 9-1 IAC Codes Sorted by Code ...... 9–1 Table 10-1 Consolidated IAC Codes Sorted by Code ...... 10–1 Table 11-1 Exchange Carrier Codes Sorted by Company Name ...... 11–1 Table 12-1 Exchange Carrier Codes Sorted by Company Code ...... 12–1 Table 13-1 Consolidated EC Codes Sorted by Code ...... 13–1 Table 14-1 Company Codes - Telcordia and Regional Holding Companies . . 14–1

Proprietary — Licensed Material See proprietary restrictions on title page. vii BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 List of Tables

Proprietary — Licensed Material See proprietary restrictions on title page. viii BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Purpose

1 Purpose This Practice (BR) is a consolidation of the data in three BRs that were discontinued in 1998: • BR 751-100-115, COMMON LANGUAGE® Interexchange Access Customer (IAC) Codes • BR 751-100-110, COMMON LANGUAGE® Exchange Carrier Names • BR 751-100-175, COMMON LANGUAGE® Bellcore and Regional Holding Company Codes. It is important to note that the three code sets continue to remain separate and different from each other. The intent of this document is to put all codes that represent company names in one place for ease of use by the user. This BR contains the standard codes for the representation of Incumbent Local Exchange Carriers, Competitive Local Exchange Carriers, Interexchange Carriers, Resellers, Wireless Services Providers, Enhanced Service Providers, Telecommunications Billing and/or Processing Companies, Competitive Access Providers, Regional Holding Companies and any other type of company that is part of the telecommunications industry.

Proprietary — Licensed Material See proprietary restrictions on title page. 1–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Purpose

Proprietary — Licensed Material See proprietary restrictions on title page. 1–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Scope

2 Scope The codes in this BR are used by the following types of organizations: Network Distribution, Switching Operations, Financial/Comptrollers and Regulatory/ External Affairs. They are particularly applicable to the following operations: Ordering, Circuit Provisioning, Billing and Bill Verification. Two important uses of these codes are interfacing between companies and achieving flow-through. These codes serve as a trigger to get an order moving through the process in most companies.

Proprietary — Licensed Material See proprietary restrictions on title page. 2–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Scope

Proprietary — Licensed Material See proprietary restrictions on title page. 2–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Reason for Issue

3 Reason for Issue This BR is issued to reflect all standard codes in all categories that have been assigned up to the publication date of this document. The COMMON LANGUAGE ® Technical Advisory Group (TAG) has approved some changes/additions to the content and format of this document. No changes have been made to the manner in which codes are assigned nor to the rules governing those assignments. The changes/additions in this issue are: — A white paper on IAC/EC Codes has been prepared and distributed by the Telcordia maintenance agent to address issues surrounding these codes. All of the white paper information has been incorporated into this document in Sections 5 and 6. — The description of CUS in the IAC Code database has been changed FROM: Casual Customer to CABS Billing System TO: Default Value for Casual Customer. Not a Valid IAC Code. — Added ZZZ to the IAC Code database with the following description: Default Value for Casual Customer. Not a Valid IAC Code. — Added 26 codes, ZTA through ZTZ, to the IAC Code database each with the following description: Locally Assigned For Internal Testing Purposes - Invalid IAC Code. — A consolidated code is a code that is no longer to be used and another code will be used instead. Codes are consolidated on request from the company to whom the codes are assigned. This document and the IAC Code database will show as the Company Name value for consolidated codes: Use IAC Code (xxx) The company name and previous company name(s) will be retained in the database and will also be shown in new tables, 10-1 and 13-1, in this document. — New Table 10-1, Consolidated IAC Codes Sorted by Code. The table shows the code that has been consolidated, the reference to the code to use now, and the previous company name(s). — New Table 13-1, Consolidated EC Codes Sorted by Code. The table shows the code that has been consolidated, the reference to the code to use now, and the previous company name(s).

Proprietary — Licensed Material See proprietary restrictions on title page. 3–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Reason for Issue

Proprietary — Licensed Material See proprietary restrictions on title page. 3–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions General

4 General Direct questions concerning this Practice to the General Codes Code Set Subject Matter Expert, COMMON LANGUAGE Products Business Unit. The Telcordia COMMON LANGUAGE Products Business Unit provides the technical expertise to maintain the General Codes Code Set of which these codes are a part. The COMMON LANGUAGE Technical Advisory Group (TAG) contributes to this process in accordance with the procedures outlined in BR 751-000-102, COMMON LANGUAGE® Code Set Request Procedures.

Proprietary — Licensed Material See proprietary restrictions on title page. 4–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 General

Proprietary — Licensed Material See proprietary restrictions on title page. 4–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes

5 IAC Codes A. The IAC codes represent a company name. They identify Incumbent Local Exchange Carriers, Competitive Local Exchange Carriers, Interexchange Carriers, Resellers, Wireless Services Providers, Enhanced Service Providers, Telecommunications Billing and/or Processing Companies, Competitive Access Providers, Regional Holding Companies and any other type of company that is part of the telecommunications industry. Separate codes are not assigned for different functions of a company. If a company falls into more than one of the above categories, the rule is as stated: The code represents a company name and one code per company name is assigned. IAC formerly stood for Interexchange Access Customer. As changes have occurred in the telecommunications industry, the words "Interexchange" and "Access" became confusing to users of these codes. The COMMON LANGUAGE Technical Advisory Group recognized this dilemma and made the decision to refer to these codes as IAC codes. An IAC is a telecommunications or information provider who may be classified as any of the functional entities listed above. The code is not owned by the company to whom it is assigned. The code is part of the national database that serves as a repository for all codes assigned. The code is non-transferrable and cannot be part of a legal agreement to be sold or changed. When changes are needed, contact Telcordia and provide legal documentation from the state to substantiate the request. IAC codes are assigned to these companies by Telcordia as the maintenance agent for ANSI T1.251. The attempt is made to make the codes mnemonic when such a code is available and not already assigned. The IAC code is made up of three alphabetic characters. These codes are used by the following types of organizations: Network Distribution, Switching Operations, Financial/Comptrollers and Regulatory/ External Affairs. They are particularly applicable to the following operations: Ordering, Circuit Provisioning, Billing and Bill Verification. Two important uses of these codes are interfacing between companies and achieving flow-through. These codes serve as a trigger to get an order moving through the process in most companies. When a company places an order with a provider, the IAC code (or ACNA/ CCNA) and the company name on the order are verified against the Telcordia national database. If there is a discrepancy, the provider will refer the company to Telcordia to follow procedures to update the database. Codes not in the national database are invalid. B. Assignment of new codes

Proprietary — Licensed Material See proprietary restrictions on title page. 5–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes

One code per company is assigned. Separate codes are not assigned for different functions of a company. If a company functions as more than one of the kinds of entities listed above, ONE CODE IS ASSIGNED to the company name, not individual codes to the functions. If it is necessary to define a function of a company, it is done in other ways, e.g., with the use of Field Identifiers on a Service Order. (A given company may be assigned one IAC code as well as one EC code. The requirement for which code is needed is determined by the companies with whom the company does business, i.e., some companies require a three- character code for their processes and some companies require a four-character code.) C. Required documentation Documentation required to substantiate the request for a code or change to a code is legal documentation from the state; generally the office of the Secretary of State. Per ANSI Standard T1.251, the IAC Code identifies a company. As the maintenance agent for the ANSI Standard, Telcordia upholds that definition. To that end, legal documentation is required showing a legal company name to be input into the database. This assures that the information going in is as correct as possible and that all users of the database can be confident about the information Generally the legal document will be called Articles of Incorporation. However, not all companies are incorporated and not all states use the same name for the document. Here is a partial list of some document names that are acceptable as legal documentation: • Amended Certificate of Convenience and Necessity • Articles of Amendment • Articles of Amendment to Articles of Incorporation • Articles of Conversion • Articles of Incorporation • Articles of Merger • Articles of Merger, Consolidation or Exchange • Articles of Organization • Articles of Organization Limited Liability Co • Certificate of Amendment to Certificate of Incorporation • Certificate of Assumed Name • Certificate of Assumed or Trade Name • Certificate of Convenience and Necessity

Proprietary — Licensed Material See proprietary restrictions on title page. 5–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes

• Certificate of Existence • Certificate of Existence with Status in Good Standing • Certificate of Formation • Certificate of Formation • Certificate of Good Standing • Certificate of Incorporation • Certificate of Merger • Certificate of Public Convenience and Necessity • Certification of Fictitious Business Name • Certified Fictitious Business Name Statement • Registration of Fictitious Name • Restated Articles of Incorporation with Amendments Forms S-1 or 10K filed with Securities and Exchange Commission will very often be helpful in identifying subsidiaries. D. Name Changes To effect a name change for a particular IAC code, Telcordia must be provided with legal documentation from a state government showing that the company name has changed from what is shown in the database to what the client desires to have shown. Documentation that does not specifically state a name change is not acceptable for a change to a company name in the national database. Company name changes are requested when: — a company changes its name — a company purchases (or otherwise acquires) another company and the name of the "old" company changes to that of the purchasing company. There may not be a direct, one-step link from the database name to what is desired because interim name changes may not have been provided to Telcordia. In this case, legal documentation that shows the links from the database name to what is desired is acceptable. For example: Database Name = Company A / Desired Name = Company D Documentation that depicts Company A to Company B to Company C to Company D is acceptable to change the name from Company A to Company D. In some cases, for a variety of reasons, legal documentation of a name change is not available. Some of these reasons are: — the company name did not actually change — the "new" company bought assets, not the whole company

Proprietary — Licensed Material See proprietary restrictions on title page. 5–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes

— the purchase occurred, but for business reasons, the name of the company will not be changed — documentation cannot be found. In these cases the company name associated with the company name in the database for the code will not be changed. That code and its name will remain as is. To do business (account information, provisioning, billing, etc) with a provider, the company which made the purchase will contact the provider and negotiate for changes in account information for th code (the one where the name cannot be changed) to the purchasing company's own code. This negotiation will include, but not be limited to, the purchasing company showing the provider that the purchase was made, a list of the billable items that are now part of the purchasing company and the code that they are now a part of. The provider will then effect the changes in their systems. The negotiation with the provider is NOT to change the name associated with the code that cannot be changed, but to change the code on the appropriate billable items to the purchasing company's code. Only Telcordia can make a name change for a code after review of the supporting legal state documentation. The code that cannot be changed will not be used on any records that are identified as the purchasing company and it stays in the national database with its original meaning. The reason for this is that legal state documentation supporting a name change has not been provided. The difference in the requirements for the Telcordia national database and doing business with a provider goes back to the definition of the code. The code represents the legal company name and legal documentation from a state is required to substantiate it. The provider needs to know that a purchase of another company (total or partial) occurred and what billing items need to now be associated with the purchasing company. Example: Database before change: ABC Alpha Beta Cellular. With legal documentation of a name change, the database will show: ABC New Company Name (Prev Alpha Beta Cellular). Without legal documentation of a name change, the database will show: ABC Alpha Beta Cellular (same as it was to start with). It is not a problem to have an item in the database for a company that "no longer exists". If it truly no longer exists, that code will never be used. If part of the company still exists under that name, the code will validly be used by that company. The standard does not allow for database deletions, because if

Proprietary — Licensed Material See proprietary restrictions on title page. 5–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes

deleted, codes would be available for assignment and if some instances of the "old" code still exist in some database somewhere, incorrect billing could occur. If a company purchases a company that does not have a code assigned to it, obviously there is nothing to change and the purchased company becomes part of the purchasing company using its IAC code. If a code has been used invalidly, i.e., someone made it up, there is also nothing to change. The purchased company becomes part of the purchasing company using its code. For an acquired company that does not have a code, a new code for that company will not be assigned for the purpose of changing it to the purchasing company. That would be a waste of a code and is not necessary. The purchased company becomes part of the purchasing company using its code.

Abbreviation/Acronym list: ACNA = Access Customer Name Abbreviation ANSI = American National Standards Institute CCNA = Customer Carrier Name Abbreviation EC = Exchange Carrier IAC = (Interexchange Access Customer) Prev = Previously

E. Mergers, acquisitions, buyouts, etc When mergers, acquisitions or buyouts occur, the Telcordia COMMON LANGUAGE® Products Business Unit General Codes Chairperson should be informed so that the code(s) will reflect the way the "new" company is doing business. Telcordia works with each company to determine the best way for the change in structure to be represented, i.e., name change on existing code, referencing several existing codes to now use one overall code etc. To effect a name change for a particular IAC code, Telcordia must be provided with legal documentation from a state government showing that the company name has changed from what is shown in the database to what the client desires to have shown. Documentation that does not specifically state a name change is not acceptable for a change to a company name in the national database. F. Purchase of Assets Generally, when one company purchases the assets of another company, a name change does not occur. The purchasing company is not acquiring the company, only its assets. In many cases, the original company name still exists and that company may remain in business. In addition, more than one company could buy portions of the assets of a particular company. These are more

Proprietary — Licensed Material See proprietary restrictions on title page. 5–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes

reasons to support the requirement of legal documentation to substantiate a company name change. G. Use of codes The EC codes represent a company name. (The EC code is used to populate the CC field.) They do not represent — general partnership, — partial or total asset ownership or — other financial involvement. Separate codes are not assigned to a company for the purpose of internal tracking of different business items. They also do not represent — tax areas — pricing plans — tariffs — functions within the company. None of these examples are appropriate uses of the codes. In all of these cases there are other appropriate ways within the a company's processes to specify these kinds of scenarios, e.g., service order, LSR/ASR (Local Service Request/ Access Service Request), account information, billing, etc. H. Z codes Codes that begin with the letter Z are for local assignment and use and are invalid IAC codes except for 1 real one in the database (ZPC). A company may have internal reasons for wanting to track various items through their processes and these codes can be the vehicle. There may also be reason during a trial or test of a new system or service to use these codes. They could also be used locally for other functions. Each company assigns their own Z codes if they have a need. They keep track of the meaning of the codes within their company. THESE CODES ARE NOT TO BE USED TO INTERFACE WITH OTHER COMPANIES. 26 codes, ZTA through ZTZ, all with the meaning "Locally assigned for internal testing purposes-Invalid IAC code" are in the national database for local company use. Assigning these values helps to streamline a company's processes. I. Invalid IAC codes (ZZZ, CUS, Codes not in D/B) ZZZ and CUS are not IAC Codes or ACNAs, but defaults for a required field in ordering and other processes. For example, they would be used for a customer who orders using the ASR / LSR process but who would never be assigned an

Proprietary — Licensed Material See proprietary restrictions on title page. 5–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes

IAC code. Therefore, ZZZ and CUS should never appear in the EC / IAC field in the CLONES System, Central Location On Line Entry Sytem. NOTE: Both ZZZ and CUS are in the national database showing that they are invalid. They carry the same definition: CUS: Default Value for Casual Customer. Not a Valid IAC Code ZZZ: Default Value for Casual Customer. Not a Valid IAC Code Codes not in the national database are also invalid. IAC codes are listed in Table 8-1 , Table 9-1 and Table 10-1 of this Practice. Table 8-1 is in company name order; Table 9-1 is in IAC code order and Table 10-1 lists all codes that have been consolidated and shows their previous name(s).

Proprietary — Licensed Material See proprietary restrictions on title page. 5–7 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes

Proprietary — Licensed Material See proprietary restrictions on title page. 5–8 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Name Codes

6 Exchange Carrier Name Codes A. The EC codes represent a company name. They identify Incumbent Local Exchange Carriers, Competitive Local Exchange Carriers, Interexchange Carriers, Resellers, Wireless Services Providers, Enhanced Service Providers, Telecommunications Billing and/or Processing Companies, Competitive Access Providers, Regional Holding Companies and any other type of company that is part of the telecommunications industry. Separate codes are not assigned for different functions of a company. If a company falls into more than one of the above categories, the rule is as stated: The code represents a company name and one code per company name is assigned. An Exchange Carrier (EC) is a telecommunications entity that provides dial tone and local exchange switching of telecommunications services and has at least one wire center. Resellers of local exchange service are considered to be Exchange Carriers for coding purposes even though they are not the network provider. The codes are required for these companies to do business with the companies from whom they buy (or lease) numbers, dial tone, facilities, etc. Exchange Carrier Name codes are assigned to these companies by Telcordia as the maintenance agent for ANSI T1.251. The attempt is made to make the codes mnemonic when such a code is available and not already assigned. The code is made up of four alphabetic characters. There are some two- character codes that are standard. These codes belonged to the former Bell System companies and at divestiture of the Bell System the judge allowed the companies to keep those codes to prevent having to change every record in every database. No other two-character codes were ever assigned and none ever will be. One code per company is assigned. Separate codes are not assigned for different functions of a company. If it is necessary to define a function of a company, it is done in other ways, e.g., with the use of Field Identifiers on a Service Order. (A given company may be assigned one Exchange Carrier Name code as well as one IAC code. The requirement for which code is needed is determined by the companies with whom the company does business i.e., some companies require a three-character code for their processes and some companies require a four- character code.) When mergers, acquisitions or buyouts occur, the Telcordia COMMON LANGUAGE Products Business Unit General Codes Chairperson should be informed so that the code(s) will reflect the way the "new" company is doing business. Telcordia works with each company to determine the best way for the change in structure to be represented i.e., name change on existing code, referencing several existing codes to now use one overall code etc. The codes are used by work groups with functions listed in the Scope section.

Proprietary — Licensed Material See proprietary restrictions on title page. 6–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Name Codes

These codes are used by the following types of organizations: Network Distribution, Switching Operations, Financial/Comptrollers and Regulatory/ External Affairs. They are particularly applicable to the following operations: Ordering, Circuit Provisioning, Billing and Bill Verification. Two important uses of these codes are interfacing between companies and achieving flow-through. These codes serve as a trigger to get an order moving through the process in most companies. When a company places an order with a provider, the EC code (or CC) and the company name on the order are verified against the Telcordia national database. If there is a discrepancy, the provider will refer the company to Telcordia to follow procedures to update the database. Codes not in the national database are invalid. B. Assignment of new codes One code per company is assigned. Separate codes are not assigned for different functions of a company. If a company functions as more than one of the kinds of entities listed above, ONE CODE IS ASSIGNED to the company name, not individual codes to the functions. If it is necessary to define a function of a company, it is done in other ways, e.g., with the use of Field Identifiers on a Service Order. (A given company may be assigned one IAC code as well as one EC code. The requirement for which code is needed is determined by the companies with whom the company does business, i.e., some companies require a three- character code for their processes and some companies require a four-character code.) C. Required documentation Documentation required to substantiate the request for a code or change to a code is legal documentation from the state; generally the office of the Secretary of State. Per ANSI Standard T1.251, the EC Code identifies a company. As the maintenance agent for the ANSI Standard, Telcordia upholds that definition. To that end, legal documentation is required showing a legal company name to be input into the database. This assures that the information going in is as correct as possible and that all users of the database can be confident about the information Generally the legal document will be called Articles of Incorporation. However, not all companies are incorporated and not all states use the same name for the document. Here is a partial list of some document names that are acceptable as legal documentation: • Amended Certificate of Convenience and Necessity • Articles of Amendment • Articles of Amendment to Articles of Incorporation

Proprietary — Licensed Material See proprietary restrictions on title page. 6–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Name Codes

• Articles of Conversion • Articles of Incorporation • Articles of Merger • Articles of Merger, Consolidation or Exchange • Articles of Organization • Articles of Organization Limited Liability Co • Certificate of Amendment to Certificate of Incorporation • Certificate of Assumed Name • Certificate of Assumed or Trade Name • Certificate of Convenience and Necessity • Certificate of Existence • Certificate of Existence with Status in Good Standing • Certificate of Formation • Certificate of Formation • Certificate of Good Standing • Certificate of Incorporation • Certificate of Merger • Certificate of Public Convenience and Necessity • Certification of Fictitious Business Name • Certified Fictitious Business Name Statement • Registration of Fictitious Name • Restated Articles of Incorporation with Amendments Forms S-1 or 10K filed with Securities and Exchange Commission will very often be helpful in identifying subsidiaries. D. Name Changes To effect a name change for a particular EC code, Telcordia must be provided with legal documentation from a state government showing that the company name has changed from what is shown in the database to what the client desires to have shown. Documentation that does not specifically state a name change is not acceptable for a change to a company name in the national database. Company name changes are requested when: — a company changes its name

Proprietary — Licensed Material See proprietary restrictions on title page. 6–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Name Codes

— a company purchases (or otherwise acquires) another company and the name of the "old" company changes to that of the purchasing company. There may not be a direct, one-step link from the database name to what is desired because interim name changes may not have been provided to Telcordia. In this case, legal documentation that shows the links from the database name to what is desired is acceptable. For example: Database Name = Company A / Desired Name = Company D Documentation that depicts Company A to Company B to Company C to Company D is acceptable to change the name from Company A to Company D. In some cases, for a variety of reasons, legal documentation of a name change is not available. Some of these reasons are: — the company name did not actually change — the "new" company bought assets, not the whole company — the purchase occurred, but for business reasons, the name of the company will not be changed — documentation cannot be found. In these cases the company name associated with the company name in the database for the code will not be changed. That code and its name will remain as is. To do business (account information, provisioning, billing, etc) with a provider, the company which made the purchase will contact the provider and negotiate for changes in account information for th code (the one where the name cannot be changed) to the purchasing company's own code. This negotiation will include, but not be limited to, the purchasing company showing the provider that the purchase was made, a list of the billable items that are now part of the purchasing company and the code that they are now a part of. The provider will then effect the changes in their systems. The negotiation with the provider is NOT to change the name associated with the code that cannot be changed, but to change the code on the appropriate billable items to the purchasing company's code. Only Telcordia can make a name change for a code after review of the supporting legal state documentation. The code that cannot be changed will not be used on any records that are identified as the purchasing company and it stays in the national database with its original meaning. The reason for this is that legal state documentation supporting a name change has not been provided. The difference in the requirements for the Telcordia national database and doing business with a provider goes back to the definition of the code. The code represents the legal company name and legal documentation from a state is

Proprietary — Licensed Material See proprietary restrictions on title page. 6–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Name Codes

required to substantiate it. The provider needs to know that a purchase of another company (total or partial) occurred and what billing items need to now be associated with the purchasing company. Example: Database before change: ABCD Alpha Beta Communications Co. With legal documentation of a name change, the database will show: ABCD New Company Name (Prev Alpha Beta Communications Co.). Without legal documentation of a name change, the database will show: ABCD Alpha Beta Communications Co. (same as it was to start with). It is not a problem to have an item in the database for a company that "no longer exists". If it truly no longer exists, that code will never be used. If part of the company still exists under that name, the code will validly be used by that company. The standard does not allow for database deletions, because if deleted, codes would be available for assignment and if some instances of the "old" code still exist in some database somewhere, incorrect billing could occur. If a company purchases a company that does not have a code assigned to it, obviously there is nothing to change and the purchased company becomes part of the purchasing company using its EC code. If a code has been used invalidly, i.e., someone made it up, there is also nothing to change. The purchased company becomes part of the purchasing company using its code. For an acquired company that does not have a code, a new code for that company will not be assigned for the purpose of changing it to the purchasing company. That would be a waste of a code and is not necessary. The purchased company becomes part of the purchasing company using its code.

Abbreviation/Acronym list: ACNA = Access Customer Name Abbreviation ANSI = American National Standards Institute CCNA = Customer Carrier Name Abbreviation EC = Exchange Carrier IAC = (Interexchange Access Customer) Prev = Previously

E. Mergers, acquisitions, buyouts, etc When mergers, acquisitions or buyouts occur, the Telcordia COMMON LANGUAGE Products® Business Unit General Codes Chairperson should be informed so that the code(s) will reflect the way the "new" company is doing business. Telcordia works with each company to determine the best way for the

Proprietary — Licensed Material See proprietary restrictions on title page. 6–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Name Codes

change in structure to be represented, i.e., name change on existing code, referencing several existing codes to now use one overall code etc. To effect a name change for a particular EC code, Telcordia must be provided with legal documentation from a state government showing that the company name has changed from what is shown in the database to what the client desires to have shown. Documentation that does not specifically state a name change is not acceptable for a change to a company name in the national database. F. Purchase of Assets Generally,when one company purchases the assets of another company, a name change does not occur. The purchasing company is not acquiring the company, only its assets. In many cases, the original company name still exists and that company may remain in business. In addition, more than one company could buy portions of the assets of a particular company. These are more reasons to support the requirement of legal documentation to substantiate a company name change. G. Use of codes The EC codes represent a company name. (The EC code is used to populate the CC field.) They do not represent — general partnership, — partial or total asset ownership or — other financial involvement. Separate codes are not assigned to a company for the purpose of internal tracking of different business items. They also do not represent — tax areas — pricing plans — tariffs — functions within the company. None of these examples are appropriate uses of the codes. In all of these cases there are other appropriate ways within the a company's processes to specify these kinds of scenarios, e.g., service order, LSR/ASR (Local Service Request/ Access Service Request), account information, billing, etc. Exchange Carrier Name codes are listed in Table 11-1, Table 12-1 and Table 13- 1 of this Practice. Table 11-1 is in company name order; Table 12-1 is in Exchange Carrier Name code order and Table 13-1 lists all codes that have been consolidated and shows their previous name(s).

Proprietary — Licensed Material See proprietary restrictions on title page. 6–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Name Codes

The numeric column onTable 11-1 and Table 12-1 contains the NECA (National Exchange Carrier Association) Company Code assigned to these companies by NECA as maintenance agent for ANSI T1.251. These codes are provided in this document as an aid to the user. NECA is the source of expertise on the numeric codes.

Proprietary — Licensed Material See proprietary restrictions on title page. 6–7 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Name Codes

Proprietary — Licensed Material See proprietary restrictions on title page. 6–8 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Company Codes - Telcordia and Regional Holding Companies

Company Codes - Telcordia and Regional Holding 7 Companies

The company codes for Telcordia and the seven Regional Holding Companies were assigned at divestiture of the Bell System. The codes were kept separate from the Exchange Carrier Name codes because these companies are holding companies of Exchange Carriers. A Regional Holding Company is one of seven business entities that were formed as a result of the breakup of the Bell System. These codes were assigned in 1984 and have not changed. No other codes will be added to this section. The code is made up of two alphabetic characters. Company Codes for Telcordia and the Regional Holding Companies are listed in Table 14-1 of this Practice.

Proprietary — Licensed Material See proprietary restrictions on title page. 7–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Company Codes - Telcordia and Regional Holding Companies

Proprietary — Licensed Material See proprietary restrictions on title page. 7–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

8 IAC Codes Sorted by Company Name Table 8-1 IAC Codes Sorted by Company Name

Company Name Code Headquarters Location @ COMMUNICATIONS, INC. OUA MOREHEAD CITY, NC @LINK NETWORKS, INC. (PREV DAKOTA SERVICES DSI OLYMPIA, WA LIMITED) @MOBILE.COM AJB BELLEVUE, WA 1 COM, INC. OBM PLAINVILLE, MA 101 ON LINE ONL SAN FRANCISCO, CA 101-6555 LONG DISTANCE CORP. (PREV OVERSEAS OSG VANCOUVER, BC GLOBALTEL CORP) 1-800-RECONEX, INC (PREV STERLING INTERNATIONAL SIU HUBBARD, OR FUNDING, INC.) 1STEL, INC. ELX CLEBURNE, TX 2000 PAGING SYSTEMS PIY TOTOWA, NJ 21ST CENTURY WIRELESS GROUP INC EWG WEST MEMPHIS, AR 24/7 COMMUNICATIONS INC. FSD LOS ANGELES, CA 2JT TELECOMMUNICATIONS TJT HENDERSON, TX 2ND CENTURY COMMUNICATIONS, INC TYX TAMPA, FL 3 RIVERS TELEPHONE COOPERATIVE, INC. RVE FAIRFIELD, MT 360NETWORKS INC REN VANCOUVER, BC 3620221 CANADA INC NDA ETOBICOKE, ON 3855651 CANADA INC. NDQ STE MARIE DE BEAUCE, QC 3M CANADA, INC. MAA LONDON, ON 4CONNECTIONS LLC FOE BERNARDSVILLE, NJ 5 STAR PHONE CENTER CORPORATION FSH FRANKFORT, IL 555 INFOTEL DIRECTORY IOL CARSON CITY, NV 555 ON-LINE ONN INCLINE VILLAGE, NV 555-FAX-INFORMATION TELCO FAX PORTLAND, OR 567562 B.C. LTD BCD NEW WESTMINSTER, BC 7-TEL INC SVT PROYER, OK 800 & LONG DISTANCE SERVICES LDV BALTIMORE, MD 800 LINE COMMUNICATIONS ELN 800-777-CLUB, INC. LUB EL MONTE, CA 800SURVEY.COM, INC. URV NEW YORK, NY 90 PUBLIC SQUARE NPS 900 AMERICA LTD NHA AKRON, OH 9107-1365 QUEBEC INC. QUE VALCOURT, PQ 9278 COMMUNICATIONS, INC OIT BRONX, NY 9278 DISTRIBUTOR INC DRB BRONX, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location A & B ELECTRONICS INC AZB ABILENE, TX A & I DISTRIBUTER AIB BILLINGS, MO A & R COMMUNICATIONS AXU GLENDIVE, MT A ALERT PAGING CO OF SAN FRANCISCO ALE RANCHO CORDOVA, CA A B NETWORK ABZ AUSTIN, TX A BEEP,L.L.C. ABY JOLIET, IL A F KIMMEL AFK A K CELLULAR AKL SOUTH BEND, IN A QUALITY COMMUNICATION SERVICES AQL HUDSON, FL A T H COMM ATQ SANTA ANA, CA A V LAUTTAMUS COMMUNICATIONS AVL WEIRTON, WV A&NTELECOM ANJ LOS ANGELES, CA A.R.C. NETWORKS, INC (PREV A.R.C. NETWORKS AWU HAUPPAUGE, NY CORPORATION) A+ NETWORK USA (PREV. NETWORK USA) NUS PENSACOLA, FL AA BEEP AQB FREDRICK, MD AA TELECOM AAQ AUBURN, CA AAA ANSWERING SERVICE AND MEDICAL EXCHANGE AEX AAA ANSWERING SERVICE INC AAS AAA ANSWERING SERVICE INC AAW AAA ANSWERPHONE AAP AAA COMMUNICATIONS, LTD DBA AAA BEEPERS OMA NORTH CHARLESTON, SC AAA MOBILE PHONE AMP AAA TELEPHONE & COMMUNICATIONS, INC. AXZ HARLINGEN, TX A-ACCURATE ANSWERING SVC AAA CHICAGO, IL AACS COMMUNICATIONS INC AZX ARLINGTON, TX AARO COMMUNICATIONS AAR AAT RSA COMPANY,LP AYQ STATEN ISLAND, NY ABC TELECOM ABF PALM SPRINGS, CA ABCO COMMUNICATIONS GROUP ABO REHNART PARK, CA ABCOM ABM LOUISVILLE, KY ABILENE-SWEETWATER CELLULAR TEL CO ABS ABILENE, TX ABL NETWORK INC ABI AUSTIN, TX ABLE COMMUNICATIONS ABL ABLE MOBILE TELEPHONE AND PAGING SERVICE ALM ABRAHAM COMMUNICATIONS INC ABR TAMPA, FL ABS CBN TELECOM NORTH AMERICA INC BNO BURLINGAME, CA ABT LTD BGV OREGON CITY, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 8–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ABTEL LLC BTZ PHOENIX, AZ ACACIA TELEPHONE & COMMUNICATIONS CO (PREV AQC WASHINGTON, DC ACACIO COMM) A-CBT SYSTEM, INC. ABJ IRVING, TX ACC LONG DISTANCE CORP ACT ROCHESTER, NY ACC LONG DISTANCE CORP (PREV. ALTERNATIVE ALT ROCHESTER, NY COMMUNICATIONS CORP) ACC LONG DISTANCE CORP(PREV. NC CORP-PACE) NCP ROCHESTER, NY ACC NATIONAL TELECOM CORPORATION ANF ROCHESTER, NY ACC OF KENTUCKY LLC (PREV CENTRAL KENTUCKY EKC RICHMOND, KY CELLULAR CORPORATION) ACC OF MICHIGAN CORPORATION (PREV GILRO BTE VERO BEACH, FL CELLULAR) ACC OF MINNESOTA CORPORATION (PREV BUNYAN BNY FERGUS FALLS, MN CELLULAR CORPORATION) ACC OF OHIO CORPORATION (PREV SEVEN CELLULAR SVU NEW YORK, NY CORPORATION) ACC OF PENNSYLVANIA LLC (PREV AMRO CELLULAR AUA ZANESVILLE, OH CORPORATION) ACC OF TENNESSEE LLC (PREV KYLE CELLULAR KYR MORRISTOWN, TN CORPORATION) ACC OF WAUSAU CORPORATION (PREV WAUSAU WCX SCHAUMBURG, IL CELLULAR LICENSE CORP) ACC OF WEST VIRGINIA CORP (PREV EASTERN WIRLESS EWC NEW YORK, NY CELLULAR) ACC OF WISCONSIN LLC (PREV CHIPPEWA CELLULAR HWC SCHAUMBURG, IL CORPORATION) ACCESS CODE CORP ACE ACCESS CONFERENCE CALL SERVICE AVK WASHINGTON, DC ACCESS DIALING INC. ESG VIRGINIA BEACH, VA ACCESS INTEGRATED NETWORKS, INC. AXJ MACON, GA ACCESS INTERNATIONAL AJI WESTLAKE VILLAGE, CA ACCESS NETWORK SERVICES, INC. AKV DALLAS, TX ACCESS ONE, INC. EEO CHICAGO, IL ACCESS PLUS (FMLY TELE RATE) TXX ALBERT LEA, MN ACCESS PLUS PAGING INC DBA ALL CITY CALL LYC WAUKESHA, WI ACCESS POINT, INC. EPO CARY, NC ACCESS TELECOM AOJ TAMUNING, GM ACCESS TELECOM INTERNATIONAL ASB WAKEFIELD, MA ACCESS TELECOMMUNICATIONS INTERCONNECT AXX NORCROSS, GA ACCESS TELECOMMUNICATIONS NETWORK AZS LANCASTOR, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ACCESS UNLIMITED INC AEU LAWTON, OK ACCESS US AUS ACCESS WORLD COMMUNICATIONS AWW LAUDERHILL, FL ACCESS/ON MULTIMEDIA, INC. AOD CONCORD, NC ACCESSNET INTERNATIONAL AXF MANHATTAN, NY ACCESS-PLUS (NOW TCC COMMUNICATIONS, INC. - TGN) AEQ MILWAUKEE, WI ACCUCOMM TELECOMMUNICATIONS, INC. AUB IRWINTON, GA ACCUTEL OF TEXAS, INC. AUE DALLAS, TX ACD TELECOM AXK EAST LANSING, MI ACE COMMUNICATIONS AUW OAKTON, VA ACE LINK TELECOMMUNICATIONS, INC. AKT HOUSTON, MN ACI COMMUNICATIONS INC. AJM SCOTTSDALE, AZ ACKLEY CARIBBEAN ENTERPRISES, INC. KCE ST THOMAS, VI ACM, INC. AJC LAS VEGAS, NV ACME ANSWERING SERVICE AAN ACN COMMUNICATION SERVICES INC AYV FARMINGTON HILLS, MI ACOMM INC. AOI MINNEAPOLIS, MN ACS SYSTEMS, INC AYY SANTA ANA, CA ACSI COMMUNICATION SERVICES, INC. AVW OAKBROOK, IL ACTEL INTEGRATED COMMUNICATIONS, INC. EIG MOBILE, AL ACTEL, INC. EIA CEDAR KNOLLS, NJ ACTION COMMUNICATIONS, INC. ONX SCOTTSBLUFF, NE ACTION PAGE INC EDC GREELEY, CO ACTION PAGING CORPORATION AAF LOS ANGELES, CA ACTIVE ELECTRONICS AEA OSBURN, ID ACXIOM CORPORATION AXM CONWAY, AR AD/COM ADZ ADAMS ELECTRICAL CO-OPERTIVE DMO CAMP POINT, IL ADAMS TELSYSTEMS, INC. AYM GOLDEN, IL ADARONDACK CELLULAR TELEPHONE LP ACK FAIRFIELD, CA ADCOMP SYSTEMS, INC AYF NEW YORK, NY ADD-A-BEEPER ADVANCE TELECOM INC AAB ADDCOM ELECTRONICS AEO NORTH SYRACUSE, NY ADDISON CLEC NETWORKS, INC DBA BUZNET BUZ DALLAS, TX COMMUNICATIONS ADDISON LONG DISTANCE OPERATORS AGA AUSTIN, TX ADDVALUE COMMUNICATIONS ADU NOBLESVILLE, IN ADELPHIA BUS SOLUTIONS OF AL, LLC (PREV HYPERION HAL BRIDGEVILLE, PA COMM ALABAMA)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ADELPHIA BUS SOLUTIONS OF AR, LLC (PREV ENTERGY EYA PITTSBURGH, PA HYPERION ARKANSAS ADELPHIA BUS SOLUTIONS OF CT, INC (PREV HYPERION HCU BRIDGEVILLE, PA COMM OF CT, INC) ADELPHIA BUS SOLUTIONS OF DC (PREV HYPERION HDC BRIDGEVILLE, PA DISTRICT OF COLUMBIA) ADELPHIA BUS SOLUTIONS OF DE., LLC (PREV HYPERION HDE BRIDGEVILLE, PA COMM DELAWARE) ADELPHIA BUS SOLUTIONS OF FL (PREV HYPERION HFL BRIDGEVILLE, PA COMM OF FLORIDA, LLC) ADELPHIA BUS SOLUTIONS OF GA, LLC (PREV HYPERION HGA BRIDGEVILLE, PA COMM OF GEORGIA) ADELPHIA BUS SOLUTIONS OF JACKSONVILLE, INC (PREV CFA JACKSONVILLE, FL HYPERION -JACK) ADELPHIA BUS SOLUTIONS OF LA, INC(PREV ENTERGY EYL PITTSBURGH, PA HYPERION LOUISIANA ADELPHIA BUS SOLUTIONS OF MA, INC (PREV HYPERION HMA BRIDGEVILLE, PA COMM MASS) ADELPHIA BUS SOLUTIONS OF MD, LLC (PREV HYPERION HMD BRIDGEVILLE, PA COMM OF MARYLAND ADELPHIA BUS SOLUTIONS OF NC, L.P.(PREV HYPERION HOR BRIDGEVILLE, PA COMM N. CAROLINA ADELPHIA BUS SOLUTIONS OF NH, INC(PREV HYPERION HNH BRIDGEVILLE, PA COM NEW HAMPSHIRE ADELPHIA BUS SOLUTIONS OF NJ, LLC, (PREV HYPERION HNJ BRIDGEVILLE, PA COMM NEW JERSEY ADELPHIA BUS SOLUTIONS OF RI., INC (PREV HYPERION - HRH BRIDGEVILLE, PA RHODE ISLAND) ADELPHIA BUS SOLUTIONS OF SC, INC(PREV HYPERION HYS BRIDGEVILLE, PA OF SOUTH CAROLINA ADELPHIA BUS SOLUTIONS OF TEXAS, L.P. (PREV HTX BRIDGEVILLE, PA HYPERION TEXAS, L.P.) ADELPHIA BUS SOLUTIONS OF VT, INC (PREV HYPERION HYV BRIDGEVILLE, PA COMM OF VERMONT) ADELPHIA BUS SOLUTIONS OF WV LLC(PREV HYPERION HWV BRIDGEVILLE, PA COMM WEST VIRGINIA ADELPHIA BUSINESS SOLUTIONS (PREV HYPERION HTJ PITTSBURGH, PA TELECOMM) ADELPHIA BUSINESS SOLUTIONS OF MAINE, INC. AJQ BRIDGEVILLE, PA ADELPHIA BUSINESS SOLUTIONS OPERATIONS, INC. AQH BRIDGEVILLE, PA ADELPHIA TELECOMMUNICATIONS, INC. AHY COUDERSPORT, PA ADEPTEL INC AQX ALTAMONTE SPRINGS, FL ADIR INTERNATIONAL EXPORT, LTD DBA LA CURACAO LUR LOS ANGELES, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ADIRONDACK MOBILE RADIO CO INC ADD ADIRONDACK RADIO TELEPHONE CO INC ADR ADN ENTERPRISES,INC DBA NORTH TEXAS NRX LEWISVILLE, TX TELECOMMUNICATIONS ADP COMMUNICATIONS, INC. ADW EL PASO, TX ADS ALLIANCE DATA SYSTEMS, INC. AAJ DALLAS, TX ADT SECURITY SYSTEMS, INC. AYI PARSIPPANY, NJ ADVAMTEL LLC DBA PLAN B COMMUN (PREV ADVANCED AFE EATONTOWN, NJ AMERICAN TELECOM) ADVAMTEL, LLC DBA PLAN B COMMUNICATIONS PBY SHREWSBURY, NJ ADVANCE COMMUNICATIONS SOFTWARE INC ASF ADVANCE ELECTRONICS (SIDNEY) AES ADVANCE GLOBAL COMMUNICATIONS DGQ IRVING, TX ADVANCED AIRSYSTEMS TECHNOLOGY, INC AYT LANCASTER, TX ADVANCED BUSINESS TELEPHONE ABT FARGO, ND ADVANCED CELLULAR CORPORATION AYO ST. PETERSBURG, FL ADVANCED COMMUNICATIONS GROUP DVC ST LOUIS, MS ADVANCED COMMUNICATIONS INC ACJ DENISON, TX ADVANCED COMMUNICATIONS TECHNOLOGY, INC. DVH FORSYTH, MT ADVANCED COMMUNICATIONS, INC. AVF SPARKS, NV ADVANCED DATA COMMUNICATIONS LLC AJD BURLINGAME, CA ADVANCED ELECTRONICS (BILLINGS) AEB ADVANCED INMATE TECHNOLOGIES ADI DENVER, CO ADVANCED LOGIC RESEARCH (DELAWARE), INC. ADJ IRVINE, CA ADVANCED MANAGEMENT SERVICES ADH IRVING, TX ADVANCED MARKETING SERVICES INC AMS ADVANCED MOBILE COMM AVB DENVER, CO ADVANCED MOBILE COMMUNICATIONS AVM SANTA MARIA, CA ADVANCED NETWORK COMMUNICATIONS, L.L.C. DVW SCHALLER, IA ADVANCED PAGING ADP WALNUT CREEK, CA ADVANCED PAGING AVP MCALLEN, TX ADVANCED PAGING & COMMUNICATIONS AED SPOKANE, WA ADVANCED PAGING & TELEMESSAGING INC AND FORT SMITH, AR ADVANCED PAGING SERVICES INC APS ADVANCED RADIO COMMUNICATION SERVICES OF FLA., AFA BOCA RATON, FL INC. ADVANCED RADIO COMMUNICATIONS CO ACD ADVANCED RADIO COMMUNICATIONS SYSTEMS ARD RENO, NV ADVANCED TELCOM INCORPORATED AVT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ADVANCED TEL-COM SYSTEMS AVJ KERRVILLE, TX ADVANCED TELECOM GROUP,INC DVN LOS ALTOS, CA ADVANCED TELECOM INC. AVY WAXAHACHIE, TX ADVANCED TELECOM SYSTEMS AAE SAN JOSE, CA ADVANCED TELECOMMUNICATION NETWORK, INC. ADK BELLMAWE, NJ ADVANCED TELEMEDIA INTERNATIONAL AVQ MIAMI, FL ADVANCED TELEMESSAGING CENTER AVC REDDING, CA ADVANCED TELEPHONE PROMOTIONS INC. AVH MADISON HEIGHTS, MI ADVANCED TELEPHONE SYSTEMS, INC, DBA HTC AFH HICKORY, PA COMMUNICATIONS ADVANCED TRANSMISSION SYSTEMS ADT UPPER SADDLE RIVER, NJ ADVANTAGE CELLULAR INC AVE VENTURE, CA ADVANTAGE CELLULAR SYSTEMS, INC AYW ALEXANDRIA, TN ADVANTAGE CELLULAR SYSTEMS, INC. DVG ALEXANDRIA, TN ADVANTAGE COMMUNICATIONS INC AVG WICHITA, KS ADVANTAGE COMMUNICATIONS, INC. AGK PARAMUS, NJ ADVANTAGE OPERATOR SERVICES AOP SAN ANTONIO, TX ADVANTAGE TELECOMMUNICATIONS AGH EDISON, NJ ADVENT CONSULTING & TECHNOLOGY, INC. AYE WESLEY CHAPEL, FL AEA PLUS TELECOMS, INC. ETD SAN MATEO, CA AEEP, INC. EEI RICHARD, KY AENEAS COMMUNICATIONS, LLC AJE JACKSON, TN AEP COMMUNICATIONS, LLC AJA COLUMBUS, OH AERIAL COMMUNICATIONS, INC. (PREV. AMERICAN ABW CHICAGO, IL PORTABLE TELECOM) AERO COMMUNICATIONS, LLC AJF FREEPORT, IL AEROFONE INC AER AERONAUTICAL RADIO INC ARR ANNAPOLIS, MD AEROPHONE APN AES CYGNUS, L.L.C. EYS ARLINGTON, VA AEVIA, INC. AYZ WALNUT CREEK, CA AFFILIATED COMPUTER SYSTEMS INC AFD DALLAS, TX AFFILIATED TELECOM SERVICES INC AFF DUNCANVILLE, TX AFFINITY NETWORK INCORPORATED AJH LOS ANGELES, NV AFFORD A CALL FDC LIMA, OH AFFORDABLE PHONE COMPANY, INC. FPD NORRISTOWN, PA AFFORDABLE VOICE COMMUNICATIONS INC AFV LAS CRUCAS, NM AFN COMMUNICATIONS, LLC (PREV AMERICA’S FIBER MAF TULSA, OK NETWORK, LLC.)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–7 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AFN CONSULTANTS, INC AFU OVERLAND PARK, KS AFTCO LINK SYSTEMS INC AFO MIDDLEBURG HEIGHTS, OH AFTON COMMUNICATIONS INC AFT ROANOKE, VA AFX SYSTEMS AFX GREENVALE, NY AGEIS CELLULAR GROUP AGS MINNEAPOLIS, MN AGI MANAGEMENT HOLDINGS, INC. GMH DENVER, CO AGR BEEPERS & CELLULARS AGB HIALEAH, FL AGT ACCESS GLOBAL TELECOM INC. AAG WEBSTER, MA AIC ASIA INTERNATIONAL SERVICES CORPORATION AYS RICHMOND, BC AIKEN AUGUSTA CELLULAR TEL CO AIK AUGUSTA, GA AIR BEEP ABP AIR BEEP CORPORATION ABC AIR CALL AIR AIR CITY ARY AIR COMMUNICATIONS CO ACN AIR COMMUNICATIONS OF CENTRAL WISCONSIN INC AEN WISCONSIN RAPIDS, WI AIR COURIERS INTERNATIONAL INC ACI AIR PAGE APA AIR PAGE - THE BEEPER PEOPLE INC AIP AIR PAGE CORPORATION AZZ BROOKFIELD, WI AIR PAGE MOBILE SERVICE APM AIR TO GROUND OF IDAHO AGI AIR TOUCH PAGING, INC (PREV MESSAGE CENTER MCB EAST HARTFORD, CT BEEPERS) AIR WAVES COMMUNICATIONS INC AWZ PARIS, TX AIRADIGM COMMUNICATIONS, INC. AGV LITLE CHUTE, WI AIRBANK USA, INC. ABH LOS ANGELES, CA AIRCALL COMMUNICATIONS INC AIU DECATUR, IL AIRCALL INC ARL AIRCALL INC (ASHVILLE) ARA AIRCALL NORTHEAST INC ANE AIRCALL NORTHWEST INC ARN AIRCALL NY CORP ACL AIRCALL OF TEXAS ACA AIRCOM ARW MOBERLY, MS AIRCOMM WIRELESS AND CABLE IRW HOUSTON, TX AIRCOVER NETWORK SOLUTIONS, INC. IOU THORNTON, CO AIRGATE WIRELESS, L.L.C. IGW CHARLOTTE, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–8 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AIRNEX COMMUNICATIONS AKX SAN RAMON, CA AIRPAGE BIG SKY ASK BILLINGS, MT AIRPHONE CO INC APH AIRPHONE INC APE AIRPULSE, INC. APK ATLANTA, GA AIRSIGNAL AGZ OVERLAND PARK, KS AIRSIGNAL INC ACH CHICAGO, IL AIRSIGNAL INTERNATIONAL INC AIL AIRSIGNAL INTERNATIONAL INC SPOKANE AIS AIRSIGNAL INTERNATIONAL OF PHILADELPHIA PA INC AIN AIRSIGNAL INTERNATIONAL OF PITTSBURGH PA INC ISZ AIRSIGNAL OF CALIFORNIA ACF AIR-TEL INC ATL PONTIAC, IL AIRTOUCH CELLULAR (PREV. PAC TEL CELLULAR) PUL WALNUT CREEK, CA AIRTOUCH PAGING AHG AUSTIN, TX AIRTOUCH PAGING (PREV. PACTEL PAGING) PLP DALLAS, TX AIRVOICE INC ARV AIRWAVE WIRELESS COMMUNICATIONS, INC. AQJ SCOTTSBLUFF, NE AIRWEST AIRLINES LDB AWA HOUSTON, TX AKRON CANTON CONNECTION, INC. FORMERLY J. KTO HARTVILLE, OH HORNING COMPANY, INC. AKRON CELLULAR AKR AKRON, OH AKS, LC KSA CHEROKEE, OK ALABAMA WIRELESS, INC BWR CLEVAND, OH ALAMO CITY LONG DISTANCE INC ACQ SAN ANTONIO, TX ALAMOSA PCS LLC LPL LUBBOCK, TX ALARM CENTER INC AXR LACEY, WA ALASCOM (AT&T) AAM ANCORAGE, AK ALASKA COMMUNICATION SYSTEMS INC DBA ATU AKQ ANCHORAGE, AK TELECOMMUNICATIONS ALASKA DIGITEL, LLC (PREV PACIFICOM ALASKA, LLC) PFA MEMPHIS, TN ALASKA NETWORK SYSTEMS, INC. AKO ANCHORAGE, AL ALASKA TELEPHONE CO. LSK TOK, AK ALBA DATA TECHNOLOGY INC (PREV DATAAMERICA DCA VIENNA, VA CORP) ALBANY CGSA LIMITED PARTNERSHIP ALB PEARL RIVER, NY ALBANY TELEPHONE COMPANY ALY ALBANY, NY ALBERTA GOVERNMENT TELEPHONES AGT EDMONTON, AL ALBUQUERQUE MOBILE TELEPHONE SERVICE AQM

Proprietary — Licensed Material See proprietary restrictions on title page. 8–9 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ALBUQUERQUE RADIO TELEPHONE SERVICE AQR AL-CALL, INC. AYB ALMA, GA ALCO ANSWERING SERVICE INC AOA ALD COMMUNICATIONS ADO SAN MATEO, CA ALEC, INC (PREV METROLINK INTERNET SERVICES OF MKE MELBOURNE, FL PORT STLUCIE INC) ALEC, INC (PREV OPTILINK COMMUNICATIONS, INC.) OLK TIFTON, GA ALEC, INC. WTF PADUCAH, KY ALEC, INC. (PREV GIETEL, INC.) GLZ NEW BERN, NC ALERT COMMUNICATIONS ACU ALERT OPERATORS AOR GARLAND, TX ALERT PAGING ATP ALERT PAGING INC ART ALEXANDER GROUP TELECOMMUNICATIONS LGP MANHATTAN, NY ALEXANDRA CELLULAR CORPORATION AXD NEW YORK, NY ALGER COMMUNICATIONS AGE GRANDVILLE, MI ALIANT INC AYH ST JOHNS, CN ALL CITY PAGING AYP TARZANA, CA ALL COMMUNICATIONS TECHNOLOGY SERVICES ATH GREENLAKE, WI ALL FLORIDA COMMUNICATIONS AFC ALL PAGE AGW UTICA, NY ALL TELECOMMUNICATIONS, INC. LLZ MINEOLA, NY ALL WAYS COMUNICATIONS AYC HAGERSTOWN, MD ALL WEST COMMUNICATIONS INC AWC VANCOUVER, WA ALL WEST WORLD CONNECT AXW KAMAS, UT ALL WEST/WYOMING INC WWY KAMAS, UT ALLCOM COMMUNICATIONS AOQ RUIDOSO DOWNS, NM ALLCOM COMMUNICATIONS, INC. AJO SPRINGDALE, AR ALLCOM LONG DISTANCE AOM PECOS, TX ALL-COMMUNICATIONS LUT COVINGTON, KY ALLEGAN CELLULAR LP (PREV. KULL CELLULAR) KUL ALLEGAN, MI ALLEGHENY COMMUNICATIONS CONNECT, INC. LOE GREENSBURG, PA ALLEGHENY HYPERION TELECOMMUNICATIONS L.L.C. LHT BRIDGEVILLE, PA ALLEGHENY INTERNATIONAL AGY ALLEGHENY NATIONAL COMMUNICATIONS INC AXN ACTON, MA ALLEGIANCE TELECOM, INC. AFY DALLAS, TX ALLEN COMMUNICATION SERVICES AXE GRAHAM, TX ALLENDALE TELEPHONE COMAPANY LEN ALLENDALE, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–10 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ALLENTOWN CELLULAR TELEPHONE CO AWN GREENSBORO, NC ALLGOOD TAYLOR TELEPHONE AGO PLANO, TX ALLIANCE DATA SYSTEMS, INC. LIA DALLAS, TX ALLIANCE GROUP SERVICES INC AYG WESTERN, CT ALLIANCE NETWORK INC LNI NEW ORLEANS, LA ALLIED COMMUNICATIONS INC ADC ALLIED LONG DISTANCE SERVICES INC ALD BEAUMONT, TX ALLIED RISER OF ILLINOIS, INC. LLR WASHINGTON, DC ALL-NET ANX MACON, GA ALLPAGE, INC LPE SAVANNAH, GA ALL-STATE COMMUNICATIONS ALA BURLINGAME, CA ALLSTATE COMMUNICATIONS, INC. LLO CHATSWORTH, CA ALLSTATE NETWORK, INC. AWF LOS ANGELES, CA ALLTEL COMMUNICATIONS HOLDINGS OF THE MIDWEST LCN WILLISTON, VT (PREV LINCOLN COMM. ALLTEL COMMUNICATIONS INC(PREV ALLTEL MOBILE AAK HUDSON, OH COMM - ARKANSAS INC) ALLTEL COMMUNICATIONS NEBRASKA INC(PREV LTT OMAHA, NE LINCOLN TELE & TELEGRAPH) ALLTEL COMMUNICATIONS OF NEBRASKA, INC. (PREB NBT GRAND ISLAND, NE NEBRASKA CELLULAR) ALLTEL COMMUNICATIONS OF THE MIDWEST INC(PREV AWH LINCOLN, NE ALIANT MIDWEST INC) ALLTEL COMMUNICATIONS, INC (PREV. 360 LONG CCQ OMAHA, NE DISTANCE,INC) ALLTEL COMMUNICATIONS, INC(PREV ALLTEL LONG AEJ LITTLE ROCK, AR DISTANCE) ALLTEL SYSTEMS OF THE MIDWEST, INC. (PREV ALIANT LNS LINCOLN, NE SYSTEMS INC) ALLTELCO ALL ALLWORLD COMMUNICATIONS NETWORK AWY BROOKLYN, NY ALMA LONG DISTANCE, L.L.C LMD ALMA, MO ALMA TELEPHONE COMPANY INC LMA ALMA, GA ALMAR COMMUNICATIONS ALJ ROCKFORD, IL ALO-USA CORPORATION AUQ MIAMI, FL ALPHA CELLULAR AHA COLUMBUS, IN ALPHA CELLULAR AHC BATON ROUGE, LA ALPHA DATA SERVICES INC AFZ STATEN ISLAND, NY ALPHA DISPLAY PAGING INC ALH ST LOUIS, MO ALPHA MESSAGE CENTER, INC AHJ NORTHFIELD, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–11 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ALPHA PAGING, INC AHK BLACK RIVER, NY ALPHA WIRELESS COMM CO DBA MANKATO MOBILE AWJ N MANKATO, MN RADIO & COMM SPECIALIST ALPHAQUEST NETWORK SERVICES, INC(PREV ISS/ ISS APIOS, CA NETWORK SERVICES) ALPINE COMMUNICATIONS, L.C. AXA DES MOINES, IA ALPINE NETWORK SERVICES, L.C. LPN DES MOINES, IA ALPINE PCS, INC. AEM GAYLORD, MI ALPINE-MICHIGAN E, INC. LIE GAYLORD, MI ALPINE-MICHIGAN F, LLC. LIF GAYLORD, MI AL’S 2-WAY RADIO ALW LA GRANDE, OR ALTA MUNICIPAL UTILITIES AJJ ALTA, IA ALTAIRE CORPORATION AYR NEW PORT BEACH, CA ALTERNATE ACCESS SERVICES INC ALZ ALBUQUERQUE, NM ALTERNATE BILLING SOLUTIONS LIMITED ABG AUSTIN, TX ALTERNATE COMMUNICATIONS TECHNOLOGY INC ACX INDIANAPOLIS, IN ALTERNATE COMMUNICATIONS, INC. AQY SCOTTSDALE, AZ ALTERNATIVE LONG DISTANCE, INC. AXV CASTLE ROCK, CO ALTERNATIVE LONG DISTANCE, INC. AZD SAN MARCOS, TX ALTERNATIVE NETWORK SERVICES ALV COPLEY, OH ALTERNATIVE NETWORK SERVICES INC AIV SAN MARCOS, TX ALTERNATIVE PHONE, INC AJP OCALA, FL ALTERNATIVE TELECOMMUNICATION SERVICES, INC. AZV BROOKSVILLE, FL ALTERNATIVE TELEPHONE CONNECTIONS, INC. LEO FT WORTH, TX ALTERNATIVE TOLL CARRIER ANV D/FW AIRPORT, TX ALTERNET OF VIRGINIA AVV RICHMOND, VA ALTON CELTELCO AON JERSEYVILLE, IL ALTOONA TELEMESSAGE CENTER ATN AMA TELECOM, INC. AFQ AMARILLO, TX AMADEUS COMMUNICATIONS ADY KENNEDALE, TX AMAFLA TELECOM, INC. MFU MIAMI, FL AMARILLO CELLULAR TELEPHONE CO ARU AMARILLO, TX AMARILLO TELEPHONE CO., INC. DBA A-1 AOC LUBBOCK, TX COMMUNICATIONS, INC. AMC CELLULAR CORP AUR FAYETTEVILLE, NY AMCELL AEZ KING OF PRUSSIA, PA AMCI ALARM AMA AMCOM INC ACO AMCOM, LLC FOI PHOENIX, AZ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–12 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AMERI TEL AEI SHERMAN OAKS, CA AMERICA CALLING INC ACG BELLEVUE, WA AMERICA LONG DISTANCE, INC. MIJ DENVER, CO AMERICA OF BAKERSFIELD ABK BAKERSFIELD, CA AMERICA ONE COMMUNICATIONS, INC. AOX VIENNA, VA AMERICA ONLINE INC ERA DULLES, VA AMERICALL COMMUNICATIONS CORP AIY HOUSTON, TX AMERICALL INC (ALABAMA) AMR AMERICALL INTERNATIONAL, LLC AKE GLENDALE, AZ AMERICALL THE LONG DISTANCE PEOPLE AME JACKSONVILLE, FL AMERICAN AIRLINES INC AAI DALLAS, TX AMERICAN ALPHA DISPATCH SERVICES INC. AAH FARMINGDALE, NY AMERICAN AUTOMATED TELEPHONE (AAT) AAD DALLAS, TX AMERICAN BEEPER CO ABX SCHAUMBURG, IL AMERICAN BUSINESS ALLIANCE ABA KINGSTON, PA AMERICAN CELLULAR COMMUNICATIONS, INC. ABD TARZANA, CA AMERICAN CELLULAR WIRELESS MWB LAWRENCEVILLE, GA AMERICAN COIN TEL INC AIJ LIVERPOOL, NY AMERICAN COMMUNICATION SYSTEMS MRJ LITTLETON, CO AMERICAN COMMUNICATIONS ANC AMERICAN COMMUNICATIONS INC AMU WICHITA, KS AMERICAN COMMUNICATIONS INTERNATIONAL LTD ANU GAITHERSBURG, MD AMERICAN COMMUNICATIONS NETWORK ACW NEWPORT BH, CA AMERICAN COMMUNICATIONS TECHNOLOGY INC AXC RENO, NV AMERICAN CONSULTANTS ALLIANCE, INC. MIF LOUISVILLE, KY AMERICAN DATACOM CORPORATION AMD AMERICAN DISCOUNT TELECOMMUNICATIONS INC AOU DUNCANVILLE, TX AMERICAN EXPRESS EXPRESS PHONE AEE DENVER, CO AMERICAN EXPRESS PHONE LONG DISTANCE SVC AMX NEW YORK, NY AMERICAN EXPRESS TRAVEL RELATED SERVICES ARE DENVER, CO AMERICAN FIBER COM, INC. AFB WAXAHACHIE, TX AMERICAN FIBER NETWORK OF VIRGINIA, INC. VAF OVERLAND PARK, KS AMERICAN FIBER NETWORK, INC. AFW OVERLAND PARK, KS AMERICAN FIBER SYSTEMS, INC. MFY ROCHESTER, NY AMERICAN FIBERLINE CO AFL SAN ANTONIO, TX AMERICAN FIBERNET, INC. AFI DUNCANVILLE, TX AMERICAN GATEWAY TELECOMMUNICATIONS INC. AKY RICHARDSON, TX AMERICAN INFORMATION NETWORK INC AFR ROLLING MEADOWS, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–13 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AMERICAN INMATE COMMUNICATIONS INC AIQ SAN ANTONIO, TX AMERICAN INTERNATIONAL MICROCOMM INC AIM AMERICAN INTERNATIONAL TELECOM AIE SAN ANTONIO, TX AMERICAN INTERNATIONAL TELECOMMUNICATIONS AIX BURLINGTON, VT AMERICAN INTERNATIONAL TELEPHONE AIT SAN FRAN, CA AMERICAN INTERNATIONAL TELEPHONE, INC. AXI PURCHASE, NY AMERICAN INTERSTATE COMMUNICATIONS CORP AIC AMERICAN LDS AMF MOBILE, AL AMERICAN LIGHTWAVE COMMUNICATIONS, INC. ELW HOUSTON, TX AMERICAN LOCAL TELECOMMUNICATIONS, LLC DBA ALT EAT DALLAS, TX COMMUNICATIONS LLC AMERICAN LONG DISTANCE CO AGD HOUSTON, TX AMERICAN LONG DISTANCE EXCHANGE INC AXL LOS ANGELES, CA AMERICAN LONG DISTANCE INC ANL PORTLAND, OR AMERICAN LONG LINES ALG HORSHAM, PA AMERICAN METROCOMM CORPORATION AOZ NEW ORLEANS, LA AMERICAN MICROWAVE COMMUNICATIONS INC ARC AMERICAN MOBIL SATELLITE CORPORATION AOB RESTON, VA AMERICAN MOBILEPHONE OF ALABAMA AAL AMERICAN MOBILPHONE PAGING AWM CHARLESTON, WV AMERICAN MONEY CORPORATION MJO INDIANAPOLIS, IN AMERICAN MOTOR INNS AMI AMERICAN NATIONAL TELECOM ANZ LOS ANGELES, CA AMERICAN NETWORK EXCHANGE INC (SUB OF AMNEX, ANK ORLANDO, FL INC) AMERICAN NETWORK SERVICES ANT DALLAS, TX AMERICAN NETWORK SERVICES, INC. MKR MT. VERNON, NY AMERICAN NETWORK, INC AKI NEW YORK, NY AMERICAN NORTEL COMMUNICATIONS INC AOO SALT LAKE CITY, UT AMERICAN PAGING AXP BURTONSVILLE, MD AMERICAN PAGING OF PA AZP PITTSBURGH, PA AMERICAN PAGING SERVICES APJ SOUTHFIELD, MI AMERICAN PERSONAL COMMUNICATIONS AEY BETHESDA, MD AMERICAN PHONE CORPORATION MHH SARASOTA, FL AMERICAN PHONE SERVICES ERP ALPHARETTA, GA AMERICAN PREPAID TELEPHONE SERVICE, LLC MJJ MARIETTA, GA AMERICAN PRIVATE LINE APL AMERICAN PTT PTX LOS ANGELES, CA AMERICAN PUBLIC & PRIVATE COMMUNICATIONS INC APV MIAMI, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–14 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AMERICAN RADIO-TELEPHONE SERVICE INC ARS BALTIMORE, MD AMERICAN RURAL CELLULAR AUZ PANAMA CITY, FL AMERICAN SAMOA LICENSE INCORPORATED SAY ALPHARETTA, GA AMERICAN SHARECOM OF WASHINGTON ALI AMERICAN TEL GROUP INC AMJ ALBUQUERQUE, NM AMERICAN TELECHARGE, INC. ERH MULLICA HILL, NJ AMERICAN TELECOMMUNICATION SERVICES AZI SOUTHFIELD, MI AMERICAN TELECOMMUNICATIONS & TECHNOLOGY, EMH FT. LAUDERDALE, FL INC. DBA AMTEL TECH AMERICAN TELECOMMUNICATIONS CORP ATU DALLAS, TX AMERICAN TELECOMMUNICATIONS CORP (VENTURA) AEV VENTURA, CA AMERICAN TELECOMMUNICATIONS ENTERPRISES AEW SEATTLE, WA AMERICAN TELEDATA DBA US DIAL USD JACKSONVILLE, FL AMERICAN TELEDATA INC ADA DAYTONA, FL AMERICAN TELEGRAM CORP AGM BEVERLY HILLS, CA AMERICAN TELEMANAGEMENT ATT PALO ALTO, CA AMERICAN TELENET AET ONTARIO, CA AMERICAN TELEPHONE CO THE AZM ALLENTOWN, PA AMERICAN TELEPHONE SERVICE AMV HUNTINGTON, WV AMERICAN TELESIS ATJ MCLEAN, VA AMERICAN TELESOURCE INTERNATIONAL, INC. AYL SAN ANTONIO, TX AMERICAN TELESYSTEMS ATY AMERICAN TELEVISION RELAY ATR AMERICAN TELNET INC AQA MIAMI, FL AMERICAN TEL-SAVE OF SPOKANE INC ASV SPOKANE, WA AMERICAN TEL-TEK INC AQN LARCHMONT, MY AMERICAN TELTRONIX ARX SCRANTON, PA AMERICAN TRANSTECH ATK JACKSONVILLE, FL AMERICA’S CHOICE TEL INC ARH MEDESTO, CA AMERICA’S DIGITAL SATELITE TELEPHONE EIL LAS VEGAS, NV AMERICA’S TELE-NETWORK CORP. AKP ALPHARETTA, GA AMERICATEL (PREV DISCOVERY TELECOMMUNICATIONS DVT MIAMI, FL INC) AMERICELL COMMUNICATIONS AQQ WILBUR, WA AMERICELL PA-3 LIMITED PARTNERSHIP AQE ITHACA, NY AMERICOM COMMUNICATIONS, LLC AKM SACRAMENTO, CA AMERICOM INC AKA WAUKESHA, WI AMERICOM TECHNOLOGIES AOG DELRAY BEACH, FL AMERICONNECT, INC. AEH OVERLAND PARK, KS

Proprietary — Licensed Material See proprietary restrictions on title page. 8–15 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AMERIMEX COMMUNICATIONS CORP. MXA ROSWELL, GA AMERINET COMMUNICATION ARJ FAYETTEVILLE, GA AMER-I-NET SERVICES CORP AIW FARMINGDALE, NJ AMERIPHONE AHN AUSTIN, TX AMERISYSTEMS PARTNERSHIP (MERG EOCA & EO TECH) EOC DALLAS, TX AMERITALK ALK ARVADA, CO AMERITECH ADVANCED DATA SERVICES AAV CHICAGO, IL AMERITECH AUDIOTEX SERVICES AAX CHICAGO, IL AMERITECH CELLULAR AHO HOFFMAN ESTATES, IL AMERITECH COMMUNICATIONS INTERNATIONAL, INC. AKN CHICAGO, IL AMERITECH CORP AIH HOFFMAN ESTATES, IL AMERITECH GLOBAL GATEWAY SERVICES, INC. MGB CHICAGO, IL AMERITECH LONG DISTANCE SERVICES AKD HOFFMAN ESTATES, IL AMERITECH MOBILE COMMUNICATIONS AZE UNIONTOWN, OH AMERITECH MOBILE COMMUNICATIONS INC ADM HICKORY HILLS, IL AMERITECH MOBILE COMMUNICATIONS INC AHM MILWAUKEE, WI AMERITECH MOBILE COMMUNICATIONS INC FOR AHD SCHAUMBURG, IL DETROIT AMERITECH PUBLISHING INC AHZ TROY, MI AMERITECH SERVICES ACV FRAMINGTON, MI AMERITEL (PREV. NAPA VALLEY TELECOMMUNICATIONS NVT NAPA, CA SERVICES) AMERI-TEL COMMUNICATIONS INC AIZ NORMAN, OK AMERITEL LONG DISTANCE INC ALQ RICHARDSON, TX AMERITEL PAGING INC. AGC APPLETON, WI AMERIVISION COMMUNICATIONS, INC. AVU OKLAHOMA CITY, OK AMERIVOICE TELECOMMUNICATIONS INC AVO BROOKFIELD, WI AMERTEL CO AMT AMFAC HOTELS AND RESORTS INC AHR AMI COMMUNICATIONS, INC. AOY GENEVA, IL AMICA WIRELESS PHONE SERVICE, INC. AHX IOWA CITY, IA AMIERITEL INC AMQ AMM COMMUNICATIONS AQW COLD SPRINGS, MN AMNET INC AXT MESA, AZ AMP ELECTRIC INC AEL AMPS CELLULAR OF CHICAGO, INC. MGH SCHAUMBURG, IL AMPS CELLULAR OF ILLINOIS, INC. MHV SCHAUMBURG, IL AMPS INC AMZ AMPTELCO CORP ALX ALBUQUERQUE, NM

Proprietary — Licensed Material See proprietary restrictions on title page. 8–16 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AMRIGON ENTERPRISES INC AGN AMTEL COMMUNICATIONS, INC. MKU JACKSON, MS AMTEL CORP AMC AMTEL INC AML AM-TEL, INC. MZA GAINESVILLE, GA AMTEL, LLC. MFM BAKERSFIELD, CA AM-TEX DISPATCH SERVICE CO ADS AMTRAK ARK WASHINGTON, DC AMTRON CORP ARQ KANSAS CITY, MO AMVOX AVX LOS GATOS, CS ANANDA WORLD BROTHERHOOD VILLAGE AWB NEVADA CITY, CA ANDALUSIA RADIO SERVICE ADL ANDALUSIA, AL ANDERSON COMCO ADN ANDERSON EFFECTS INC AEF MENTONE, CA ANDERSON TELEPHONE ANSWERING SERVICE ATA ANDREW TELECOM INC AJW ORLAND PARK, IL ANDRIL SERVICE GROUP AGF LAREDO, TX ANEW BROADBAND, INC. NBW MIAMI, FL ANEW TELECOMMUNICATIONS CORP DBA CALL AMERICA WMA SAN LUIS OBISPO, CA ANGELCOM, INC. NGL WEST MEMPIS, AR ANISHNABE COMMUNICATIONS ENTERPRISE, INC. AHE MT. PLESANT, MI ANNE ARUNDEL COUNTY AAU ANNAPOLIS, MD ANNISTON COMMUNICATIONS SVC ACS ANNOX, INC. AXY PLEASANT VIEW, TN ANS-A-PHONE COMMUNICATION INC AAC ANS-A-PHONE OF PEARL . APP ANSARING AGX ST LOUIS, MO ANSER ANGELO ANB SAN ANGELO, TX ANSERFONE OF ST LUCIE CITY ASL ANSERPHONE INC ASE ANSERWRITE AWR WINTERPARK, FL ANSWER BY BIRKEN ABB ANSWER FARGO ARF MINNEAPOLIS, MN ANSWER FORT SMITH INC AFS FORT SMITH, AR ANSWER GIRL INC ARG SAN JOSE, CA ANSWER ILLINOIS ARI DES MOINES, IA ANSWER INC ASR ANSWER INC - GALVESTON ASG

Proprietary — Licensed Material See proprietary restrictions on title page. 8–17 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ANSWER INC - HOUSTON ASH ANSWER IOWA AIA ANSWER MADISON TELEPHONE SECRETARIES INC ANM ANSWER PAGE AHH DALLAS, TX ANSWERING ASSOCIATES INC ANS ANSWERING SERVICE OF HOPKINSVILLE AHP ANSWERITE COMMUNICATIONS ASW ANSWERITE PROFESSIONAL TELEPHONE SERVICE ASP ANSWERPHONE AWP ANSWERPHONE AND RADIO PAGING INC ARP ANSWERPHONE INC APO ANSWERPHONE OF GOLDSBORO AGL ANSWERPHONE OF NATCHEZ ANH ANTI-DEFAMATION ADF ANTIGO CALL AMERICA AGQ ANTIGO, WI ANTLER COMMUNICATIONS INC ANR KINGSVILLE, TX ANY ONE IS OKAY (PREV. SCHUMAN COMMUNICATIONS) SHU KENNEDALE, TX AOS CONTINENTAL OF CA AOT SACRAMENTO, CA AP&T LONG DISTANCE, INC. AXG PORT TOWNSEND, WA APCO TELECOMMUNICATIONS, INC. POB BEVERLY, MA APEX TELECOM INC PXT OAKLAND, CA APOGEE TELECOM, INC. OGM AUSTIN, TX APOLLO TELECOM AOL SALT LAKE CITY, UT APOLLO TELECOMMUNICATIONS SERVICE APZ APPALACHAN CELLULAR GENERAL PARTNERSHIP AHV HAROLD, KY APPALACHIAN WIRELESS AZW HAROLD, KY APPLE COMMUNICATIONS CORP AZL AUSTIN, TX APPLE COMMUNICATIONS INC APQ CHICAGO, IL APPLECOM LTD LPP ISLANDIA, NY APPLETON-OSHKOSH-NEENAH MSA LIMITED AOK APPLETON, WI APPLIANCE & TV RENTALS, INC DBA FONES-4-U, INC. FSU CRESTVIEW, FL APPLIED BUSINESS TECHNOLOGIES INC APB PHOENIX, AZ APPLIED SIGNAL CORP APD SAN JOSE, CS APPLIED TECHNOLOGY GROUP INC AGU BAKERSFIELD, CA APPROVED GROUP TELECOM AGP KENNEDALE, TX AQUIS COMMUNICATIONS, INC. QUC PARSIPPANY, NJ AQUITEL COMMUNICATIONS CORP (PREV BELL-EAST CO. PRX BAYSHORE, NY INC,)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–18 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AR MARKETING INC AMK DENTON, TX ARAMTEL AEK BALTIMORE, MD ARAPAHOE TELEPHONE COMPANY RPO ARAPAHOE, NE ARAX COMMUNICATIONS RXM GLENDALE, CA ARBROS COMMUNICATIONS INC BOI SILVER SPRINGS, MD ARBROS COMMUNICATIONS LICENSING COMPANY, N.E. AZG LANDOVER, MD ARBUCKLE COMMUNICATIONS AUK ARDMAORE, OK ARBUCKLE COMMUNICATIONS CONSULTANTS ARB DUNCAN, OK ARC LONG DISTANCE, INC. AJR DALLAS, TX ARCH (PREV PAGENET PAGING NETWORK INC) PPN PLANO, TX ARCH (PREV PAGENET) PNK OAKBROOK TERR, IL ARCH (PREV PAGING NETWORK OF MICHIGAN INC) PGK SOUTHFIELD, MI ARCH LONG DISTANCE (PREV LOTUS COMM CORP) LUS HOUSTON, TX ARCH WIRELESS HOLDINGS, INC (PREV ARCH PAGING RHA IRVING, TX INC.) ARCH WIRELESS HOLDINGS, INC (PREV PAGING PWK PLANO, TX NETWORK, INC) ARCH WIRELESS HOLDINGS, INC. (PREV ARCH PAGING, UWP BELLEVUE, WA INC) ARCO PETROLEUM PRODUCTS CO (AKA ARCO PAY POINT) AKU LOS ANGELES, CA ARCPHONE CANADA RPQ RICHMOND HILL, ON ARDMORE COMMUNICATIONS, LLC. RDU ARDMORE, TN ARDMORE TELEPHONE COMPANY RDH ARDMORE, AL ARGO COMMUNICATIONS CORP ACC ARIANA TELECOMMUNICATION INC RIA LOS ANGELES, CA ARIEL CORPORATION RLP CRANBURY, NJ ARIES NETWORK, INC. RIE LOS ANGELES, CA ARIZONA CELLULAR COMMUNICATION DBA CELLULAR EMV KINGMAN, AZ ONE MOHAVE ARKANSAS BLUECROSS BLUESHIELD AKB LITTLE ROCK, AR ARKANSAS CELLULAR LIMITED PARTNERSHIP AKZ ROSWELL, GA ARKANSAS COMMUNICATIONS AND ELECTRONICS INC AKC ARKANSAS DEPARTMENT OF HUMAN SERVICES AKH LITTLE ROCK, AR ARKANSAS STATE TELEPHONE AKW HUNTSVILLE, TX ARKANSAS TELPHONE COMPANY, INC. BTF CLINTON, AR ARKANSAS-12 CELLULAR CORP AKS JACKSON, MS ARKLA LONG DISTANCE ADVANTAGE AKG SHREVEPORT, LA ARMOUR COMMUNICATIONS ARM ARMSTRONG COMMUNICATIONS, INC. AOE BUTLER, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–19 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ARMSTRONG TELECOMMUNICATIONS, INC. RLU BUTLER, PA ARMSTRONG TELEPHONE COMPANY AHU CLINTON, PA ARN COMMUNICATIONS CORP AUM MIAMI, FL AROOSTOOK COMMUNICATIONS ARO ARRIVA COMMUNICATIONS, INC(PREV GLOBAL TELECOM FTC BAY SPRINGS, MS INC) ARRIVAL COMMUNICATIONS, INC. (PREV ACN AZC HIGHLANDS RANCH, CO COMMUNICATIONS, INC) ARTHUR ANDERSON & CO AZA CHICAGO, IL ASAP PAGING INC AQP HALLETTSVILLE, TX ASCENDING TECHNOLOGIES INC AWT BEACHWOOD, OH ASCENDTEL, LLC. SDZ MOLINE, IL ASCI’S TELEPHONE EXPRESS NETWORK ADV SAN FRANCISCO, CA ASEAN TELECOM, LLC EAN UNION CITY, CA ASHLAND CALL AMERICA AHL ASHLAND, WI ASHTON COMMUNICATIONS CORPORATION AHT CHULA VISTA, CA ASIA ACCESS TELECOM INC AJS LOS ANGELES, CA ASIA COMMUNICATIONS INTERNATIONAL INC SIQ SAN JOSE, CA ASIAN AMERICAN ASSOCIATION SNX EL MONTE, CA ASIATEL, INC. AJL SANTA MONICA, CA ASIATONE, LLC IES OXFORD, MD ASPIRE TELECOM, INC. AJZ ASHEVILLE, NC ASSOCIATED BUSINESS TELEPHONE SYSTEMS ABU BERLIN, NJ ASSOCIATED COMMUNICATIONS INC ACM ASSOCIATED COMMUNICATIONS INC AQI PLAINVIEW, TX ASSOCIATED COMMUNICATIONS INC (PAGING) ASO ASSOCIATED COMMUNICATIONS OF NEW YORK INC ANY ASSOCIATED GROCERS INC AGR SEATTLE, WA ASSOCIATED NETWORK PARTNERS, INC. AWK SPRINGFIELD, IL ASSOCIATED PAGING AND TELEPHONE ASX CORPUS CHRISTI, TX ASSOCIATED TELENET INC ASN CORPUS CHRISTI, TX ASSOCIATED TELEPHONE ANS SERVICE MOBILE ASM ASSOCIATED TELEPHONE ANSWERING SERVICE AST ASSOCIATED TELEPHONE DESIGN ATD ASSOCIATED TELEPHONE DESIGNS, INC. AGJ NEW YORK, NY ASSOCIATED TELEPHONE MANAGEMENT SERVICES ATM ASSOCIATED TERMINATING NETWORK ATW CORPUS CHRISTI, TX ASSOCIATION COMMUNICATIONS AQO SEATTLE, WA ASTAC LONG DISTANCE AFG ANCHORAGE, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–20 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ASTROCOM CORPORATION OOR MIAMI, FL AT&T (LOCAL) LOA BASING RIDGE, NJ AT&T CANADA LONG DISTANCE SERVICES (PREV. UNITEL UCN TORANTO, ON, CN COMM. -TORONTO) AT&T CANADA, INC. (PREV METRONET MNO TORONTO, ON COMMUNICATIONS CORP) AT&T COMMUNICATIONS ATX AT&T COMMUNICATIONS OF CALIFORNIA INC ACR AT&T COMMUNICATIONS OF DELAWARE INC ADE AT&T COMMUNICATIONS OF ILLINOIS INC AIO AT&T COMMUNICATIONS OF INDIANA INC AID AT&T COMMUNICATIONS OF MARYLAND INC AMY AT&T COMMUNICATIONS OF MICHIGAN INC AMG AT&T COMMUNICATIONS OF MIDWEST INC AMW AT&T COMMUNICATIONS OF MOUNTAIN STATES INC AMO AT&T COMMUNICATIONS OF NEVADA INC ANA AT&T COMMUNICATIONS OF NEW ENGLAND INC ANG AT&T COMMUNICATIONS OF NEW JERSEY INC AJY AT&T COMMUNICATIONS OF NEW YORK INC AYK AT&T COMMUNICATIONS OF OHIO INC AOH AT&T COMMUNICATIONS OF PACIFIC NORTHWEST INC APF AT&T COMMUNICATIONS OF PENNSYLVANIA INC APY AT&T COMMUNICATIONS OF THE SOUTHERN STATES INC ASU AT&T COMMUNICATIONS OF THE SOUTHWEST INC AOW AT&T COMMUNICATIONS OF VIRGINIA INC AVA AT&T COMMUNICATIONS OF WASHINGTON DC INC AWD WASHINGTON, DC AT&T COMMUNICATIONS OF WEST VIRGINIA INC AWV AT&T COMMUNICATIONS OF WISCONSIN INC AWI AT&T COMMUNICATIONS-INTERSTATE DIVISION ATI AT&T CONTRACT SERVICES IPS ATLANTA, GA AT&T CORP. (PREV. NORTHPOINT COMMUNICATIONS, FIM SAN FRANCISCO, CA INC) AT&T EASYLINK SERVICES WUT MAHWAK, NJ AT&T INFORMATION SYSTEMS LABORATORY ISL DENVER, CO AT&T OF PUERTO RICO APR ATLANTA, GA AT&T OF VIRGIN ISLANDS AVI ATLANTA, GA AT&T WIRELESS SERVICES AWL PARAMUS, NJ AT&T WIRELESS SERVICES OF CALIFORNIA INC (PREV CSU FAIRFIELD, CA CONSTITUTION CELL)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–21 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AT&T WIRELESS SERVICES, INC. (PREV. MCCAW MWZ KIRKLAND, WA COMMUNICATIONS-MSI DIV) AT&T WIRELESS SERVICES, INC. SUB. (PREV NORTHERN PIG REDMOND, WA ARKANSAS CELL.) AT&T WIRELESS SERVICES, INC.(PREV. MCCAW MCZ KIRKLAND, WA CELLULAR COMM. INC) ATCALL, INC. AAO ARLINGTON, VA ATCHISON TOPEKA AND SANTA FE RAILWAY CO (THE) ATF KANSAS CITY, KS ATCI INC. CANADA HOLDINGS, INC AHI ETOBICOKE, ON ATD COMMUNICATIONS, LTD. DMZ NEW YORK, NY A-TECH TELECOM OF VIRGINIA, INC. EVA PLANO, TX A-TECH TELECOM, INC. ECH PLANO, TX ATH COMMUNICATIONS DBA CALL AMERICA CAR SANTA ANA, CA ATHENA INTERNATIONAL L.L.C. AHQ NEW ORLEANS, LA ATHENA INTERNATIONAL LLC(PREV. ULTIMATE ULM BOULDER, CO COMMUNICATIONS CORP) ATHENS BUSINESS COMMUNICATIONS ATB THE PLAINS, OH ATHENS MOBILE PHONE AHS ATHENS, OH ATI TELECOM INC. AQV CORONA, NY ATL COMMUNICATIONS ALF ALAMEDA, GA ATLANTIC CELLULAR COMPANY, L.P. DBA LONG AUL COLCHESTER, VT DISTANCE BY CELLULAR ONE ATLANTIC CONNECTIONS LTD ACZ TRAVERSE CITY, MI ATLANTIC CONNECTIONS, INC AOF WORCESTER, MA ATLANTIC DIGITAL AIG ANN ARBOR, MI ATLANTIC GATEWAY TELECOM, INC AJG ROYAL PALM BEACH, FL ATLANTIC MEDIA, INC. AFM LAUREL, MD ATLANTIC TELECOM CORPORATION AXB BALA CYNWYD, PA ATLANTIC TELECOMMUNICATION SYSTEMS, INC. AYA WEST PALM BEACH, FL ATLANTIC TELE-NETWORK CO AWO ST THOMAS, VI ATLANTIC TELEPHONE INC AQT DAYTONA BEACH, FL ATLANTIC TELEPHONE MEMBERSHIP CORPORATION AQK SHALLOTTE, NC ATLANTIC TELESIS GROUP,INC. AQG YONKERS, NY ATLANTIC.NET BROADBAND, INC. AFJ GAINVESVILLE, FL ATLAS COMMUNICATIONS AQU SPRINGFIELD, MS ATLAS COMMUNICATIONS, LTD AAY BLUE BELL, PA ATLAS EQUITY, INC., DBA PERFORMANCE TELECOM PTY NEWPORT BEACH, CA ATLAS RADIOPHONE ALR ATLAS SECURITY INC ASY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–22 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ATNT AZQ CUMBERLAND, MD ATO SERVICES CORP AOV BISHOP, CA ATS AQS PLEASANT HILL, CA ATS MOBILE TEL INC AMB ATS SERVICES, LLC. ERV PROSPECT HEIGHTS, IL ATS TELECOMMUNICATIONS SYSTEMS, INC. AJT THE WOODLANDS, TX ATS TELEPHONE & DATA SYSTEMS INC ASZ MEMPHIS, TN ATT RADIOTELEPHONE CORP AZR STATEN ISLAND, NY ATT-IS AIS SYSTEM 1000 AIF SOMERSET, NJ ATU LONG DISTANCE AUI ANCHORAGE, AK ATX TELECOMMUNICATIONS SERVICES, LTD(PREV ATX ATZ PHILADELPHIA, PA EASY ACCESS LONG) AUBURN TELECOM LTD AUN FRESNO, CA AUDIOCOM ELECTRONICS INC AII SPOKANE, WA AUDITEL, INC ADB NORTH HOLLYWOOD, CA AUGLINK COMMUNICATIONS, INC. UGK ST. AUGUSTINE, FL AURA COMMUNICATIONS, INC. URA DURHAM, NC AURASERV COMMUNICATIONS, INC. AYJ ENGLEWOOD, CO AURORA/ELGIN CELLULAR TELEPHONE CO INC AEC WEST ATLANTIC CITY, NJ AUS INC AUU BETHESDA, MD AUSTIN BESTLINE ABN AUSTIN, TX AUSTIN COMMUNICATIONS SYSTEMS AUY AUSTIN, TX AUSTIN COMPUTER ENTERPRISES, INC AJU YONKERS, NY AUSTIN PAGING INC APG AUSTIN TELECO U.S.A., INC. AYU AUSTIN, TX AUTO PAGE AUG LEVELLAND, TX AUTO PERFECTION DBA FIVE STAR ENTERPRISES FSE ODESSA, TX AUTO PHONE AUH YUMA, AZ AUTOFONE INC AUF AUTOMATED DATA SYSTEMS INC UDY MICHIGAN CITY, IN AUTOMATED TELECOM AUV PALM DESERT, CA AUTOMOBILE CLUB OF SOUTHERN CALIFORNIA ACB LOS ANGELES, CA AUTOMOTIVE EXPERTS GROUP, INC. DBA BEND DATA UEX BEND, OR CENTER AUTOPAGE INC AUP TEXARKANA, TX AUTO-PHONE CO AUT AUTOPHONE OF GAINESVILLE INC ATG AUTOPHONE OF LAREDO, INC ALO LAREDO, TX AUTOPHONE OF SAN ANTONIO INC ASA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–23 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location AUTOPHONE OF VIDALIA ATV AUTOTEL AUO LAS VEGAS, NV AUTUMN COMMUNICATIONS, INC. AUX SAN ANTONIO, TX AVANA COMMUNICATIONS CORPORATION AJV ATLANTA, GA AVANTIS NY GERNERAL PARTNERSHIP STY SCHAUMBURG, IL AVATAR TELECOM, INC. VRE BEVERLY, MA AVERA COMMUNICATION, L.L.C. VEA SIOUX FALLS, SD AVIRNEX COMMUNICATIONS GROUP AVR LARKSPUR, CA AVISTA COMMUNICATIONS, INC (PREV AVISTA FIBER, VFB SPOKANE, WA INC) AVISTA COMMUNICATIONS, INC (PREV ONE EIGHTY OEH SPOKANE, WA COMMUNICATIONS, INC) AVIX TELECOM SOLUTIONS INC AZH TAMPA, FL AVONTEL, INC. VON FAIRFAX, VA AWESOME PAGING INC AWS VICTORIA, TX AWZ CELLULAR CORP. AZY HOUSTON, TX AX TELECOMMUNICATIONS, INCORPORATED XTI FAIRFAX, VA AXCES INC AXQ HOUSTON, TX AXCESSNETWORKS LLC XCK LONGVIEW, TX AXISTEL INTERNATIONAL INC AXH JERSEY CITY, NJ AXSYS, INC. XSY MOBILE, AL AXXENT CORP (PREV OPTEL COMMUNICATIONS CORP) OPI TORONTO, ON AXXIS COMMUNICATION INC XXS HOOD RIVER, OR AXXIS COMMUNICATIONS AXS SPRINGDALE, AR AZCOM PAGING INC AZO TUCSON, AZ AZTEC COMMUNICATION AZT B & B COMMUNICATIONS BBC DEL RIO, TX B & B MOBILE COMM BBM MEXIA, TX B & B TRANSATLANTIC OCEAN CABLE, INC. BBT SD, CA B & S TELECOM, INC. DBA MI QUICK CONNECT BSW LANSING, MI B.C.P. INC BPI ABELENE, TX B.R. COMMUNICATIONS BRR ABILENE, TX BABY GRAND CORP BGC BACHTEL CELLULAR LIQUIDITY LP BHT PHILADELPHIA, PA BACKBONE COMMUNICATIONS INC BCO LOS ANGELES, CA BAE COMMUNICATIONS INC BAE MOUNT VERNON, OH BAIR COMMUNICATIONS BIR BAKER PROTECTIVE SERVICE INC BPS BAKERSFIELD CELLULAR BAK BAKERSFIELD, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–24 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BALDPATE METROCOMMUNICATIONS INC BMC ESTES PARK, CO BALDWIN CELLCOM, INC. BWC BALDWIN, WI BALLARD RULAL TELEPHONE COOPERATIVE BDO LA CENTER, KY CORPORATION BALTIMORE GAS & ELECTRIC BGE BALTIMORE, MD BALTIMORE-WASHINGTON TELEPHONE BWT PIKESVILLE, MD BAND COMMUNICATIONS BDC BAND-X BDX MANHATTAN, NY BANK OF AMERICA BOA SAN FRANCISCO, CA BARAGA TELEPHONE COMPANY BRG BARAGA, MI BARNSTABLE TELECOM, INC BBX BARNSTABLE, MA BARR TELL USA, INC. BAA LONG BEACH, NY BARRY COUNTY TELEPHONE COMPANY BOU DELTON, MI BARTEC TELECOMMUNICATIONS BOM DALLAS, TX BARTEL COMMUNICATIONS, INC. BTA ST LOUIS, MO BARTS LD GROUP BAR FT WORTH, TX BASCOM LONG DISTANCE BCG BASCOM, OH BASICPHONE, INC. BSE BEAUMONT, TX BASIN 2 WAY RADIO INC BIN BIG SPRING, TX BASIN COMMUNICATIONS BSN BASIN COMMUNICATIONS INC BNC BATTLES COMMUNICATIONS INC BLS DEXTER, MO BAXLEY RADIO TELEPHONE SERVICES BRT BAY ANSWERPHONE BAS BAY AREA CELLULAR ONE BAO OAKLAND, CA BAY AREA CELLULAR TELEPHONE CO BAC SAN ROMAN, CA BAY AREA MEDICAL EXCHANGE BME ST. PETERSBURG, FL BAY AREA TELEPORT BAT ALAMEDA, CA BAY COMMUNICATIONS BAY FALL RIVER, MA BAY COMMUNICATIONS COMPANY BYA PANAMA CITY, FL BAY SPRINGS LONG DISTANCE, INC. BGT MONROE, LA BAY SPRINGS TELEPHONE COMPANY INC BYE BAY SPRINGS, MS BAY STAR SATELLITE PAGING BYS HOUSTON, TX BAY TELECOM BYT FRESNO, CA BAY TNT NETWORK BYN KENNEDALE, TX BAYCOMM INC. BYM PAOLI, PA BAYFONE OF TAMPA DBA AT&T WIRELESS SERVICES CZB TAMPA, FL BAYLAND COMMUNICATIONS, INC. BYO ABRAMS, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–25 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BAYNET, INC. BNE ABRAMS, WI BBC COMMUNICATION SERVICES BBV HOUSTON, TX BBG COMMUNICATIONS, INC. BBG SAN DIEGO, CA BBH CORP. BBH AURORA, ME BBIS COMMUNICATIONS, INC. BBY MARBLEHEAD, MA BC 1-800 MARKETING BCK VANCOUVER, BC BC TEL BCX BURNABY, BC BC TEL SYSTEMS SUPPORT, INC. BCE BURNABY, BC BCCMMEX, INC. DBA FREEDOM PAGE-FREEDOM FPE LEONARDTOWN, MD CELLULAR BCE NEXXIA CORPORATION BNX TORONTO, ON BCI & CLT, LLC DBA NEXTGEN COMMUNICATIONS BGO CLEAR LAKE, WI BCS COMMUNICATIONS INC BCZ CHICAGO, IL BD WEBB ENTERPRISE, INC. DBA QUAD CITY BDW TAMPA, FL COMMUNICATIONS BEAUTY TOWN, INC., DBA ANNS COMMUNICATIONS BYW TALLAHASSEE, FL BEAUZILE DEVEREUX COMMUNICATIONS, LTD BDV NEW YORK, NY BEAVER CREEK COOPERATIVE TELEPHONE COMPANY BVP OREGON CITY, OR BEAVER HEAD ELECTRONICS BVH BEAVERHEAD ELECTRONICS BHD DILLON, MT BEC COMMUNICATIONS INC BEC NEW YORK CITY, NY BECKER BKR CHICAGO, IL BEE LINE LONG DISTANCE BLE SALT LAKE CITY, UT BEE MOBILRADIO BMO BEECH RIDGE TELEMETRY, INC. BHR BECKLEY, WV BEEHIVE TELEPHONE CO INC BHV WENDOVER, UT BEEP BPP YORK, PA BEEP BEEP SUNCOAST INC BBS COCOA, FL BEEP CALIFORNIA INC BEP SAN DIEGO, CA BEEP COMMUNICATIONS BPC BEEP COMMUNICATIONS SYSTEMS INC BCS BEEP WEST INC BPW GLENWOOD SPRINGS, CO BEEP-ALERT OF KENTUCKY BKY LEXINGTON, KY BEEPCALL BCL SYRACUSE, NY BEEPER 1 BIP TEMPE, AZ BEEPER CITY, INC. BPY LAS VEGAS, NV BEEPER CO (THE) BQP DALLAS, TX BEEPER EXPRESS DE PUERTO RICO INC BPE SAN JUAN, PR BEEPER SERICE OF TULSA BST

Proprietary — Licensed Material See proprietary restrictions on title page. 8–26 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BEEPER SERVICE INC BSI BEEPER STREET INC T/A ALL PAGE BSA PARLIN, NJ BEEPERMART, INC. BPM MICHIGAN CITY, IN BEEPERS ETC BPR TAHLEQUAH, OK BEEPLES, INC. BES OKEMOS, MI BELENOS BLH MILTON, MA BELL AIR COMMUNICATIONS BEA SPOKANE, WA BELL ATLANTIC COMMUNICATIONS (PREV. BELL BAD ARLINGTON, VA ATLANTIC LONG DISTANCE) BELL ATLANTIC COMMUNICATIONS INC DBA VERIZON BAX ARLINGTON, VA LONG DISTANCE BELL ATLANTIC COMMUNICATIONS INC. BLX ARLINGTON, VA BELL ATLANTIC COMMUNICATIONS, INC. (PREV. NY-NJ NNC ARLINGTON, VA CORRIDOR CO.) BELL ATLANTIC COMMUNICATIONS, INC.(PREV. PJC ARLINGTON, VA PENNSYLVANIA-JERSEY COR) BELL ATLANTIC DIRECTORY SERVICES, INC. BAV BETHESDA, MD BELL ATLANTIC INC BAL PHILADELPHIA, PA BELL ATLANTIC INFOSPEED BAI NORFOLK, VA BELL ATLANTIC INTERNET SOLUTIONS, INC. BLI RESTON, VA BELL ATLANTIC NETWORK SERVICES, INC. BAW SILVER SPRING, MD BELL ATLANTIC PAGING BLG PARSIPPANY, NJ BELL ATLANTIC PLUS BAU ARLINGTON, VA BELL ATLANTIC TELEPRODUCTS CORP BAB EXTON, PA BELL ATLANTIC VIDEO SERVICES BEI GREENBELT, MD BELL ATLANTICOM SYSTEMS INC BLA PRINCETON, NJ BELL ATLANTIC-TRICON LEASING CORP BTR PARAMUS, NJ BELL CANADA BED MONTREAL, PQ BELL COMMUNICATIONS INC BLL FORT WORTH, TX BELL MOBILITY CELLULAR, INC. BMY ONTARIO, CN BELL PAGING CO. BLP LOS ANGELES, CA BELL WEST INC. (PREV BELL INTRIGNA INC) ING EDMONTON, AB BELLAIRE ROAD AUTO PARTS, INC. BRP CLEVELAND, OH BELLCOM BLM NUTLEY, N. BELLFAX INC BEX NEW YORK, NY BELLSOUTH BSE, INC. BBE ATLANTA, GA BELLSOUTH BUSINESS SYSTEMS BSU ATLANTA, GA BELLSOUTH BUSINESS SYSTEMS (PREV BELLSOUTH BSO ATLANTA, GA TELECOMMUNICATIONS)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–27 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BELLSOUTH CELLULAR BCU MOBILE, AL BELLSOUTH COMMUNICATIONS NETWORK BSH BELLSOUTH INTERNATIONAL ACCESS, INC. BIL ATLANTA, GA BELLSOUTH LONG DISTANCE BSL ATLANTA, GA BELLSOUTH MOBILITY INC BSM NASHVILLE, TN BELLSOUTH PERSONAL COMMUNICATIONS BPN ATLANTA, GA BELLSOUTH SERVICES BSS BIRMINGHAM, AL BELLSOUTH TELECOMMUNICATIONS, INC.- ALEC BEN ATLANTA, GA BELSAVE TELECOMMUNICATIONS BLT GLENSIDE, PA B-E-M SYSTEMS INC BEM BEN LOMAND COMMUNICATIONS, INC. BNL MCMINNVILLE, TN BEND CABLE DATA SERVICES LLC. BCB BEND, OR BENEFICIAL DATA PROCESSING CORP BDP PEAPACK, NJ BENGAL COMMUNICATIONS INTERNATIONAL, INC. BDS GREENBELT, MD BENKELMAN TELEPHONE CO., INC. BEK BENKELMAN, NE BENNETT COMMUNICATIONS BNT FLINT, MI BENTLEYVILLE TEL CO BYI BENTLEYVILLE, PA BERKSHIRE CABLE CORP. BCA KINDERHOOK, NY BERKSHIRE COMMUNICATIONS BCM BERMUDA DIGITAL COMMUNICATIONS LTD BDI HAMILTON, BM BEST CHOICE LONG DISTANCE COMPANY INC CKM CASCADE, IA BEST TELECOM LTD BTK ISLANDIA, NY BEST WESTERN PARKWAY CENTER INN BWP BESTEL (USA) INC BUI DOWN TOWN LAREDO, TX BESTLINE TAS BLN BESTWEB CLEC LTD. BWB CROTON-ON-HUDSON, NY BETA TELE - PAGE INC BTP TYLER, TX BETHANY COLLEGE INC BET BETHANY, WV BETHANY TELCOM BHY PLANO, TX BETTER ANSWER BAN BETTER BEEP (A) BEE SAN LUIS OBISPO, CA BETTER BEEPERS INC BBP BETTER WORLD TELECOM, INC. BWD RESTON, VA BEVCOMM, INC. BEV BLUE EARTH, MN BEVERLY SERVICE COMPANY BVS DALLAS, TX BEV-R ENTERPRISES INC T/A TOUCHTONE BRE UNION, NJ COMMUNICATIONS BEXAR COMMUNICATIONS INC BRC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–28 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BFI COMMUNICATION, INC. BFI SAN DIEGO, CA BGLO INTERNATIONAL INC BGI WOODLAND HILLS, CA BIDDEFORD INTERNET CORP. BDF BIDDEFORD, ME BIG APPLE PAGING CORP BGA PLAINVIEW, NY BIG COUNTRY COMMUNICATIONS BCC COEUR D’ALENE, ID BIG PLANET, INC. BPL PROVO, UT BIG SKY BEEPER BSB BIG SKY TELECOM, INC. BSY BASIN, WY BILAN COMMUNICATIONS, INC. BIA MONROE, MI BINGHAMTON CELLULAR CO BGH BINGHAMTON, NY BIRCH HILL LIMITED BHI VIENNA, VA BIRCH TELECOM OF THE SOUTH, INC. BUH KANSAS CITY, MO BIRCH TELECOM, INC. BHC KANSAS CITY, MO BIRCH TELECOM, INC. (PREV VALU LINE OF KANSAS) VLK EMPORIA, KS BIS-MAN MOBILE PHONE, INC BMM BISMARCK, ND BI-STATE TELEPHONE INC BIS FENWICK ISLAND, DE BI-TEC COMPANY, INC. BIM FORT WAYNE, IN BITEK INC BTI LONG BEACH, CA BITEX INTERNATIONAL INC BIT BITRO TELECOMMUNICATIONS INC BTO LOS ANGELES, CA BITWISE COMMUNICATIONS INC BIW PEORIA, IL BIXBY TELEPHONE CO BXY BIXBY, OK BIXBY TELEPHONE LONG DISTANCE CO BXT BIXBY, OK BIXBY TELEPHONE SALES & SERVICE CO. BXS BIXBY, OK BIZ TEL (CALIFORNIA CO) BZT SAN JOSE, CA BIZ TEL LONG DISTANCE TELEPHONE CO BIZ BIZTRANS TECHNOLOGY, INC. BZE SPRINGFIELD, VA BJB ENTERPRISES INC BJB BKC TELECOMMUNICATIONS, INC. BKC SAN MARCOS, TX BLACK HILL CELLULAR TELEPHONE CO BHL RAPID CITY, SD BLACK HILLS FIBERCOM BHF TOWN AND COUNTRY, MO BLACK MTN COMMUNICATIONS BLK BLYTHE, CA BLACK WORLD TELECOMMUNICATIONS BLW SLIVER SPRING, MD BLACKFOOT TELEPHONE, INC BFT MISSOULA, MT BLACKHAWK COMMUNICATIONS INC BCI BARABOO, WI BLANTON-YATES COMMUNICATIONS BYC NORTH MYRTLE BEACH, SC BLC COMMUNICATIONS BLC GRAND BLANC, MI B-LEC, INC. BLZ NEW HYDE PARK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–29 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BLEDSOE TELEPHONE COOPERATIVE BDE PIKEVILLE, TN BLINK DATA CORP BDA ROCHELLE PARK, NJ BLOOMINGDALE COMMUNICATIONS, INC. BIG BLOOMINGDALE, MI BLOOMINGDALE TELEPHONE COMPANY, INC. BDL BLOOMINGDALE, MI BLOUNTSVILLE TELEPHONE COMPANY BTY BLOUNTSVILLE, AL BLUE CROSS OF WESTERN PENNSYLVANIA INC BCW PITTSBURGH, PA BLUE RIBBON RENTALS II, INC. DBA TALK ONE AMERICA BIE CUHAHOGA FALLS, OH BLUE SKY COMMUNICATIONS USA, INC. BYL ALPHARETTA, GA BLUE VALLEY TELECOMMUNICATIONS, INC. BVQ HOME, KS BLUEGRASS CELLULAR BLU ELIZABERHTOWN, KY BLUEGRASS LONG DISTANCE, INC. BLD LEXINGTON, KY BLUEGRASS TELECOM, LLC BGL ELIZABETHTOWN, KY BLUERIVER COMMUNICATIONS, INC. BVM SALEM, IN BLUESTAR NETWORKS, INC. BWI NASHVILLE, TN BLUEWATER COMMUNICATIONS CORPORATION BWA FORT LAUDERDALE, FL BMI INC BMI ITAACA, IL BOARD WATER LIGHT & SINKING FUND COMM. DBA BWF DALTON, GA DALTON UTILITIES BOBIER ELECTRONICS BEL BOCA MOBILEPHONE BMP BOEING COMPUTER CO BCP BOK FINANCIAL CORPORATION BOK TULSA, OK BOLIN COMMUNICATION SYSTEMS BOL TEXARKANA, TX BOND ELECTRONICS BOD ZEPHYRHILLS, FL BONE COMMUNICATIONS INC BON EDNA, TX BONNEVILLE POWER ADMINISTRATION BPA BONNEVILLE SATELLITE CORP BSC BONNEVILLE TELECOMMUNICATION CORP BNV BOOKER COMMUNICATIONS BKM ALCESTER, SD BOOMERANG COMMUNICATIONS, INC. BOG TAMP, FL BORDERCOMM INC BDR EL PASO, TX BORDERLAND COMMUNICATIONS, LLC BLO NIAGARA, WI BORGER AIR PAGE INC BAP BORINQUEN BEEPERS INC BNB SAN JUAN, PR BOSTON COMMUNICATIONS GROUP INC BNG WOBURN, MA BOSTON TELECOMMUNICATION SERVICES BOR LYNN, MA CORPORATION BOULDER COMMUNICATIONS BOC BOULDER, CO BOULEVARD COMMUNICATIONS, L.L.P. BLR CRANBERRY, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–30 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BOYD LONG DISTANCE BYD DALLAS, TX BP OIL BPO CLEVELAND, OH BRAHMACOM, INC. BHM FORT LAUDERDALE, FL BRAHMS BRH KENNEDALE, TX BRAINARD TELECOM BRD BRAINARD, MN BRAMTEL BRM DALLAS, TX BRAND X INTERNET BXI SANTA MONICA, CA BRANDENBURG TELECOM LLC BDU BRANDENBURG, KY BRANNEN MOBILE TELEPHONE BMB BRANSON TELEPHONE BRN BRANSON, MO BRANTLEY TELEPHONE COMPANY, INC. BTD NAHUNTA, GA BRAVO CELLULAR, L.L.C. BOE RENO, NV BRAZORIA LONG DISTANCE BZD BRAZORIA, TX BRAZOS CELLULAR COMMUNICATIONS INC BRZ OLNEY, TX BRAZOS LONG DISTANCE BRL OLNEY, TX BRAZOSPORT TELEPHONE CO BZP LAKE JACKSON, TX BRE COMMUNICATIONS, L.L.C., D/B/A PHONE MICHIGAN PHG FLINT, MI BREDA TELEPHONE CORPORATION BDT BREDA, IA BREN CORP DBA TELE-BEEPERS BTB BRESNAN TELEPHONE OF MICHIGAN, LLC. BEH MARQUETTE, MI BRIDGEBAND COMMUNICATIONS, INC BBO BOZEMAN, MT BRIDGECOM INTERNATIONAL, INC (PREV BRIDGECOM BGM MOUNT KISCO, NY INTERNATIONAL, LLC) BRIDGEPOINT INTERNATIONAL BPT MONTREAL, PQ BRINDLEE MOUNTAIN TELEPHONE CO BDM ARAB, AL BRINDLLE MOUNTAIN TELEPHONE COMPANY BMT ARAB, AL BRISTOL BAY CELLULAR PARTNERSHIP BBK KING SALMON, AK BRITTAN COMMUNICATIONS INTERNATIONAL CORP. BCT HOUSTON, TX BROADBAND COMMUNICATIONS, INC BBN WINCHESTER, MA BROADBAND OFFICE COMMUNICATIONS INC BBI VIENNA, VA BROADBAND SERVICES CO BBD KNOXVILLE, TN BROADBAND SOLUTIONS, INC. BOB DENVER, CO BROADCAST MEDIA SATELITE, INC. BMS HATO REY, PR BROADPLEX, LLC BRX MORGANTON, NC BROADRIVER COMM CORP (PREV PUREPACKET COMM. PHH ALPHARETTA, GA OF THE SOUTH, INC) BROADRIVER COMM OF THE NORTHEAST CORP (PREV PUW ALPHARETTA, GA PUREPACKET COMM NE)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–31 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BROADRIVER COMM OF VIRGINIA CORP(PREV PUV ALPHARETTA, GA PUREPACKET COMM OF VA INC BROADRIVER COMMUNICATIONS COMPANY (PREV PUK ATLANTA, GA PUREPACKET COMM, INC) BROADSLATE NETWORKS, INC (PREV CARDINAL COMM, BRO CHARLOTTESVILLE, VA INC. -VA) BROADSPAN COMMUNICATIONS INC DBA PRIMARY BOS ST LOUIS, MO NETWORK COMM. INC BROADSTREAM CORPORATION BRA STAMFORD, CT BROADSTREET COMMUNICATIONS OF VIRGINIA, L.L.C. BRV CANONSBURG, PA BROADSTREET COMMUNICATIONS, INC. BRI CANONSBURG, PA BROADVIEW NETWORKS, INC (PREV COMMUNITY SCE LONG ISLAND CITY, NY NETWORKS, INC) BROADWING COMMUNICATIONS SERVICES INC (PRE IXC SSM AUSTIN, TX COMM. SERV. INC) BROADWING COMMUNICATIONS SERVICES INC (PREV IXC IXC AUSTIN, TX COMM. SERVICES) BROADWING LOCAL SERVICES INC. BWO CINCINNATI, OH BROADWING TELECOMM. INC (PREV CINCINNATI BELL CBD CINCINATTI, OH LONG DISTANCE) BROADWING TELECOMMUNICATIONS INC (PREV EAS AUSTIN, TX ECLIPSE TELECOM INC) BROADWING TELECOMMUNICATIONS INC (PREV WSN AUSTIN, TX ECLIPSE TELECOMM INC) BROADWING TELECOMMUNICATIONS INC (PRE ECLIPSE COS AUSTIN, TX TELECOMM, INC) BROADWING TELECOMMUNICATIONS INC (PREV CTO CINCINNATI, OH CINCINNATI BELL LONG DIST) BROADWING TELECOMMUNICATIONS INC (PREV LSP CINCINNATI, OH CINCINNATI BELL LONG DIST) BROADWING TELECOMMUNICATIONS INC (PREV UNL COLUMBUS, OH CINCINNATI BELL LONG DIST) BROADWING TELECOMMUNICATIONS INC (PREV ECLIPSE NNL AUSTIN, TX COMM) BROADWING TELECOMMUNICATIONS. INC (PREV CNK AUSTIN, TX ECLIPSE TELECOMM) BROOKINGS MUNICIPAL UTILITIES DBA SWIFTEL SIW BROOKINGS, SD COMMUNICATIONS BROOKS FIBER COMMUNICATIONS (PREV ADVANTAGE AZU GRAND RAPIDS, MI COMMUNICATIONS GROUP) BROOKS FIBER COMMUNICATIONS (PREV. BITTEL BTL GRAND RAPIDS, MI TELECOMMUNICATIONS)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–32 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BROOKS FIBER COMMUNICATIONS OF TEXAS, INC(PREV MAI IRVING, TX METRO ACCESS) BROOKS FIBER COMUNICATIONS OF NEVADA,INC(PREV PFI FOLSOM, CA PHOENIX FIBERLINK) BROOKS FIBER PROPERTIES ( PREV. BROOKS FIBER BFC SACRAMENTO, CA COMMUNICATIONS, INC) BROOKS FIBER PROPERTIES(PREV. CITY SIGNAL INC.) CYG GRAND RAPIDS, MI BROOKS FIBER PROPERTIES, INC. BFP TOWN & COUNTRY, MO BROOKSIDE TELEPHONE CO INC BKS ARLINGTON, TX BROWN SERVICE CO BVC DALLAS, TX BROWNIE COMMUNICATIONS CORP DBA ICLD(PREV ASJ DELRAY BEACH, WI ATLAS COMM.& TELEPHONE) BRUCE R BECKER BRB BRUCE TELECOMMUNICATIONS, LLC BUM BRUCE, WI BRUCE TELEPHONE COMPANY, INC. BEO BRUCE, MS BRUMFIELD NETWORK COMMUNICATIONS BRU OAKLAND, CA BRYAN 800 COMMUNICATIONS INC BRY BRYAN, TX BRYANT SERVICE BYV EULESS, TX BRYANT’S WIRELESS SERVICES, INC. BWE BEAUFORT, SC BT GLOBAL NETWORKS LIMITED BTG ATLANTA, GA BT NORTH AMERICA INC BTN SAN JOSE, CA BT TELECOM, INC. BTQ WOODBRIDGE, NJ BTC COMMUNICATIONS, INC. BTU BLOOMER, WI BTC INC BTW BREDA, IA BTC LONG DISTANCE, INC. BDN BLOUNTSVILLE, AL BTI TELECOMMUNICATIONS SERVICES (PREV. EWT RALEIGH, NC ECONOWATS) BTM ENTERPRISES, INC. BEZ JEFFERSON, MA BUCKEYE TELESYSTEM, INC. TOV TOLEDO, OH BUDGET CALL LONG DISTANCE INC BUC SAN MARCOS, TX BUDGET COMM, LLC BUA DONALSONVILLE, GA BUDGET CORP BUD BENTON HARBOR, MI BUDGET PHONE INC. BGP SHREVEPORT, LA BUDGET TELEPHONE BTT SEATTLE, WA BUDGET TELEPHONE ANSWERING SERVICE BUT BENTON HARBOR, MI BUDGET-TELEPHONE INC BDG DURANGO, CO BUD-NORTH SHORE INC BNS SANTA BARBARA, CA BUFFALO TELEPHONE CO BFL BUFFALO, NY BUFFALO VALLEY TELEPHONE COMPANY BVT LEWISBURG, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–33 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location BUGGS ISLAND TELEPHONE COOPERATIVE BUG BRACEY, VA BUILDING COMMUNICATIONS, INC. BIC THREE RIVERS, MI BULLOCH COUNTY RURAL TELEPHONE COOPERATIVE, BOH STATESBORO, GA INC. BULLSEYE TELECOM, INC. BUL SOUTHFIELD, MI BUREAU 21 INC BUU EL MONTE, CA BURLINGTON-NORTHERN BNN BURNO, INC. DBA CITYWIDE-TEL. BUW ORLANDO, FL BUSINESS AUTO PHONE INC BHN TAZEWELL, VA BUSINESS COMMUNICATIONS BMN DES MOINES, IA BUSINESS COMMUNICATIONS INC BUS BUSINESS COMMUNICATIONS NETWORK INC BCN DENVER, CO BUSINESS DISCOUNT PLAN DBA LD DISCOUNT PLAN BSD LONG BEACH, CA BUSINESS LONG DISTANCE BSG READING, MA BUSINESS PHONES BSP HERNDON, VA BUSINESS RADIO INC BSR KENNEWICK, WA BUSINESS RADIO SALES & SERVICE INC BRS CORALVILLE, IA BUSINESS SERVICE CENTER INC BSV WAUSAU, WI BUSINESS SERVICES BY CELLULAR ONE (PREV ECLIPSE EEC BELLEVUE, WA COMM. CORP) BUSINESS TECHNOLOGY SERVICES INC BTV MIAMI, FL BUSINESS TECHNOLOGY SYSTEMS, INC BTH POMPANO BEACH, FL BUSINESS TELECOM INC BTM RALEIGH, NC BUSINESS TELECOM INC (PREV LASSMAN WEBER COMM) LWC MEDFORD, OR BUSINESS TELECOMMUNICATIONS CORP BTC BUSINESS TELECOMMUNICATIONS SERVICES, INC. BUV MIAMI, FL BUSINESS TELEPHONE SYSTEM INC BTS BUSINESSNET TELECOM, INC. BEU MIAMI, FL BUTTE COUNTY CELLULAR LICENSE CORPORATION BCY FAIRFIELD, CA BUYERS UNITED INTERNATIONAL, INC. BUN DRAPER, UT BUYPASS BYP ATLANTA, GA BUY-TEL COMMUNICATIONS, INC BUY COLLEYILLE, TX BW TELECOM BWL BENKELMAN, NE BZAAT COMMUNICATIONS BZA QUEBEC, CN C & C COMMUNICATIONS OF NEW MEXICO CNX C & I COMMUNICATIONS CZI COOKEVILLE, TN C & L COMMUNICATIONS INC LCQ SAN ANTONIO, TX C & P TELEPHONE CO OF MARYLAND CPY BALTIMORE, MD C C ENTERPRISES CQQ DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–34 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location C L T COMMUNICATIONS, INC. LCH CLEAR LAKE, WI C P NATIONAL (AMERICAN NETWORK) CPN PORTLAND, OR C&C COMMUNICATIONS CCC C&K INVESTMENTS INC CKI C&W COMMUNICATIONS INC CWC C&W DATAAMERICA CWA FAIRFAX, VA C.1.COM INC (PREV FUNDY CABLE LTD) FDY SAINT JOHN, NEW BRUNSWICK, CN C.B. TELECOMM, INC. ELQ PINELLAS, FL C.C.I. COMMUNICATION SPECIALISTS, INC. CJK ROSEVILLE, CA C1 COMMUNICATIONS OCH MISSISSAUGA, ON C-1 COMMUNICATIONS, INC. OUC EMILY, MN C2C FIBER, INC FIE HOUSTON, TX C3 COMMUNICATIONS, INC. OUI AUSTIN, TX CA PAGING CGF OAK PARK, MI CABLE & WIRELESS CWI VIENNA, VA CABLE & WIRELESS COMMUNICATIONS (FMLY TDX TDX VIENNA, VA SYSTEMS) CABLE & WIRELESS TELECOMMUNICATIONS CWR MISSISSAUGA, ON CABLE AND WIRELESS INTERNATIONAL CWL MC CLEAN, VA CABLE AND WIRELESS MANAGEMENT SERVICES CBW CABLE ATLANTIC ABV ST JOHN’S, NF CABLE PLUS MANAGEMENT, INC. CFM BELLEVUE, WA CABLEVISION LIGHTPATH INC CBV WOODBURY, NY CACTUS COMMUNICATIONS INC CSC CACTUS INC CAC CADETELCO,LLC DBA ALL STATES TELEPHONE CO AQD COLORADO SPRINGS, CO CAGAL CELLULAR COMMUNICATIONS CORP CGA OAKLAND, CA CAGLE COMMUNICATIONS INC CGL CAIS INTERNET AZK WASHINGTON, DC CAL AUTOFONE CAU CALAVERAS TELEPHONE CO CVR COPPEROPOLIS, CA CAL-COM RADIO TEL CDO EL CENTRO, CA CALCOM RADIO TELEPHONE CAM CALDWELL COMMUNICATION INC LLU ALBUQUERQUE, NM CALIFORNIA 9 CELLULAR CORP CLF SAN FRANCISCO, CA CALIFORNIA INTELECOM CORP II CFI CALIFORNIA STATE LOTTERY CYZ SACRAMENTO, CA CALIFORNIA-OREGON TELEPHONE COMPANY CFE DORRIS, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–35 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CALL AMERICA BULLHEAD CBH RIVIERA, AZ CALL AMERICA GROUP CRA MARSHFIELD, WI CALL AMERICA INC CAA CALL AMERICA LONG DISTANCE CGJ JACKSONVILLE, FL CALL AMERICA MONTANA CMQ BOZEMAN, MT CALL COMMUNICATIONS CCY CALDWELL, TX CALL FOR LESS CJF OSHAWA, ON CALL FOR LESS LONG DISTANCE CFX ARLINGTON, TX CALL HOME AMERICA CLH AUSTIN, TX CALL MOBILE CBB LEXINGTON, KY CALL SAVE CSV CALL SAVER CSQ WILMINGTON, NC CALL SAVERS OF FRESNO CSF FRESNO, CA CALL SCIENCES, INC LLE EDISON, NJ CALL TECHNOLOGY CORP OF PHILA CTG ARDMORE, PA CALL US CORP CUD SAN JUAN, PR CALL US OF KENTUCKY CUK CALL USA CLU POCATELLO, ID CALL USA (DALLAS) CUA DALLAS, TX CALL-AMERICA MILLER HILLIER CMH FAIRFIELD, AK CALL-AMERICA OF BAKERSFIELD CBR SANTA ANA, CA CALL-AMERICA OF FRESNO CAF FRESNO, CA CALL-AMERICA OF PALM DESERT CPD PALM DESERT, CA CALL-AMERICA OF RIVERSIDE CRV RIVERSIDE, CA CALL-AMERICA OF SAN DIEGO CDG SAN DIEGO, CA CALL-COMMUNICATIONS INC CCO CALL-EX INTERNATION INC CLX CALLING CARD COMPANY, INC. CLJ ENGLEWOOD CLIFFS, NJ CALLMANGE INC LLM STAMFORD, CT CALLNET COMMUNICATIONS, INC. AZF DALLAS, TX CALL-O-CALL INC LOK NEW YORK, NY CALLPAGE INC CLL CALLUM LONG DISTANCE CUJ DALLAS, TX CAL-NORTH CELLULAR LNL YREKA, CA CAL-ONE CELLULAR L P COQ FORT JONES, CA CALTECH INTERNATIONAL TELECOM CORPORATION CJJ WALNUT CREEK, CA CALTEL LONG DISTANCE LEG COPPEROPOLIS, CA CAL-VADA MICROWAVE INC CLV SACRAMENTO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–36 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CAM COM CAX GILLETE, WY CAMACHO COMMUNICATIONS CORPORATION MHU SACRAMENTO, CA CAMARATO DISTRIBUTING, INC MRB HERRIN, IL CAMBRIAN COMMUNICATIONS LLC AYX FAIRFAX, VA CAMBRIDGE TELCOM SERVICES, INC MBD GENESEO, IL CAMDEN MOBLE COMMUNICATIONS INC CMB CAMERON LONG DISTANCE CAO SULPHUR, LA CAMERON TELEPHONE COMPANY AKF SULPHUR, LA CAM-NET INC CNZ SEATTLE, WA CANAVERAL COMMUNICATIONS CAV CANBY TELEPHONE ASSOCIATION NBY CANBY, OR CANCALL COMMUNICATIONS, INC. AUJ NEWARK, NJ CANNECT COMMUNICATIONS, INC. AQF VANCOUVER, BC CANNON COMMUNICATIONS CORPORATION CDB RED WING, MN CANNON MOBILE PHONE INC CPH CANOPCO INCORPORATED NPO ONTARIO, CN CANTON CELLULAR CNU COLUMBUS, OH CANTOR FITZGERALD SECURITIES CORP CFS NEW YORK, NY CAP ROCK TELECOMMUNICATIONS CKO SPUR, TX CAPE FEAR PAGING COMPANY OF NORTH CAROLINA PFP RALEIGH, NC CAPITAL ANS SERVICE CPT CAPITAL COMMUNICATIONS COOPERATIVE CZP MANASSAS, VA CAPITAL NETWORK SYSTEM INC (SUB OF AMNEX, INC) CAQ ORLANDO, FL CAPITAL TELECOM OF MARYLAND CPZ CAPITAL TELECOMMUNICATIONS INC CPL CAPITAL TELEPHONE CO INC CAT CAPITOL RADIO TELEPHONE CPR CHARLESTON, WV CAPROCK CELLULAR LIMITED PARTNERSHIP CKL LUBBOCK, TX CAPROCK COMMUNICATIONS CCK HOBBS, NM CAPROCK COMMUNICATIONS (PREV. SYNERGY SGY DALLAS, TX TELEMANAGEMENT INC.) CAPROCK FIBER NETWORK LTD CKF DALLAS, TX CAPROCK RADIO DISPATCH CPK CAPSULE COMMUNICATIONS, INC. (PREV US WATS) UWT BENSALEM, PA CARA COMMUNICATIONS COMPANY RUC GILBERT, AZ CARAWAY COMMUNICATIONS, INC. CQJ DALLAS, TX CARD ESTABLISHMENT SERVICES INC CEB SIOUX FALLS, SD CARD TEL CDT FT LAUDERDALE, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–37 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CARDINAL COMMUNICATION CORP. CDM MONTICELLO, KY CARIB COMM, L.P. CBP MIAMI, FL CARIBBEAN AUTOMATED LONG LINES SERVICES CAD ST THOMAS, VI CARIBBEAN INTERNET SERVICE, CORP. RIB SAN JUAN, PR CARIBBEAN TELECOMMUNICATIONS CBQ NEW YORK, NY CARIBBEAN TELECOMMUNICATIONS CONSORTIUM, MUE SAN FRANCISCO, CA INC(PREV MULTIMEDIA) CARIBBEAN TELEPHONE & TELEGRAPH INC CIB DEARBORN, MI CARIBE COMMUNICATIONS AND TELEPHONE, INC. CBF SAN JUAN, PR CARIBSAT TELECOMMUNICATIONS INC. (PREV. COMSERV CVZ SAN JUAN, PR TELECOM. INC.) CARICALL COMMUNICATIONS, INC AKK MIAMI, FL CARLOS V LANGSTON CVL CARMODY’S RADIO PAGING SERVICE INC CPG CARNEGIE-MELLON UNIVERSITY INC CGM PITTSBURGH, PA CAROLINA BROADBAND, INC. RBR CHARLOTTE, NC CAROLINA METRONET CNN RALEIGH, NC CAROLINA PCS I LIMITED PARTNERSHIP RPP GREENVILLE, SC CARONET, INC CEV RESEARCH TRIANGLE PARK, NC CAROTEL, LLC RLL ROCK HILL, SC CARR COMMUNICATIONS INC RRN BRANCH, MI CARRERA COMMUNICATIONS, L.P. RRA SAN ANTONIO, TX CARRIER COMMUNICATIONS CRE LANCASTER, CA CARRIER ONE INC RON ZURICH, SZ CARRIER PAGING SYSTEMS INC CIR WEST BABYLON, NY CARRIER SERVICES CORP CVI PORT ORANGE, FL CARRIER SERVICES CORP (PREV VALU LINE OF VOB PORT ORANGE, FL BRENHAM) CARRIERCOM CORPORATION RCB MCALLEN, TX CAR-TEL COMMUNICATIONS INC CCN CASCADE ACCESS LLC SAX ESTACADA, OR CASCADE NETWORK CORP CNC CASCADE TELEPHONE COMMUNICATIONS CCD CASCO COMMUNICATIONS, INC. SOX PHILOMATH, OR CASS LONG DISTANCE, INC. SGS VIRGINIA, IL CASSCOM INC AJN ROCHESTER HILLS, MI CASTLEBERRY TELEPHONE COMPANY AHF CASTLEBERRY, AL CAT COMMUNICATIONS INTERNATIONAL INC AYN ROANOISE, VA CATHY PAGING INC CYP WICHITA, KS

Proprietary — Licensed Material See proprietary restrictions on title page. 8–38 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CATSKILLS COMMUNICATIONS INC. KIL MARGARETVILLE, NY CAVALIER TELEPHONE, LLC VLR GRAND RAPIDS, MI CAYUGA TELEPHONE COMPANY CYH SYRACUSE, NY CBEYOND COMMUNICATIONS, LLC BYG ATLANTA, GA CC COMMUNICATIONS (PREV CHURCHILL COUNTY CUH FALLON, NV TELEPHONE) CC&H INC CAH PLANO, TX CCC COMMUNICATIONS CORP (PREV MIDWEST MDW CAPE CORAL, FL TELEPHONE SERVICE) CCG GCQ CLEAR SPRING, MD CCI COMET COM INC EOI SAN DIEGO, CA CCI COMMUNICATIONS CRG ATLANTA, GA CCI PR RSA, INC. CXB GUAYNABO, PR CCIC CIJ DALLAS, TX CCL TELECOMMUNICATIONS, INC. LTO CEDAR KNOLLS, NJ CCN CJN WASHINGTON, DC CCO TELECOM INC OTO KANSAS CITY, MO C-COM (PREV. C & G ASSOCIATES) CGZ BOULDER, CO C-COMM, INC. OMM WINCHESTER, VA CCT (CALIFORNIA CATALOG & TECHNOLOGY) CFG LODI, CA CDS NETWORKS, INC DEW MEDFORD, OR CEDAR COMMUNICATIONS, LLC ERO CLARENCE, IA CEDAR FALLS UTILITIES CFJ CEDAR FALLS, IA CELEBRATE COMMUNICATIONS, L.L.C. EBE GENESEO, IL CELECT COMMUNICATIONS, LLC. EES SPRING VALLEY, WI CELFON INC CFN ATLANTA, GA CELINA TELECOM CIA CELINA, OH CELL CALL NETWORK CWW LEXINGTON, KY CELL SOUTH CSO TRENTON, NJ CELLCO PARTNERSHIP DBA VERIZON WIRELESS PREV EBA DBA B ATL MOBILE BEDMINSTER, NJ CELLCOM CXZ GREEN BAY, WI CELLNET CELLULAR SERVICE CVX BEACHWOOD, OH CELLNET COMMUNICATIONS CORPORATION CJE AURORA, CO CELLPAGE CKA AZUSA, C CELLTEL SYSTEMS INC CQY EDEN PRAIRIE, MN CELLTOLL CORP CXL GLENDALE, CA CELLULAR 29 CVQ LINCOLN, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 8–39 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CELLULAR COMMUNICATIONS CEM DULUTH, MN CELLULAR CONNECTION CEW PALMDALE, CA CELLULAR INFORMATION SYSTEMS INC CIF ENGLEWOOD, CO CELLULAR LINK, INC. UAK SAN JOSE, CA CELLULAR LONG DISTANCE COMPANY CGD KIRKLAND, WA CELLULAR MOBILE SERVICE CSZ HUSTON, TX CELLULAR NETWORK PARTNERSHIP LNP KINGFISHER, OK CELLULAR OF INDIANA CIW VINCENNES, IN CELLULAR OF UPSTATE NEW YORK INC CJW DELMAR, NY CELLULAR ONE CLQ COLUMBIA, SC CELLULAR ONE CZO BECKLEY, WV CELLULAR ONE - FINGER LAKES TELEPHONE CO (FMLY PCK ITHACA, NY PCM INC) CELLULAR ONE (CELLUDYNE LL) CDY CANON CITY, CO CELLULAR ONE GREAT LAKES OF IOWA CQW SPENCER, IA CELLULAR ONE KALAMAZOO CKZ KALAMAZOO, MI CELLULAR ONE OF AUSTIN CUO AUSTIN, TX CELLULAR ONE OF BERRIEN COUNTY COB ST JOSEPH, MI CELLULAR ONE OF BROOKINGS CUB BROOKINGS, SD CELLULAR ONE OF CHARLESTOWN -RSA 6 CCF N CHARLESTON, SC CELLULAR ONE OF CHICO COH CHICO, CA CELLULAR ONE OF CLINTON CQI CLINTON, IA CELLULAR ONE OF DANVILLE CDL DANVILLE, IL CELLULAR ONE OF GREATER FORT WAYNE CFT FORT WAYNE, IN CELLULAR ONE OF GREENWOOD CUG GREENWOOD, SC CELLULAR ONE OF MACON GEORGIA CGO FT MEYERS, FL CELLULAR ONE OF MARION AND HUNTINGTON CHQ MARION, IN CELLULAR ONE OF MID SOUTH TEXAS CXA EL CAMPO, TX CELLULAR ONE OF NORFOLK CQR NORFOLK, NE CELLULAR ONE OF NORTHEAST GEORGIA CGE GAINESVILLE, GA CELLULAR ONE OF ORANGE COUNTY COG NEWBURGH, NY CELLULAR ONE OF PHILADELPHIA EOP WAYNE, PA CELLULAR ONE OF ROCKFORD CRF DANBURY, CT CELLULAR ONE OF SIOUX FALLS CFL SIOUX FALLS, SD CELLULAR ONE OF SOUTHEAST KENTUCKY CKE CORBIN, KY CELLULAR ONE OF SOUTHWEST FLORIDA FLA FORT MYERS, FL CELLULAR ONE OF SOUTHWEST OKLAHOMA CKQ WICHITA FALLS, TX CELLULAR ONE OF STAUNTON CNV STAUNTON, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–40 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CELLULAR ONE OF THE ILLINOIS VALLEY CIV LA SALLE, IL CELLULAR ONE OF TRI-STATE CTJ GREENSBORO, NC CELLULAR ONE OF TYLER CYL TYLER, TX CELLULAR ONE OF WICHITA FALLS COW WICHITA FALLS, TX CELLULAR ONE OF WILLIAMSPORT CWP GREENSBORO, NC CELLULAR ONE WASHINGTON/BALTIMORE WBT HANOVER, MD CELLULAR ONE WILMINGTON/BALTIMORE CWB GREENBALT, MD CELLULAR PACIFIC CPF HONOLULU, HI CELLULAR PLUS CUP WILKES-BARRE, PA CELLULAR RADIO SERVICE CRS CELLULAR RENTALS, INC. CKB HARRISBURG, PA CELLULAR SERVICE INC CZV GLENDALE, CA CELLULAR TECHNOLOGY INC (PREV LSS CELLULAR LSS LUBBOCK, TX LUBBOCK) CELLULAR TELEPHONE CO OF TOLEDO CEZ SOUTHFIELD, MI CELLULAR TELEPHONE COMPANY DBA AT&T WIRELESS CEU ROCHELLE PARK, NJ SERVICES CELLULAR VENTURES INC CVN WEST BLOOMFIELD, MI CELLULAR XL ASSOCIATES, L.P. DBA CELLULAR ONE EUO HATTIESBURG, MS CELLULARONE OF SHELBY CBY SHELBY, NC CELLULINK CIK APPLETON, WI CELLUPHONE OF TEXAS EET DALLAS, TX CELLUTEL CEL TUCEON, AZ CELLWAVE INC CZW CLEVELAND, OH CEL-NET I COMMUNICATIONS, INC. DOO FLUSHING, NY CELTRONICS PAGING CPJ DALLAS, TX CELUTEL INC CUE MC ALLEN, TX CENCALL COMMUNICATIONS CORP CXU DENVER, CO CENCOM, INC. EMA JACKSON, NE CENDANT MEMBERSHIP SERVICES, INC. ENM STAMFORD, CT CENTANA RADIO COMMUNICATIONS CNR CENTEL COMMUNICATIONS,INC ELU GOLDENDALE, WA CENTEL NETWORK COMMUNICATIONS INC CEQ CHICAGO, IL CENTENNIAL CELLULAR CORP (PREV CENTURY CUY NEPTUNE, NJ CELLULAR CORP) CENTENNIAL COMMUNICATIONS, INC. CJA SAN JUAN, PR CENTENNIAL FLORIDA SWITCH CORP. EFW NEPTUNE, NJ CENTERCOM ARKANSAS L.P. CQK BARTLESVILLE, OK CENTEX TELECOMMUNICATIONS INC CEN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–41 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CENTRAL ANSWERING AND PAGING CAP MONROE, MI CENTRAL ARKANSAS TELEPHONE COOPERATIVE, INC. EAL BISMARCK, AR CENTRAL CELLULAR, INC. EEU DAVENPORT, OK CENTRAL COAST TELEPHONE CLZ CENTRAL COMMUNICATIONS CTR CENTRAL COMMUNICATIONS INC CCU CENTRAL COMMUNICATIONS NETWORK, L.C. ESE KANAWHA, IA CENTRAL DELIVERY SERVICE OF WASH INC CDS CENTRAL LINES CRQ FAIRMONT, MN CENTRAL LINK OF MARLIN CEK MARLIN, TX CENTRAL LINK SATELLITE PAGING CKG WACO, TX CENTRAL LINK SYSTEMS CKS WACO, TX CENTRAL MOBILE & PAGING CNP CENTRAL MOBILE RADIO CMR CENTRAL MOBILE RADIO PHONE SERVICE CTL CENTRAL MOBILEFONE CMF CENTRAL MOBILPHONE CMP CENTRAL NEW YORK TALK TRANSIT CTK CORTLAND, NY CENTRAL OFFICE CONSULTANTS COF PROVO, UT CENTRAL OKLAHOMA TELEPHONE CO. EOK DAVENPORT, OK CENTRAL OREGON CELLULAR, INC. CXH SALT LAKE CITY, UT CENTRAL PAGING INC CTP CHAMPAIGN, IL CENTRAL PAYPHONE SERVICES, INC. CYV ROSWELL, GA CENTRAL RADIO DISPATCH INC CRD CENTRAL RADIO TELEPHONE CTE CENTRAL RADIOPHONE CRP CENTRAL STATES MICROWAVE TRANSMISSION CO CWE HARRISONVILLE, MO CENTRAL TELEMESSAGING SERVICES INC CGG BEND, OR CENTRAL TELEPHONE CO CXE PLANO, TX CENTRAL TELEPHONE SYSTEMS CLY FARGO, ND CENTRAL TEXAS COMMUNICATIONS, INC. CJX GOLDTHWAITE, TX CENTRAL TEXAS TECHNOLOGIES, L.P. EAX AUSTIN, TX CENTRAL UTAH COMMUNICATIONS, L.C., DBA WRLD EUC FAIRVIEW, UT ALLIANCE CENTRAL UTAH TELEPHONE EUH KERRVILLE, TX CENTRAL VERMONT COMMUNICATIONS EVC RUTLAND, VT CENTRAL WIRELESS PARTNERSHIP EIP GLENDALE, CA CENTRAL WISCONSIN COMMUNICATIONS DBA WCTC WCY WISCONSIN RAPIDS, WI LONG DISTANCE

Proprietary — Licensed Material See proprietary restrictions on title page. 8–42 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CENTREX COMMUNICATIONS INC CXC CENTREX TELEMANAGEMENT INC CXT SAN FRANCISCO, CA CENTURION CED CAPE CHARLES, VA CENTURY CELLUNET CRY TEXARKANA, TX CENTURY CELLUNET CYC LANSING, MI CENTURY COMMUNICATIONS CXQ DALLAS, TX CENTURY COMMUNICATIONS CORP CEY NEW CANAAN, CT CENTURY ENTERPRISES, INC. ENN CANTON, IL CENTURY LONG DISTANCE(PREV. CENTURY AREA LONG CAL LA CROSSE, WI LINES) CENTURY NETWORK INC CYN SALT LAKE CITY, UT CENTURYTEL MICHIGAN NETWORK, L.L.C. EMN MONROE, LA CENTURYTEL OF THE MIDWEST-WISCONSIN, INC. EMW LA CROSSE, WI CENTURYTEL SERVICE GROUP, LLC EVG MONROE, LA CENTURYTEL SOLUTIONS, LLC. ENY MONROE, LA CEO TELECOMM, INC. (SUB OF STAR TELE.) (PREV L D LSE SANTA FE SPRINGS, CA SERVICES INC) CEO TELECOMMUNICATIONS, INC (SUB OF STAR TELE.) SPE DALLAS, TX (PREV SPECTRANET CESCOM ESQ MONTREAL, QC CFR CORPORATION CFR CFW CELLULAR, INC. CFQ WAYNESBORO, VA CF-W TELEPHONE CFW WAYNESBORO, VA CGH CELLULAR CORP OF PENNSYLVANIA CGH NEW YORK, NY CGI CGQ CAPE CORAL, FL CGM, L.L.C. GMJ ROSWELL, GA CHALLENGER CONSTRUCTION, INC. CGX QULIN, MO CHALLENGER NETWORK INC CZR SLIDELL, LA CHAMPLAIN TELEPHONE CO HMN CHAMPLAIN, NY CHAMPLAIN VALLEY TELECOM INC HVT WAITSFIELD, VT CHANDLER COMMUNICATIONS, INC. HMI BIG BEAR LAKE, CA CHAPEL SERVICES INC HPS RICHMOND, KY CHARITON VALLEY L.D. CORPORATION CVD BUCKLIN, MO CHARLES EDWARD CROWLEY CEC CHARLES L SLOCUM CLS CHARLES R BRALEY III CRB WASHINGTON, DC CHARLES R. WELLS HRW GARDEN GROVE, CA CHARLES ROTKIN (DBA- NORTHEAST COMMUNICATIONS) CRN CHARLOTTE AXS CHX CHARLOTTE, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–43 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CHARTER FIBERLINK, LLC HFB ST. LOUIS, MO CHASE TELECOM CHA HARTFORD, CT CHASE TELECOMMUNICATIONS INC HLI NASHVILLE, TN CHASETEL COMMUNICATIONS HSM NASHVILLE, TN CHAUTAUQUA & ERIE COMMUNICATIONS, INC. CHH WESTFIELD, NY CHAUTAUQUA TELESAVER CQT DUNKIRK, NY CHAWILLA CHW CHAYCE ‘N’ YOU CNY CHECKRITE CKR CORPUS CHRISTI, TX CHEQUAMEGON TELECOMMUNICATIONS COMPANY, INC. HEC CABLE, WI CHEQUAMEGON TELEPHONE COOPERATIVE, INC. CJH CABLE, WI CHERNOW COMMUNICATIONS INC CCI CHERRY COMMUNICATIONS CHY DOWNERS GROVE, IL CHESAPEAKE TELECOMMUNICATIONS CORPORATION HSP WARSAW, VA CHESNEE LONG DISTANCE INC HSD CHESNEE, SC CHESTER LONG DISTANCE SERVICES INC CHR CHESTER, SC CHEYENNE RIVER SIOUX TRIBE TELEPHONE AUTHORITY HSX EAGLE BUTTE, SD CHIBARDUN TELEPHONE COOPERATIVE, INC. CJP DALLAS, WI CHICAGO COMMUNICATION SERVICE INC CHG FRANKLIN PARK, IL CHICAGO FIBER OPTIC CORP CFO CHICAGO, IL CHICKAMAUGA TELEPHONE CORPORATION HKU BAY SPRINGS, MS CHICKASAW LONG DISTANCE CO CHK SULPHUR, OK CHICKASAW PERSONAL COMMUNICATIONS CKW SULPHUR, OK CHICKASAW TELECOMMUNICATIONS SERVICES, INC. HTS SULPHUR, OK CHICO TELECOM CHC FRESNO, CA CHILITECH INTERNET SOLUTIONS, INC. HIU WILLIAMSPORT, PA CHILL CELLULAR CORPORATION CEJ NEW YORK, NY CHILLICOTHE TELEPHONE CO HLT CHILLICOTHE, OH CHIM CHIMNEY CHIMNEE SWEEP INC CHI WEST BLOOMFIELD, MI CHINESE MEDIA GROUP, LLC CJV SAN MATEO, CA CHIPPEWA VALLEY COMMUNICATIONS, INC. (PREV. NSP DURAND, WI NELSON TELEPHONE) CHOCTAW TELECOMMUNICATIONS LLC HCW HOUSTON, TX CHOICE 1 COMMUNICATIONS CHJ CLEVELAND, OH CHOICE INFO SYS CHO LAKEWOOD, CO CHOICE ONE COMMUNICATIONS HOC ROCHESTER, NY CHOICE PHONE LLC DBA ICONN ICB TUMON, GU CHOICE TELCO, LLC HOI HARTFORD, CT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–44 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CHOICE WIRELESS L.C. HEW MUENSTER, TX CHOICETEL, INC. HCE PLYMOUTH, MN CHORUS NETWORKS INC (PREV MID-PLAINS LONG MPQ MIDDLETON, WI DISTANCE) CHR TELECOMMUNICATIONS NRQ WOODSIDE, NY CHRISTINE LD SERVICE CHV WEST STOCKBRIDGE, MA CHUBB GROUP OF INSURANCE COMPANIES CHB WARREN, NJ CHURCH TELEPHONE ANSWERING SVC CHT CI2, INC. IWO ATLANTA, GA CIERA NETWORK SYSTEMS, INC (PREV EQUALNET ADX HOUSTON, TX CORPORATION) CIERA NETWORK SYSTEMS, INC (PREV EQUALNET EQN HOUSTON, TX CORPORATION) CIERA NETWORK SYSTEMS, INC (PREV EQUALNET TIE HOUSTON, TX CORPORATION) CIERA NETWORK SYSTEMS, INC (PREV EQUALNET USI HOUSTON, TX CORPORATION) CIERA NETWORK SYSTEMS, INC. IEK HOUSTON, TX CIGNAL COMMUNICATIONS CIG METARIRIE, LA CIGNAL GLOBAL COMMUNICATIONS CARRIER SERVICES, IGC CAMBRIDGE, MA INC. CIMA TELECOM, INC (PREV INTERDATA IDQ MIAMI, FL COMMUNICATIONS) CIMARRON TOWERS INC CXW OKLAHOMA CITY, OK CIMCO COMMUNICATIONS INC. COJ OAKBROOK TERRACE, IL CINCINNATI BELL MESSAGING SERVICES CBM CINCINNATI, OH CINCINNATI BELL TELEPHONE COMPANY CBZ CINCINNATI, OH CINCINNATI BELL WIRELESS, LLC IBW CINCINNATI, OH CINCINNATI RADIO TELEPHONE CRT CINERGY COMMUNICATIONS COMPANY (PREV OLP EVANSVILLE, IN COMMUNITY TELEPHONE CORP) CINGULAR WIRELESS LLC IUW ATLANTA, GA CIRRO GROUP, INC. IUP PLANO, TX CITADEL SOFTWARE, INC. ILW BROOKVILLE, IN CITIBANK (NY NY) CBN NY, NY CITIBANK (S DAKOTA N A ) CTB SOUIX FALLS, SD CITIDEL COMMUNICATIONS SYSTEMS CIC SAN DIEGO, CA CITILINK OF UTAH, LLC CKH WEST JORDAN, UT CITISTREAM COMMUNICATIONS, INC. IIR LINCOLN, NE CITIWISE COMMUNICATIONS, L.L.C. LCW SOUTH ORANGE, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–45 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CITIZEN PHONE, INC. IZP HALEYVILLE, AL CITIZENS COMMUNICATIONS (PREV CITIZENS TELECOM) CZX DALLAS, TX CITIZENS COMMUNICATIONS (PREV CITIZENS CZJ DALLAS, TX TELECOMMUNICATIONS CO.) CITIZENS COMMUNICATIONS (PREV FLEX FLX DALLAS, TX COMMUNICATIONS SYSTEM) CITIZENS LONG DISTANCE CO. CZF MAMMOTH, PA CITIZENS LONG DISTANCE CO. (PREV. CITIZENS CZE REDDING, CA UTILITIES) CITIZENS LONG DISTANCE COMPANY (MO) IOG HIGGINSVILLE, MO CITIZENS LONG DISTANCE, INCORPORATED IZL HAMMOND, NY CITIZENS MUTUAL TELEPHONE CO (PREV CITIZENS CFH BLOOMFIELD, IA COMMUNICATION CO) CITIZENS SYSTEM CZN CELINA, OH CITIZENS TELECOMMUNICATIONS COMPANY IZI PLANO, TX CITIZENS TELEPHONE COMPANY IZE BREVARD, NC CITIZENS TELEPHONE COMPANY OF KECKSBURG IKK MAMMOTH, PA CITIZENS TELEPHONE COOPERATIVE CJZ FLOYD, VA CITIZENS TELEPHONE COOPERATIVE, INC. CKJ NEW AUBURN, WI CITY CAL CYA PRAIRIE DU CHIEN, WI CITY OF ABILENE CBE ABILENE, TX CITY OF CARTERSVILLE IYV CARTERSVLLE, GA CITY OF ELGIN EGN ELGIN, IL CITY OF LAKELAND IYA LAKELAKE, FL CITY OF NEWNAN & NEWNAN WATER, SEWERAGE & IWN NEWNAN, GA LIGHT COM DBA NEWNAN .. CITY OF PORTLAND DBA INTEGRATED REGIONAL IYP PORTLAND, OR NETWORK ENTERPRISE CITY OF THOMASVILLE TVY THOMASVILLE, GA CITY SIGNAL COMMUNICATIONS, INC. (PREV CITY SIGNAL IYS STRONGSVITLE, OH COMM., L.L.C.) CITY TELECOM INC. CIY SCARBOROUGH, ON CITY WIDE PAGING CDF WOODLAND HILLS, CA CITY-LINK COMMUNICATIONS IYL SALT LAKE CITY, UT CITYNET COMMUNICATIONS INC CYU WEST BLOOMFIELD, MI CITYNET TELECOM, INC. IYT SILVER SPRING, MD CITY-WIDE ELECTRONICS CWD FRESNO, CA CJD WISCONSIN CELLULAR CORP CJD FAIRFIELD, CA CL TEL LONG DISTANCE, INC.(PREV. CLEAR LAKE CKP CLEAR LAKE, IA INDEPENDENT TEL. CO)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–46 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CLAIRCOM COMMUNICATIONS CRJ SEATTLE, WA CLARIONIP.COM LIC ATLANTA, GA CLARITY TELECOM LOCAL NETWORK SERVICES, INC. LNW MILFORD, CT CLARK COMMUNICATIONS CZK LEWISTON, ID CLARK FORK TELECOMMUNICATIONS, INC. LRF MISSOULA, MT CLARKE MOBILEPHONE AND PAGING INC CPP CLARKS TELECOM LONG DISTANCE CO. LLG CLARKS, NE CLARKS TELECOMMUNICATIONS LRK CLARKS, NE CLARKSDALE MOBILEPHONE CKD CLAY COUNTY RURAL TELEPHONE CO-OPERATIVE INC. LAY CLOVERDALE, IN CLEAR COMMUNICATIONS GROUP CXR ATLANTA, GA CLEAR NETWORK, INC. DBA CLEARNET CKN SANTA MONICA, CA CLEAR RATE COMMUNICATIONS INC LRI OAK PARK, MI CLEAR WORLD COMMUNICATIONS CORP LEA SANTA ANA, CA CLEARLAKE COMMUNICATIONS CLK CLEARNET COMMUNICATIONS INC CJM PICKERING, ON CLEARPOP INC. LOP WILMINGTON, DE CLEARSOURCE, INC. LUE AUSTIN, TX CLEARTALK LRL GRAND JUNCTION, CO CLEARTEL COMMUNICATIONS CRZ WASHINGTON, DC CLEARWORKS.NET, INC. LRW HOUSTON, TX CLEC COMMUNICATIONS CORP LUN PEAR RIVER, NY CLEVELAND MOBILE TELCO OF NJ CVE CLEVELAND MOBILE TELEPHONE INC CLE CLEVELAND PCS LLC LPQ INDEPENDENCE, OH CLIFTON PHONE SYSTEM CFP CLEVELAND, OH CLIMAX TELEPHONE COMPANY LMT CLIMAX, MI CLOSECALL AMERICA, INC LRS CHESTER, MD CLS SERVICES INC. LSV INDEPENDENCE, OH CMC TELECOM, INC. CQF FARMINGTON HILLS, MI CMG TELECOMMUNICATIONS, INC MGM NASHUA, NH CMS (CELLULAR MOBILE SYSTEMS OF ST. CLOUD) CBJ ST. CLOUD, MN CMS COMMUNICATIONS, L.L.C. CJS CLIMAX, MI CMT PARTNERS DBA CELLULAR ONE CXV OVERLAND PARK, KS C-NET COMMUNICATIONS (PREV. CELLNET CVW MADISON HEIGHTS, MI TELECOMMUNICATIONS) CO SPACE SERVICES, LLC OSE SOMERVILLE, MA COALFIELDS TELEPHONE COMPANY INC OLF HAROLD, KY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–47 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COALINGA RADIO TELEPHONE COL COAST INTERNATIONAL INC CIZ OVERLAND PARK, KS COAST TO COAST TELECOMMUNICATIONS MWT CLARKSTON, MI COASTAL AUTOMATED COMMUNICATIONS CORP AUC NEW CASTLE, DE COASTAL AUTOMATED COMMUNICATIONS INC CMI WILMINGTON, DE COASTAL BAY COMMUNICATIONS, INC. CYI HOUSTON, TX COASTAL BEND COMMUNICATIONS INC CBC COASTAL CAROLINA COMMUNICATIONS INC CCA COASTAL COMMUNICATIONS CLC COASTAL INTERNET ACCESS, INC OAI NANTUCKET, MA COASTAL LONG DISTANCE SERVICES INC CZD HINESVILLE, GA COASTAL PAGING CORP COO MYRTLE BEACH, SC COASTCOM INC CCJ GARDEN CITY, SC COCHRANE CELLULAR, INC. (PREV COCHRANE OCE COCHRANE, WI COOPERATIVE TELEPHONE) COEUR D’ALENE ANSWERING SERVICE, INC. CVA SPOKANE, WA COEUR D’ALENE CELLULAR ONE CDA COEUR D’ALENE, ID COGECO CABLE INC OGE MONTREAL, PQ COLE T. DAVIS OTD CABOT, AR COLEMAN COUNTY TELECOMMUNICATIONS, INC. OCD SANTA ANNA, TX COLGAN COMMUNICATIONS CLG COLLECTIVE COMMUNICATIONS SERVICES INC. COV CONSHOHOOKEN, PA COLLEGE TOWN CLT BRAINTREE, MA COLLINS COMMUNICATIONS CLN COLLINS RADIO COMMUNICATIONS INC CRO COLO.COM OLO BRISBANE, CA COLONIAL ENTERPRISE INC CQL PANAMA CITY, FL COLORADO CITY LINK CYK KAYSVILLE, UT COLORADO HI-TEK INC CQH PAGOSA SPRINGS, CO COLORADO MOBILE COMMUNICATIONS CLR COLORADO RIVER COMMUNICATIONS CDR BULL HEAD CITY, AZ COLORADO VALLEY LONG DISTANCE OLV LA GRANGE, TX COLORADO WEST MOBILE PHONE CWM COLOTEL, LLC (PREV TELEHUB NETWORK SERVICES THB GURNEE, IL CORPORATION) COLUMBIA BEND CORPORATION CLB COLUMBIA CELLULAR INC CCB COLUMBIA, MO COLUMBIA COMMUNICATIONS INC. CBO KENNEWICK, WA COLUMBIA DIVERSIFIED SERVICES, INC. ODR RIVERDALE, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–48 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COLUMBIA PAGING CLP COLUMBIA TELECOMMUNICATIONS, INC. OTL BATON ROUGE, LA COLUMBIA TELEPHONE ANSWERING SERVICE CTA COLUMBUS PCS OLM INDEPENDENCE, OH COM CENTRAL COX TAMPA, FL COM NAV MARINE CNM JACKSON, MI COM NET, INC. OET DEFIANCE, OH COM SYSTEM NETWORK SERVICES OF ARIZONA CAZ PHOENIX, AZ COM SYSTEMS CYY WESTLAKE VILLAGE, CA COM SYSTEMS DBA SUNDIAL COMMUNCIATIONS SDC TUSAN, AZ COM2000 OCV SAN JOSE, CA COMANCHE COUNTY LONG DISTANCE CQG DELEON, TX COMANTEL INC CNQ FREDONIA, NY COMAV CORPORATION CVK BOSTON, MA COMBINED MARK INC CMM COMBINED NETWORK INC CNI COMBINED PAGING AND MOBILE CPM COMBINED TELCOM CBI COMBINED TELECOM INC OBT TORONTO, ON COMBINED XCHANGE TELECOM INC OXT WATERLOO, ON COMCAST BUSINESS COMMUNICATIONS INC OMQ PHILADELPHIA, PA COMCAST CABLEVISION OF VIRGINIA, INC (PREV JONES JCV ALEXANDRIA, VA COMM OF VA INC) COMCAST CELLULAR CSX PHILADELPHIA, PA COMCAST TELECOMMUNICATIONS, INC (PREV GBB BALA CYNWYD, PA GLOBALCOM TELECOMM. INC) COMCAST TELEPHONY COMMUNICATIONS HOLDINGS, OTM PHILADELPHIA, PA INC. COMCAST TELEPHONY COMMUNICATIONS OF OMD PHILADELPHIA, PA MARYLAND, INC. COMCELL, INC. OLL WINDTHORST, TX COMCOM INC - SAN DIEGO GNQ COMET COMMUNICATIONS INC COM COMEX (SAN FRAN) CMZ SAN FRAN, CA COMEX INC CMX COMINEX, L.L.C. CDJ EGG HARBOR TOWNSHIP, NJ COM-LINE CLI COMLINK USA CKU MISSION VIEJO, CA COMLINK, L.L.C. OMK OKEMOS, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–49 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COMLITE, INC. CKK NEW YORK, NY COMLOGIC, INC. OLG PRESTO, PA COMM NET SERVICES CORP CXY PLANO, TX COMM TECHS COMMUNICATIONS CTH TEXARKANNA, AR COMM. DEPOT, INC. OOT JACKSON, TN COMMAN TELEPHONE COU FREDONIA, NY COMMANDER SYSTEMS INC CSI COMMAR INC CRX SANTA ROSA, CA COM-MAR INC COZ MARSHALL, TX COMMCENTRAL INC DBA COMMCENTRAL OEA GRAND PRAIRIE, TX COMMCHOICE L.L.C. OMH DAKOTA DUNES, SD COMMCHOICE OF IOWA, LLC OIA DAKOTA DUNES, SD COMMERCE TWO-WAY RADIO CTW COMMERCIAL COMMUNICATIONS COMPANY CCP COMMERCIAL COMMUNICATIONS INC CER COMMERCIAL ENGINEERING SERVICES CES GRANT ISLAND, NE COMMERCIAL RADIO INC COR COMMITTED TELEPHONE SERVICES OTS EAST ORANGE, NJ COMM-KEY INC CKY COMMLINE PAGING SERVICE CQP LA GRANDE, OR COMMNET CELLULAR, INC. (PREV. CELLULAR, INC.) CLW ENGLEWOOD, CO COMMONWEALTH COMMUNICATIONS, INC (PREV. FBA FBA EMMAUS, PA AMERICA INC) COMMONWEALTH OF KENTUCKY KNY LEXINGTON, KY COMMONWEALTH OF PENNSYLVANIA CPA HARRISBURG, PA COMMONWEALTH TELCOM INC CWQ ENCINO, CA COMMONWEALTH TELECOM SERVICES INC (PREV CQV WILKES BARRE, PA COMMONWEALTH COMM. INC) COMMONWEALTH TELECOM, INC. COY ROWLETT, TX COMMONWEALTH TELECOMMUNICATIONS INC CNW COMMONWEALTH TELEPHONE COMPANY CMW DALLAS, PA COMMSOURCE INTERNATIONAL LLC OEN SAN RAFAEL, CA COMMSOUTH COMPANIES, INC OSO DALLAS, TX COMMTRONIX COMMUNICATIONS AND ELECTRONICS CXD LAKE VILLAGE, AR COMMUNICATION 1 CORP CVP BRONX, NY COMMUNICATION CABLE-LAYING COMPANY INC CAB SPRINGFIELD, MO COMMUNICATION CENTER INC CCR COMMUNICATION CONCEPTS INC. D/B/A VOICE-TEL CJB WELLESLEY HILLS, MA BOSTON

Proprietary — Licensed Material See proprietary restrictions on title page. 8–50 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COMMUNICATION DESIGN INC CDI PORTLAND, ME COMMUNICATION ELECTRONIC CENTER INC CET COMMUNICATION ENGINEERING COMPANY INC CME COMMUNICATION EXPERTS, INC. OEP LAS VEGAS, NV COMMUNICATION OPPORTUNITIES, INC. OMO BROOKLYN, NY COMMUNICATION SAVINGS INC. CVG MOBILE, AL COMMUNICATION SERVICES AMERICA CWN MOUNTAIN VIEW, CA COMMUNICATION SERVICES INTEGRATED, INC OSN CARROLLTON, GA COMMUNICATION SPECIALISTS, INC. OMS TEXARKANA, AR COMMUNICATION TECHNOLOGY INC MXY MIAMI, FL COMMUNICATION TRANSMITTING SERVICE CNG ANAHEIM, CA COMMUNICATIONS ALERT, INC. CAJ FT. WAYNE, IN COMMUNICATIONS ASSOCIATES CQN SPRINGFIELD, MS COMMUNICATIONS BROKERS & CONSULTANTS INC OBC CALABASAS, CA COMMUNICATIONS BUYING GROUP, INC. CYJ BEACHWOOD, OH COMMUNICATIONS CENTER INC CSR COMMUNICATIONS CENTER PAGE ONE POD CHARLESTON, WV COMMUNICATIONS CONNECTIONS CORP OF AMERICA CWU MINNEAPOLIS, MN COMMUNICATIONS CORP OF AMERICA CCZ PLYM MEETING, PA COMMUNICATIONS DESIGN CDE PORTLAND, ME COMMUNICATIONS ENGINEERING INC CEG COLORADO SPRINGS, CO COMMUNICATIONS EQUIPMENT & SERVICE INC OME FAIRBANKS, AK COMMUNICATIONS EQUIPMENT INC CPE INDEPENDENCE, MO COMMUNICATIONS INC CMU COMMUNICATIONS MAINTENANCE INC CIX INDIANAPOLIS, IN COMMUNICATIONS MANAGEMENT INC CMG GEORGETOWN, SC COMMUNICATIONS MARKETING CO CMC COMMUNICATIONS OPTIONS INC CPW NEWARK, OH COMMUNICATIONS OPTIONS INC MQI COLUMBUS, OH COMMUNICATIONS PARTNERSHIP INTERNATIONAL CIQ SAN FRANCISCO, CA COMMUNICATIONS PLUS, INC. OPJ MORGANTOWN, WV COMMUNICATIONS PROPERTIES INC COP MUSKOGEE, OK COMMUNICATIONS PROPERTIES, INC. CIH SPRINGDALE, AR COMMUNICATIONS RESALE CORP CRC COMMUNICATIONS SALES & SERVICE INC CSH WEATHERLAND, TX COMMUNICATIONS SATELLITE CORP CGC COMMUNICATIONS SERVICE COMPANY CVY ALAMOGORDO, NM COMMUNICATIONS SPECIALIST RADIO TELPAGE CZS DOTHAN, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–51 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COMMUNICATIONS SPECIALISTS CO INC CSP COMMUNICATIONS SPECIALISTS COMPANY CMS COMMUNICATIONS SPECIALISTS COMPANY (DAYTONA CMD BEACH) COMMUNICATIONS SPECIALISTS INC CSL COMMUNICATIONS SYSTEMS INTERNATIONAL, INC. CSJ COLORADO SPRINGS, CO COMMUNICATIONS SYSTEMS NETWORK SERVICES CSS COMMUNICATIONS TECHNOLOGY GROUP CYO ENGLWOOD, NJ COMMUNICATIONS TRANSMISSION INC (FMLY INRNATL IMR AUSTIN, TX MWV) COMMUNICATIONS UNLIMITED CIU DENVER, CO COMMUNICATIONS VENTURE CORPORATION DBA OVO NEW PARIS, IN INDIGITAL TELECOM COMMUNICATIONS VENTURES INC CVU SCOTTSDALE, AZ COMMUNICATIONS WEST CDW FORT BRAGG, CA COMMUNIGROUP INC CGI COMMUNIGROUP OF K.C., INC (PREV SHOW ME LONG SHW BLUE SPRINGS, MO DISTANCE INC) COMMUNIGROUP OF NORTH ALABAMA CGN COMMUNIQUE CO CQZ PALM HARBOR, FL COMMUNITEL INC CUN SAN FRANCISCO, CA COMMUNITRONICS INC CIT COMMUNITY ANSWERING SERVICE INC CAS COMMUNITY CABLE TV AGENCY - O’BRIEN CNTY DBA UBC SANBORN, IA CMNTY AGENCY & TCA COMMUNITY COMMUNICATIONS NETWORK, INC. OMW BURLINGTON, WI COMMUNITY INTERNET SYSTEMS, INC. OIY COLUMBUS, NE COMMUNITY LONG DISTANCE INC CYD ROCK HILL, SC COMMUNITY PAGING CORP CMY LEXINGTON, NE COMMUNITY TELEPHONE CUW MUSKEGAN, MI COMMUNITY TELEPHONE CORPORATION (PREV WRIGHT WRB OVERLAND PARK, KS BUSINESSES, INC) COMMUNITY TELEPHONE NETWORK INC CUQ LOS ANGELES, CA COMMUNIVERSE INC CUV MIAMI, FL COM-NAV D/B/A RADIO TELEPHONE MARINE CMN COMNET CNE PORTLAND, OR COMPANIA ANONIMA NACIONAL TELEFONOS DE OTV CARACAS 1010, VE VENEZUELA (CANTV) COMPASS COMMUNICATIONS CAW MUSCLE SHOALS, AL COMPASS TELECOMMUNICATIONS, INC OSS SCOTTSDALE, AZ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–52 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COMPATH NETWORK SERVICES INC CNS COMP-DATA COMMUNICATIONS CDC SAN ANTONIO, TX COMPETETIVE COMMUNICATIONS GROUP VCG CLEAR SPRING, MD COMPETITIVE COMMUNICATIONS INC MVN RIVERSIDE, CA COMPLETE BUSINESS SOLUTIONS INC OBO FARMINGTON HILLS, MI COMPLETE COMMUNICATIONS INC CZL ENID, OK COMPREHENSIVE COMMUNICATIONS SYSTEMS INC (NEW CCS NAME RTT) COMPUCONNECTION NETWORK CORPORATION DBA MHO ONH DENVER, CO NETWORKS COMPULINE INTERNATIONAL, INC. LII STATEN ISLAND, NY COMPUSALTANTS INC CPI COMPUSERVE CPQ COLUMBUS, OH COMPUSERVE INC CPS COMPUSWITCH CWH COMPUTE-A-CALL CUT SPRINGFIELD, MO COMPUTE-A-CALL INTERNATIONAL INC CMT SALT LAKE CITY, UT COMPUTEL INC CPU ADA, OK COMPU-TEL INC CUX SOUIX CITY, SD COMPUTER 5*, INC. DBA LOCALTEL LOJ EAST WENATHEE, WA COMPUTER ASSOCIATES INC CAI COMPUTER CONCEPTS CORPORATION CPC LENEXA, KS COMPUTER SCIENCES INC CIE EL SEGUNDO, CA COMPUTER SCIENCES INC ECO EL SEGUNDO, CA COMSAT CZA WASHINGTON, DC COMSAT GENERAL CORPORATION OGO BETHESDA, MD COMSAT INTERNATIONAL COMMUNICATIONS INC CIL WASHINGTON, DC COMSCAPE TELECOMMUNCIATIONS, INC. OAT COLUMBUS, OH COMSERV CORP CMV CAPPARRA HTS, PR COMSOUTH TELESERVICES, INC(PREV. CENTRAL CNB HAWKINSVILLE, GA TELECOM, INC) COMSTAR COMMUNICATIONS CST COM-TEC INC COT COMTECH 21, LLC. OEL WALLINGFORD, CT COMTECH INTERNATIONAL CHD SEATTLE, WA COMTECH NETWORK SYSTEMS GROUP INC CHZ ST LOUIS, MO COMTECH SOLUTIONS, L.L.C. OES GOLDEN, IL COMTECK OF INDIANA, INC OOI SWEETSER, IN COMTEL DEBIT TECHNOLOGIES LLC ODL LYNDHURST, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–53 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location COMTEL OF ARKANSAS CLA JONESBOROUGH, AR COMTEL OF CENTRAL ARKANSAS CAK MEMPHIS, TN COMTEL OF HOUSTON CHU HOUSTON, TX COMTEL OF PINE BLUFF INC CPB PINE BLUFF, AR COMTEL SOUTH CTS COMTEL STATES CORP TTB TAMPA, FL COMTEL SYSTEM OF BILLINGS CSB MONTANA, MT COMTEL SYSTEMS CII FAYETTEVILLE, AR COMTEL SYSTEMS CYS SPRINGDALE, AR COMTEL SYSTEMS INC CQX SPOKANE, WA COMTEL SYSTEMS OF MILWAUKEE CMK COMTEL SYSTEMS OF NORTHWEST ARKANSAS CNA SPRINGDALE, AR COMTEL SYSTEMS OF TULSA CTU TULSA, OK COMTEL TECH COD DALLAS, TX COMTEL TELECOMMUNICATIONS CEE MILWAUKEE, WI COMTELCO/TMC CFD KINGSPORT, TN COMTEX COMMUNICATIONS INC CJQ WAXAHACHIE, TX COMTEX CORPORATION OEX SEATTLE, WA COMTRONEX INC CTX COMVERSE MANAGED SERVICES OMF ALPHARETTA, GA COMVEST LONG LINES OF BAKERSFIELD CVB FRESNO, CA COMVEST LONG LINES OF CALIFORNIA CVF FRESNO, CA COMVEST LONG LINES OF MODESTO CVM FRESNO, CA COMVEST LONG LINES OF MONTEREY CLM FRESNO, CA COMVEST LONG LINES OF SACRAMENTO CVS FRESNO, CA COMVEST LONG LINES OF SANTA ANA CSA SANTA, CA COMVEST LONG LINES OF STOCKTON CSK FRESNO, CA COMVEST LONG LINES OF VISALIA CVV FRESNO, CA COMVEST NETWORK INC CVT FRESNO, CA COMVEST TELECOMMUNICATIONS INC CSN COMWEST COMMUNICATIONS CWS PHOENIX, AZ CONAGRA INC CAG OMAHA, NE CONCENTRIC NETWORK CORPORATION ONO CUPERTINO, CA CONCERT USA ONU BASKING RIDGE, NJ CONCHO CELLULAR TELEPHONE CO., INC. NHO PORT ARTHUR, TX CONCORD TELEPHONE LONG DISTANCE CO CND CONCORD, NC CONDOR COMMUNICATIONS INC. NCJ JAMACIA ESTATES, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–54 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CONECTIV COMMUNICATIONS (PREV DELMARVA POWER DLM NEWARK, DE & LIGHT CO) CONESTOGA COMMUNICATIONS INC (PREV NORTHERN NNN BIRDSBORO, PA COMM. INC) CONESTOGA MOBILE SYSTEMS INC CQM BIRDSBORO, PA CONESTOGA TELEPHONE AND TELEGRAPH CO. CVJ BIRDSBORO, PA CONETCO COMMUNICATIONS CORPORATION CWF NEW YORK, NY CONEXONE COMMUNICATIONS LLC OCU PASADENA, CA CONFERENCE CALL USA CFC CONFERENCE LINE SERVICES INC. CFY INDEPENDENCE, OH CONIFER COMMUNICATIONS LTD CSE VAIL, CO CONNECT AMERICA COMMUNICATIONS INC CQA SAN ANTONIO, TX CONNECT AMERICOM CORP CQB SAN ANTONIO, TX CONNECT COMMUNICATIONS CORPORATION DBA OHN LITTLE ROCK, AR CONNECT CONNECT COMMUNICATIONS CORPORATION DBA TOTAL OCP LITTLE ROCK, AR CONNECT CONNECT COMMUNICATIONS, LLC ONW HICKORY, NC CONNECT!LD, INC. OND LITTLE ROCK, AR CONNECT, LLC EON BIRMINGHAM, AL CONNECT/ONE COMMUNICATIONS INC COI HUDSON, OH CONNECTECH, L.L.C. DBA TELX DNH NEW YORK, NY CONNECTICUT BROADBAND, INC. OBB HARTFORD, CT CONNECTICUT TELEPHONE AND COMMUNICATIONS CJU WALLINGFORD, CT SYSTEMS, INC. CONNECTIVA COMMUNICATIONS CORPORATION OVU UNION CITY, IN CONNECTNET CXX AMARILLO, TX CONNECTSOUTH COMMUNICATIONS, INC (PREV IEV AUSTIN, TX ICONNECT CORP) CONNSPEC AG OPG VOITSBERG, AS CONQUEST COMMUNICATIONS CORP CQU COLUMBUS, OH CONQUEST LONG DISTANCE COMPANY CQD COLUMBUS, OH CONQUEST OPERATOR SERVICES CORP CQO DUBLIN, OH CONROE-COMTEL INC CCX COMROE, TX CONSOLIDATE TELEPHONE COOPERATIVE CSD DICKENSON, ND CONSOLIDATED COMMUNICATIONS NETWORKS, INC. OCK DICKINSON, ND CONSOLIDATED COMMUNICATIONS PUBLIC SERVICES CDZ MATTOON, IL CONSOLIDATED EDISON COMMUNICATIONS, INC. OED NEW YORK, NY CONSOLIDATED LONG DISTANCE, INC. OLE LINCOLN, NE CONSOLIDATED TECHNOLOGIES INC. CNJ VANCOUVER, BC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–55 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CONSORTIUM COMMUNICATIONS INC CRM CONSUMER DATA SOLUTIONS CDQ IRVING, TX CONSUMER HEALTH SERVICES INC CHE BOULDER, CO CONSUMER HELP SERVICES INC CHP BOULDER, CO CONSUMER TELCOM, INC. OUM HENDERSON, NV CONSUMERS TELEPHONE AND TELECOM, LLC OTP FAYETTEVILLE, NC CON-TAC COMMUNICATIONS INC CNT CONTACT AMERICA COA CHILLICOTHE, MO CONTACT COLORADO SPRINGS INC CCT CONTACT COMMUNICATIONS CCM CONTACT COMMUNICATIONS CZC MANHASSET, NY CONTACT COMMUNICATIONS INC CTI CONTACT COMMUNICATIONS INC(PREV. PRONET COC DALLAS, TX COMMUNICATIONS) CONTACT COMMUNICATIONS, INC. OAM SCOTTSDALE, AZ CONTACT CORP (GREELEY) CCG CONTACT DENVER CTD CONTACT INC CTT BALTIMORE, MD CONTACT NEW MEXICO INC CTM CONTACT OF EL PASO CEP CONTACT OF WASHINGTON INC CWT BALTIMORE, MD CONTACT PAGING CGB ALBUQUERQUE, NM CONTEL CELLULAR - NORFOLK CNF ATLANTA, GA CONTEL CELLULAR - RICHMOND CRH ATLANTA, GA CONTEL CELLULAR INC CCE FRESNO, CA CONTEL CELLULAR OF EL PASO INC CNL ATLANTA, GA CONTEL OF INDIANA CID SEYMOUR, IN CONTEL TELEPHONE OPERATIONS CHN SEYMOUR, IN CONTICOMM INC CIM ENGLEWOOD, CO CONTINENTAL DATA CENTER CEA NEPTUNE, NJ CONTINENTAL LONG DISTANCE CXO HACKESSIN, DE CONTINENTAL LONG DISTNACE CWG SPRING BRANCH, TX CONTINENTAL SWITCHING CORP CSW CEDAR HILL, TX CONTRACT COMMUNICATIONS INC CTC CONTROL NETWORK SYSTEM INC ONY STAFFORD, TX CONTROL TEL INC CON CONTROLLED ATMOSPHERE ENCLOSURES INC CAE CONTROLLED POWER CORPORATION OF OHIO DPB MASSILLON, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 8–56 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CONVERGENCE TELECOM GROUP, LLC. OVR NEW YORK, NY CONVERGENCE, INC. OVE TAMPA, FL CONVERGENT COMMUNICATIONS, INC. OSI ENGLEWOOD, CA CONVERGENT TELESIS LLC OVS SOUTHAMPTON, NY CONVERGIA OGA POINTE-CLAIRE, PQ CONVERSENT COMMUNICATIONS LLC (PREV NEW NVA PROVIDENCE, RI ENGLAND VOICE & DATA) CONXUS SPECTRUM, INC. (PREV. PCS DEVELOPMENT PDC GREENVILLE, SC (PCSD) CORPORATION COOK COMMUNICATIONS CKC FRESNO, CA COOK COMMUNICATIONS CORP CXK LITTLETON, CO COOK TELECOM INC OF SAN DIEGO CKT SAN RAFAEL, CA COOK TELECOM, INC. YIP SAN RAFAEL, CA COON CREEK TELECOMMUNICATIONS CORP OOC BLAIRSTOWN, IA COON RAPIDS MUNICIPAL UTILITY ORM DAKOTA DUNES, SD COON VALLEY LONG DISTANCE, INC. OVL COON VALLEY, WI COOPERATIVE COMM. INC (PREV COOP. LONG DISTANCE CPV BELLEVILLE, NJ SERVICES INC) COOPERATIVE TELEPHONE COMPANY CJT VICTOR, IA COPPER VALLEY LONG DISTANCE, INC. DVD VALDEZ, AK CORAL COMMUNICATIONS CRL CORAL TELECOM ORA TALLAHASSEE, FL CORBAN COMMUNICATIONS, INC. ORB DALLAS, TX CORCOM CZM OKLAHOMA CITY, OK CORDIA COMMUNICATIONS CORP. ORD NORWALK, CT CORDOVA COMMUNICATIONS CDV CORE COMMUNICATIONS, INC ORE WASHINGTON, DC CORECOMM (PREV OCOM CORP) OCO WORTHINGTON, OH CORECOMM (PREV OCOM LONG DISTANCE & CELLULAR LUL WORTHINGTON, OH LONG DISTANCE) CORECOMM (PREV OCOM LONG DISTANCE ) SEE - ALSO CUL WORTHINGTON, OH LUL CORECOMM NEWCO, INC DBA CORECOMM (PREV USN FNO WORTHINGTON, OH COMMUNICATIONS) COREEXPRESS, INC. ORX ST. LOUIS, MO COREON, INC. OEO STATEN ISLAND, NY CORESTATES FINANCIAL CORP CTF PHILADELPHIA, PA CORETEL MASSACHUSETTS, INC. ORU ANNAPOLIS, MD CORNEY’S ELECTRONICS INC. CYE ORISKANY, NY CORNHUSKER PAGING INC CNH COLUMBUS, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 8–57 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CORPORATE COMMUNICATION CONSULTANTS INC CYQ VIRGINIA BEACH, VA CORPORATE COMMUNICATIONS GROUP, INC. CZG CORAL GABLES, FL CORPORATE SERVICES/TELCOM CVO LAWRENCE, MA CORPORATE TELECOM INC CZT RICHARDSON, TX CORPORATEPAGE.COM, INC. OAG ROCHESTER, NY CORPUS CHRISTI COMMUNICATIONS INC CCH CORPUS CHRISTI, TX CORRECTIONAL COMMUNICATIONS CORP INC CQS SAN RAMON, CA CORRNET CORRECTIONAL NETWORK INC CRK PHOENIX, AZ CORSICANA PAGING SERVICE, INC. OPS CORSICANA, TX CORTLAND ANSWERING SERVICE CAN COSERV BROADBAND SERVICES (PREV TELEPHONE THH CORINTH, TX PLUS) COSERV, L.L.C. OSV LEWISVILLE, TX COSHOCTON LONG DISTANCE SERVICE CLD COSHOCTON, OH COST MANAGEMENT CONSULTANTS CGU RICHBORO, PA COUGAR LONG DISTANCE CGK ARLINGTON, TX COUNCIL GROVE TELEPHONE COMPANY OGV COUNCIL GROVE, KS COUNTRY ROAD COMMUNICATIONS INC YRC OAK HILL, VA COUNTY OF MOMTGOMERY, COMMUNICATIONS DIV CYM EAGLEVILLE, PA COURTESY COMMUNICATIONS CUR SPOKANE, WA COVAD COMMUNICATIONS COMPANY OVC PALO ALTO, CA COVISTA OF NEW YORK, INC. ONK LITTLE FALLS, NJ COVISTA OF VIRGINIA, INC. OVI LITTLE FALLS, NJ COVISTA, INC. OVA LITTLE FALLS, NJ COVISTA, INC. (PREV TOTAL-TEL USA INC) TTU LITTLE FALLS, NJ COX CABLE TWIN CITIES CQC MOLINE, IL COXCOM, INC. (PREV. COX COMMUNICATIONS, INC.) CJI ATLANTA, GA COYOTE METRO, LLC (PREV SATTEL STREAMRAMP, LLC) SSL TERRE HAUTE, IN CP-TEL NETWORK SERVICES, INC PSZ NATCHITOCHES, LA CRADDOCK TELESYSTEMS INC CDK SANTA BARBARA, CA CRAW-KAN COMMUNICATION SYSTEMS, INC RWK GIRARD, KS CRC COMMUNICATIONS OF CALIFORNIA, INC. RFA TURLOCK, CA CRC COMMUNICATIONS OF MAINE, INC. RMN GRAY, ME CREATIVE TELECOMMUNICATIONS INC CTV CREDIT LOANS, INC. D/B/A LONE STAR COMMUNICATIONS LSA CONROE, TX CREG SYSTEMS CORP CGS WATERTOWN, NY CRESCENT COMMUNICATIONS CJR HOUSTON, TX CRESCENT COMMUNICATIONS INC RSE LAS VEGAS, NV

Proprietary — Licensed Material See proprietary restrictions on title page. 8–58 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CRESTED BUTTE COMMUNICATIONS INC. (1994) CBX AVON, CO CRESTED BUTTE COMMUNICATIONS(PRE. 1988) CBT CRESTWOOD COMPANIES INC CRW CRICKET COMMUNICATIONS, INC RKM NASHVILLE, TN CRITERION TEL CORP CRI HOUSTON, TX CRITICAL TECHNOLOGIES INC. CFB SAN ANTONIO, TX CRJ COMMUNICATIONS, INC. RJO HORIZON, MI CRL NETWORK SERVICES RLN SAN FRANCISCO, CA CROCKETT TELEPHONE COMPANY, INC. ROK MONROE, LA CROSS COUNTRY CELLULAR INC CRU CINCINNATI, OH CROSS TELEPHONE COMPANY RSL TULSA, OK CROSSCHECK, INC. CKV ROHNERT PARK, CA CROSSLINK LONG DISTANCE, COMPANY RKL CROSSVILLE, IL CROSSPOINT COMMUNICATIONS CORP CPX LONG BEACH, CA CROSS-VALLIANT CELLULAR PARTNERSHIP CVH WARNER, OK CROWLEY CELLULAR DEVELOPMENT CORP CWY WAXO, TX CROWN CELLULAR & PAGING RWC COVINA, CA CROWN TOWER SYSTEMS INC CWX LEES SUMMIT, MO CRX SERVICE COMPANY CXG DALLAS, TX CRYSTAL CLEAR CONNECTIONS, INC. RYS ASHEVILLE, NC CRYSTAL CLEAR PAGING CZY SAN ANTONIO, TX CRYSTAL COMM CYF UBORO, MA CRYSTAL COMMUNICATIONS, INC. DBA HICKORYTECH CFZ MANKATO, MN CS WIRELESS SYSTEMS INC. SRY PLANO, TX CSH CELLULAR, INC. CJC NEWPORT BEACH, CA CSI BILLING SERVICES INC CBS DALLAS, TX CSINET INTERNET ACCESS CORPORATION SEJ LAPORTE, IN CST COMMUNICATIONS, INC. (PREV. CENTRAL SCOTT CJO ELDRIDGE, IA TELEPHONE COMPANY) CSTC, LLC SYW RENSSELAER, NY CSW NET INC. CEF DANVILLE, AR CSW/ICG CHOICECOM, L.P. SHO SAN ANTONIO, TX C-SYSTEMS, INC SYE COEUR D’ALENE, ID CT COMMUNICATIONS NETWORK, INC. OIW URBANA, OH CTA COMMUNICATIONS CIO CANBY, OR CTC COMMUNICATIONS CORP. (PREV COMPUTER CPO WALTHAM, MA TELEPHONE CORP) CTC COMMUNICATIONS INC TQB DALLAS, WI CTC EXCHANGE SERVICES, INC EXE CONCORD, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–59 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location CTC TELCOM, INC. XTM DALLAS, WI CTC TELECOM, INC TVF CAMBRIDGE, ID CTI (COMPANY) CTZ CTN TELEPHONE NETWORK, INC. NNE LA JOLLA, CA CUBE COMPUTER CORPORATION UBE HAWTHORNE, NY CUMBERLAND CELLULAR PARTNERSHIP CDP ATCO, NJ CUMBERLAND MOUNTAIN PAGING SERVICES CGV MIDDLESBORO, KY CUMBERLAND TELEPHONE COMPANY UME CUMBERLAND, IA CUMBY TELEPHONE COOPERATIVE, INC. UBY CUMBY, TX CUMMINGS TELECOMMUNICATION SERVICES, INC. UMC WESTCHESTER, IL CURRY COMMUNICATIONS CYW MONROEVILLE, PA CURTERY ANSWERING SERVICE CTY CURTIN CALL CCL CURTIN CALL CORPORATION CTN CUSTER TELEPHONE COOPERATIVE, INC. UER CHALLIS, ID CUSTOM COMMUNICATIONS CUC HOLLAND, MI CUSTOM RADIO CSM CUSTOM TELECONNECT, INC. CXI LAS VEGAS, NV CUSTOMER FIRST COMMUNICATIONS, INC. UFO ROLLING MEADOWS, IL CUT BANK COMMUNICATIONS CBK CUTTER COMMUNICATIONS, INC DBA GCEC GCH VAN ALSTYNE, TX TECHNOLOGIES CYBERLINK PACIFIC TELECOM LIMITED (PREV HKT VANCOUVER, BC HONGKONG TELECOM (CANADA) CYBERNET COMMUNICATIONS, INC. CYX LOS ANGELES, CA CYBERTECH COMMUNICATIONS CORP CYR NORTHFIELD, IL CYBERTEL COMMUNICATIONS, CORP. YBC LA JOLLA, CA CYBERTEL CORPORATION (PREV CYBERTEL MISSOURI) CMO SCHAUMBURG, IL CYBERTEL INC CBL CYLIX COMM NETWORK (PREV RCA CYLIX COMM RCX MEMPHIS, TN NETWORK) CYPRESS TELECOMMUNICATIONS YPR NORCROSS, GA CYPRESS TELECOMMUNICATIONS CORP (CYTEL) CTQ HOUSTON, TX CYRIS, LLC YRI VIRGINIA BEACH, VA CYTELA COMMUNICATIONS, INC. YTU SAN DIEGO, CA D & E SYSTEMS, INC. DEY EPHRATA, PA D C I MOBILE TELEPHONE AND PAGING DCI D H COMMUNICATIONS DHH SAN ANTONIO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–60 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location D&E/OMNIPOINT WIRELESS JOINT VENTURE L.P. DBA PCS PSO EPHRATA, PA ONE D&K BUSINESS PAGERS DKB WARNERS, NY D&L COMMUNICATIONS INC DLC FORT WAYNE, IN D.D.D. CALLING, INC. DDD HOUSTON, TX D.V.C. ENTERPRISES, INC. DBA DVC TELECOM DVE TEXARKANA, TX D/FW SIGNAL INC DFW D2 WIRELESS, INC DWI FLUSHING, NY DACO TELECOMMUNICATIONS, INC. DCU OTTAWA, CN DACOM CORPORATION DAO SEOUL, KO DAG INC DAG DAKON DKN SIOUX FALLS, SD DAKOTA CARRIER NETWORK DCE FARGO, ND DAKOTA CARRIER SERVICES DCV TUCSON, AZ DAKOTA CELLULAR INC DKT ABERDEEN, SD DAKOTA CENTRAL TELECOMMUNICATIONS DKM CARRINGTON, ND COOPERATIVE DAKOTA ELECTRONICS DKA ABERDEEN, SD DAKOTA RADIO PAGING INC DRP DAKOTA TELECOM, INC. DKI IRENE, SD DAKOTA TELECOMMUNICATIONS GROUP, INC.(PREV DKC IRENE, SD DAKOTA COOPERATIVE) DAKTEL COMMUNICATIONS, LLC DKO CARRINGTON, ND DALLAS NEXTFONE SYSTEMS, L.C. DNX DALLAS, TX DALLAS TELEPHONE AND PAGING, INC. DTP HOUSTON, TX DAMACOM DAA OAKBROOK, IL DAMRON CORPORATION DON CHICAGO, IL DAN COMM DAN CINCINNATI, OH DANBURY CELLULAR DBY ROCHESTER, NY DANCRIS TELECOM, L.L.C. DNR SCOTTSDALE, AZ DANCRIS TELECOM, L.L.C. (PREV YAVAPAI TELEPHONE YTE SCOTTSDALE, AZ EXCHANGE) DANIEL ISLAND MEDIA COMPANY DIY HOUSTON, TX DANTIS INC DAJ CHICAGO, IL DANVILLE METRONET INC DMR GREENSBORO, NC DANVILLE REDI PAGE INC DLR DANVILLE, IL DARIEN COMMUNICATIONS, INC. DCK DARIEN, GA DARK AIR CORPORATION DKR WOBURN, MA DATA & ELECTRONIC SERVICES INC DES DESTIN, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–61 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DATA & TELEPHONY ALTERNATIVE INC DTY DALLAS, TX DATA CELLULAR SYSTEMS DSY WOODLAND HILLS, CA DATA COM INC (PREV OFFSHORE TEL CO) OST MOGAN CITY, LA DATA COMMUNICATION SERVICE DTT AZLE, TX DATA COPI DCP DATA GENERAL NETWORK SERVICES (PREV DAMA DMA ROCKVILLE, MD TELECOM CORP) DATA NET SYSTEMS, L.L.C. DAS BUFFALO GROVE, IL DATA PROCESSING SCIENCES CORPORATION DPP CINCINNATI, OH DATA UTILITIES INC DUI DATABASE TECHNOLOGIES, INC. DBT POMPANO BEACH, FL DATACHOICE NETWORK SERVICES, L.L.C. DCW LITTLETON, CO DATACOM CORP DMP BROOKLYN, NY DATACOMM INTERNATIONAL CO. LTD. DMM MIAMI, FL DATANET COMMUNICATIONS INC NTT MILWAUKEE, WI DATAPAGE, INC. DGE MIDDLEBURY, VT DATATECH DTH HANNIBAL, MS DATA-TELECOM CORP DPO WAPAKONETA, OH DATATRONCX INC DTX ROCHESTER, NY DATAVISION COMMUNICATIONS, INC. DSS GERVAIS, OR DATAVON INC DTF RICHARDSON, TX DATEL COMMUNICATIONS SYSTEMS INC DCS DAVELTEL INC (PREV PHONE ZONE FRANCHISES LTD) PZF TAMPA, FL DAVID D. ANDERSON COMMUNICATIONS CORP. DDA PALM DESERT, CA DAVIESS-MARTIN RTC TELECOMMUNICATIONS COMPANY DVM MONTGOMERY, IN DAVIS CABLE INSTALLATIONS, INC. DCB PHILADELPHIA, PA DAVIS LONG DISTANCE DVS DALLAS, TX DAYTON CELLULAR TELEPHONE DYT DAYTON, OH DAYTONA TELEPHONE COMPANY DAY BARTLETT, TN DBS COMMUNICATIONS, INC. DSO SCHAUMBURG, IL DCI INC DCZ PHILADELPHIA, PA DCS, INC. DCQ SAN LEANDRO, CA DDR BROADBAND NETWORKS, LLC. DBN ATLANTA, GA DE RIDDER MOBILEFONE DRM DEADWOOD CELLULAR TELEPHONE COMPANY, INC. DDW WEST ATLANTC CITY, NJ DECIMAL DATALINK INC DEC UNION, OH DECKER COMMUNICATIONS SYSTEMS OF NEW MEXICO, DKY TAOS, NM INC.

Proprietary — Licensed Material See proprietary restrictions on title page. 8–62 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DEDICATED COMMUNICATIONS CORP (PREV 4JV VCS TEMPE, AZ ENTERPRISES, INC) DEFAULT VALUE FOR CASUAL CUSTOMER. NOT A VALID CUS IAC CODE. DEFAULT VALUE FOR CASUAL CUSTOMER. NOT A VALID ZZZ IAC CODE. DEFENSE COMMERCIAL COMMUNICATIONS OFFICE DCO SCOTT AIRFORCE BASE, IL DEFENSE COMMUNICATIONS AGENCY DSN WASHINGTON, DC DEKALB TELEPHONE COOPERATIVE, INC. DKL ALEXANDRIA, TN DEL MAR COMMUNICATIONS INC DEM SARATOGA, CA DELAWARE MOBILE TELE CO DLW DELAWARE TELEPHONE ANSWERING SERVICE INC DTA DELCAMBRE TELEPHONE COMPANY INC DBE DELCAMBRE, LA DELHI NET, INC. DLH DELHI, NY DELOACH’S HOME ENTERTAINMENT CENTERS, INC. DHE GRAND PRAIRIE, TX DELRAY CELLULAR ASSOCIATES 11 DRC BETHESDA, MD DELSTAN INDUSTRIES INC DEL DELTA COMMUNICATION DOC NEWARK, NJ DELTA COMMUNICATIONS, L.L.C. DLV HARRISBURG, IL DELTA MOBILE DMB DELTA MOBILE TELEPHONE OF ARKANSAS INC DMT DELTA PHONES, INC. DAH DELHI, LA DELTA VALLEY RADIO TELEPHONE DVL DELTACOM LONG DISTANCE (PREV. DELTA DLT ARAB, AL COMMUNICATIONS INC) DELTACOM LONG DISTANCE SERVICES(PREV.SOUTHERN SIR ARAB, AL INTEREXCHANGE SVC) DELTACOM, INC. DET WEST POINT, GA DELTATEL, INC. DTQ ATLANTA, GA DELTATHREE.COM DLQ NEW YORK, NY DELTEL COMMUNICATIONS, INC. DEU DELCAMBRE, LA DELUXE DATA SYSTEMS INC DLX NEW BERLIN, WI DEL-VAL AREA CALL DVA DENT REDFORD DBA PAGE-COMM KRP KANASA, KS DENVER & EPHRATA TELEPHONE AND TELEGRAPH CO DEP EPHRATA, PA DENVER DIRECT DIAL, LLC DID BROOMFIELD, CO DENWA COMMUNICATIONS, INC. DEN FAIRFAX, VA DEPARTMENT OF CORRECTIONS DORCHESTER COUNTY DCD CAMBRIDGE, MD DEPARTMENT OF MARYLAND STATE POLICE DMY JESSUP, MD QUARTERMASTER DIVISION

Proprietary — Licensed Material See proprietary restrictions on title page. 8–63 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DEPARTMENT OF THE NAVY CONSOLIDATED SUPPORT DNU DAHLGREN, VA DETACHMENT DEPARTMENT OF THE TREASURY INTERNAL REVENUE DTV WASHINGTON, DC SERVICE DEPT OF GENERAL SERVICES ST OF MARYLAND DGS BALTIMORE, MD DEPT OF HEALTH & MENTAL HYGIENE ST OF MARYLAND DHM BALTIMORE, MD DES MOINES CELLULAR PARTNERSHIP DMC DES MONIES, IA DESERT MOBILFONE DMF RIDGECREST, CA DESKTOP MEDIA, INC. DEO ALBERT LEA, MN DEVON MOBILE COMMUNICATIONS, L.P. DMU BUFFALO, NY DFW COMMUNICATION DFC DFW/METROLINK INC DFM DALLAS, TX DHC, INC. DHI EVANSTON, IL DHL COMMUNICATIONS CORP DHL DHT FUND INC DHT PHOENIX, AZ DIAL A PAGE DLG RUSSELLVILLE, AR DIAL AMERICA INC DAM CAMDEN, NJ DIAL AMERICA MARKETING INC DMK KANSAS CITY, MO DIAL CALL COMMUNICATIONS, INC. DCX NORCROSS, GA DIAL DISTANCE, INC. DDN ATLANTA, GA DIAL LONG DISTANCE, INC. DLE CAMARILLO, CA DIAL N SAVE CORP DNS SACRAMENTO, CA DIAL NETWORK DNK DIAL PAGE DAL SANTA BARBARA, CA DIAL PAGE DIA CHARLOTTE, NC DIAL PAGE DIL MYRTLE BEACH, SC DIAL PAGE DPE FLORENCE, SC DIAL PAGE DZP TAMPA, FL DIAL PAGE OF THE TRIANGLE DPA RALEIGH, NC DIAL SERVICES LTD DSL BOCA RATAN, FL DIAL -THRU INTERNATIONAL CORPORATION DLU LOS ANGELES, CA DIAL TONE, INC DII MONTGOMERY, AL DIAL TONE, INC. DIE MONTGOMERY, AL DIAL TWO INC DTW SANTA ROSA, CA DIAL-1 DLO BEND, OR DIAL-A-BEEPER INC DAB BROOKLYN, NY DIALALOT.COM, INC. DAI WHITEHOUSE STATION, NJ DIAL-A-PAGE DLP WATSEKA, IL DIAL-A-PAGE INC DAP

Proprietary — Licensed Material See proprietary restrictions on title page. 8–64 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DIALINK DAK MOUNTAIN VIEW, CA DIALMEX DAX MCALLEN, TX DIALOG SMALL BUSINESS ALLIANCE, INC. DSB CHARLOTTE, NC DIALOGIC COMMUNICATIONS CORP DCC FRANKLIN, TN DIALPAD.COM, INC DPD SANTA CLARA, CA DIALTEK, LLC DIK SEATTLE, WA DIAMOND COMMUNICATIONS DMD PLANO, TX DIAMOND COMMUNICATIONS INTERNATIONAL, INC. DOI DALLAS, TX DIAMOND LONG DISTANCE OPERATOR DDO AUSTIN, TX DIAMOND TELCO - YOUR HOME TELEPHONE STORE DOE CORPUS CHRISTI, TX DICELLOM COMMUNICATIONS DEJ IRVINE, CA DICKEY RURAL COMMUNICATIONS, INC. DRO ELLENDALE, ND DICKEY RURAL TEL COOP. DRU ELLENDALE, ND DICOMM CELLULAR INC DIC LYNN, MA DIDIER COMMUNICATION PAGING, INC. DDP FORT SMITH, AR DIDIER COMMUNICATION SERVICES, INC. DMS FORT SMITH, AR DIGATEL COMMUNICATION SYSTEMS, LLC DGY MAPLEWOOD, NJ DIGI COMM DIG PALESTINE, TX DIGI-CELL INC DGC BROOKSVILLE, FL DIGICOM COMMUNICATIONS DGM BINGHAMTON, NY DIGICOM INTERNATIONAL DGR SALT LAKE CITY, UT DIGICOM, INC. DIM RICHMOND HTS, OH DIGILINK DGK LAWNDALE, CA DIGINET COMMUNICATIONS INC DGI ROCKVILLE, MD DIGI-NET INC DNT MILWAUKEE, WI DIGI-PAGE DGG OXFORD, KS DIGIPH PCS, INC. DPH MOBILE, AL DIGITAL AGENT, INC. DEG ATLANTA, GA DIGITAL BROADBAND COMMUNICATIONS, INC. DGB WINCHESTER, MA DIGITAL CELLULAR OF TEXAS PLB LUBBOCK, TX DIGITAL COMMUNICATION SERVICE, INC. DGU RARITAN, NJ DIGITAL COMMUNICATIONS DLZ DALLAS, TX DIGITAL CONNECTIONS, INC. DGW MORGANTOWN, WV DIGITAL DATA SOLUTIONS, INC. DDU DAYTON, OH DIGITAL DIAL COMMUNICATIONS INC DDC ARLINGTON, TX DIGITAL DIAL COMMUNICATIONS, INC. DGO ARLINGTON, TX DIGITAL EXPRESS COMMUNICATIONS CORP DXO MONUMENT, CO DIGITAL ISLAND, INC. DIH HONOLULU, HI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–65 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DIGITAL NETWORK INTEGRATORS INC DWK FENTON, MO DIGITAL NETWORK SERVICES INC DLN ALBUQUERQUE, NM DIGITAL NETWORK SERVICES INC DSV LAS VEGAS, NV DIGITAL PAGING SYSTEM DPS DIGITAL PAGING SYSTEM OF ATLANTIC CITY DAC DIGITAL PAGING SYSTEM OF NEW YORK INC DNY DIGITAL PAGING SYSTEMS OF CLEVELAND INC DPC DIGITAL PAGING SYSTEMS OF INDIANA INC DPG DIGITAL PAGING SYSTEMS OF KY DPK DIGITAL PAGING SYSTEMS OF PITTSBURGH INC DGP DIGITAL PAGING SYSTEMS OF TOLEDO INC DPT DIGITAL PAGING SYSTEMS OF WISCONSIN DPW DIGITAL PIPELINE COMMUNICATIONS INC DPM ALGONQUIN, IL DIGITAL SIGNAL COMMUNICATIONS, INC. DBA DSCI DSG LEXINGTON, MA CORPORATION DIGITAL TELECOM DGT DENVER, CO DIGITAL TELECOMMUNICATIONS GROUP INC DTG WEST MONROE, LA DIGITAL TELECOMMUNICATIONS INC DLI EXTON, PA DIGITAL TELECOMMUNICATIONS, INC DIO WINONA, MN DIGITAL TELEPORT INC DTI ST LOUIS, MO DIGITAL TELEVISION SERVICES, INC. DAV MONTGOMERY, IN DIGITAL WORLD COMMUNICATIONS INCORPORATED DWC ALBANY, NY DIGITCOM SERVICES DGV LOS ANGELES, CA DIG-I-TEL DIT SEATTLE, WA DILAN FINANCIAL GROUP, INC. DFG NORTH RIDGE, CA DIME COMMUNICATIONS, INC DOM NEW YORK, NY DIMENSION ELECTRONICS INC DEI DIRECT COMM, INC. DCH FARMINGTON, NM DIRECT COMMUNICATION INC DCT BATON ROUGE, LA DIRECT COMMUNICATIONS DRX JOPLIN, MO DIRECT COMMUNICATIONS, INC. (TX) DRE KATY, TX DIRECT COMMUNICATIONS, LLC DIU BIG LAKE, MN DIRECT DATA INC. DRA NEWPORT NEWS, VA DIRECT DIAL INC DDI DIRECT DIALING SYSTEMS INC DDS TYLER, TX DIRECT GUIDANCE, INC. DGA FT. LAUDERDALE, FL DIRECT LD, INC. DRD GRAND PRAIRIE, TX DIRECT LINE ANSWERING INC DCL COLUMBUS, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 8–66 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DIRECT LINE AUSTIN INC DTL AUSTIN, TX DIRECT LINE DIV OF TRANSCALL DDT AUSTIN, TX DIRECT LINE HASP INC DRL DIRECT LINE OF KANSAS DOK KANSAS CITY, KS DIRECT LINE OF OKLAHOMA DIR OKLACTY, OK DIRECT LINE OF SPRINGFIELD DOS SPRINGFIELD, MO DIRECT LINE TELCO DRT OK CITY, OK DIRECT NET TELECOMMUNICATIONS DNQ NEWPORT BEACH, CA DIRECT NETWORK CO DNW HOUSTON, TX DIRECT NETWORK SERVICES, INC. DNV HOUSTON, TX DIRECT PAGE COMMUNICATIONS DCM SANTA ANA, CA DIRECT/NET INC OF USA DTN NEW ORLEANS, LA DIRECT/NET LTD OF DALLAS DDL HOUSTON, TX DIRECT/NET OF BATON ROUGE DBR BATON ROUGE, LA DIRECT/NET OF LAFAYETTE DNL LAFAYETTE, LA DIRECT/NET OF NEW ORLEANS DRN NEW ORLEANS, LA DIRECT/NET OF SHREVEPORT DSP BOSSIER CITY, LA DIRECT2INTERNET CORP. DRR BOCA RATON, FL DIRECTLINE TELAMERICA DTM SPRINGFIELD, MO DIRECT-LINK DLK NEW BRAUNFELS, TX DIRECTLINK OF OREGON, INC. DOR CANBY, OR DIRECTORY AMERICA, INCORPORATED DYA LYNDHURST, OH DIRECTORYNET INC DCY ATLANTA, GA DIRECT-TEL, INC. DRI BOCA RATON, FL DISCOUNT ALTERNATIVE TELEPHONE SVC DAT DISCOUNT AMERICA LONG DISTANCE, INC. DAD SAN MARCOS, TX DISCOUNT COMMUNICATIONS DSU MEMPHIS, TN DISCOUNT DIAL DSD EDLNA, MN DISCOUNT LONG DISTANCE DND KNOXVILLE, TN DISCOUNT LONG DISTANCE INC DLD DISCOUNT LONG DISTANCE OF AMERICA DAR ST LOUIS, MO DISCOUNT LONG DISTANCE, INC. DNE SANTA ANA, CA DISCOUNT NETWORK SERVICES INC. DWS DEARBORN HTS, MI DISCOUNT PAYPHONE CARRIERS INC DPY FT LAUDERDALE, FL DISCOUNT PLUS DPU COLUMBUS, OH DISCOUNT TRANSMISSION SYSTEMS INC DTS DISTRIBUTION PLUS DPL FREDERICK, MD DITTRONICS DTO BENTON, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 8–67 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DIVERSE COMMUNICATIONS INC DVU WOODHULL, IL DIVERSIFIED COMMUNICATION SERVICES, LLP DBA DFV MAXWELL, IN FIRST CHOICE COMMUNIC DIVERSIFIED COMMUNICATION SOLUTIONS DVO CANTON, OH DIXIE COMMUNICATIONS DXC ST. GEORGE, UT DIXIENET COMMUNICATIONS, LLC DXN RIPLEY, MS DJS COMMUNICATIONS, INC. DJS PITTSBURGH, PA DMG, INC DBA VOICE-TEL OF NORTH TEXAS DMG GRAND PRAIRIE, TX DMI COMMUNICATIONS GROUP, INC. DMI FORT LEE, NJ DMJ COMMUNICATIONS, INC. DMJ ODESSA, TX DNS INC DNN DUNCANVILLE, TX DOBSON CELLULAR OF CALIFORNIA, INC. DBC OKLAHOMA CITY, OK DOBSON CELLULAR OF IMPERIAL, INC. DBI OKLAHOMA CITY, OK DOBSON CELLULAR SYSTEMS DNC OKLAHOMA CITY, OK DOBSON FIBER COMPANY, INC. DBF OKLAHOMA CITY, OK DOLPHIN TELECOMMUNICATION CORP DPN HOUSTON, TX DOME COMMUNICATIONS DME DOMINICAN COMMUNICATION CORP DMN NEW YORK, NY DOMINION BANKSHARES CORP DBS ROANOKE, VA DOMINION GROUP LTD DOG ISLANDIA, NY DOMINION TELECOM DOV RICHMOND, VA DOMINOS PIZZA INC DPI ANN ARBOR, MI DON CLARK RADIO COMMUNICATIONS INC DCR BLACKFOOT, ID DONLEY COMMUNICATIONS DLY LEBANON, PA DONTEL INTERNATIONAL L.L.C. DOL WHEELING, IL DOTHAM CELLULAR TELEPHONE CO DOT DOTHAM, AL DOUGLAS PAGING CO DLS DOUGLAS, GA DOUGLAS SERVICES, INC. DUV ROSEBURG, OR DOUGLAS TELECOMMUNICATIONS, INC. DUG SAN RAFAEL, CA DOUTELCO LLC DOU RIVERTON, UT DOVER RADIO PAGE INC DVR DOYLE ROGERS CO DRS LITTLE ROCK, AR DOYLESTOWN COMMUNICATIONS, INC. DOY DOYLESTOWN, OH DPI TELECONNECT, L.L.C. DIN DALLAS, TX DRAKE PAGING DKP BEATTYVILLE, KY DRENTHE TELEPHONE COMPANY DEE ZEELAND, MI DSH & ASSOCIATES DSA ADDISON, TX DSL INTERNET CORPORATION DLJ MIAMI, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–68 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location DSL TELECOM, INC. DSM MIAMI, FL DSLNET COMMUNICATIONS, LLC DSE NORWALK, CT D-TEL INC DED ISLANDIA, NY D-TEL LLC DTB WILMINGTON, DE DTG COMMUNICATIONS, INC (PREV TUC IRENE, SD TELECOMMUNICATIONS CONSULTANTS INC) DTI COM, INC. DTK LOS ANGELES, CA DTI CORPORATION DTZ WINONA, MN DUBOIS MOBILE TELEPHONE CO INC DUB JOHNSTOWN, PA DUCOR TELEPHONE CO DUC DUCOR, CA DUKENET COMMUNICATIONS, INC. DUK CHARLOTTE, NC DULUTH PCS, INC. DUL WINTER PARK, FL DUMONT TELEPHONE COMPANY DUO DUMONT, IA DUN & BRADSTREET INFORMATION SERVICES DUN PARSIPPANY, NJ DUNN & ASSOCIATES DBA BOULEVARD TELEPHONE DNA OVERLAND PARK, KS DUNN LONG DISTNCE DNG DALLAS, TX DUNNE COMMUNICATIONS DUE ANACONDA, MT DUNSNET DST WILTON, CT DUO COUNTY TELEPHONE COOPERATIVE CORPORTION, DUP JAMESTOWN, KY INC. DUPONT INFORMATION SYSTEMS DIS WILMINGTON, DL DUQUESNE UNIVERSITY DUU PITTSBURGH, PA DURO COMMUNICATIONS INC DUR KENNESAW, GA DUTCHESS COUNTY CELLULAR DUT WAPPINGER FALLS, NY DV2 INC DVI MARIETTA, GA DVORAK DVK KENNEDALE, TX DYNA CORP DYN DYNALINK TELECOMS, INC. DYI OAKLAND, CA DYNAMIC TELCO SERVICES, INC. DYS WASHINGTON, DC DYNAMIC TELECOM INTERNATIONAL INC. DYM FORT LAUDERDALE, FL DYNATEL INC. DYL JACKSONVILLE, FL DYNATEL LONG DISTANCE SERVICES, INC. DYD LAS VEGAS, NV DYNEGY CLEC COMMUNICATIONS, INC. DYC AURORA, CO DYNEGY CONNECT, L.P. DYG AURORA, CO E & J MOBILE RADIO SERVICE EJM E AND K SYSTEMS EKS SECAUCUS, NJ E F HUTTON EFH NEW YORK, NY E G COMMUNICATIONS EGC E.COM TECHNOLOGIES, LLC. ETY CARMEL, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–69 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location E.SPIRE COMMUNICATIONS, INC (PREV AMERICAN AVS ANNAPOLIS JUNCTION, MD COMMUN. SERVICES INC) E.T. KING TELECOMMUNICATIONS, INC. ETK GREENSBORO, NC EAGLE COMMUNICATIONS EGL EAGLE COMMUNICATIONS INC (PRE. 1988) ELB EAGLE COMMUNICATIONS INC.(1994) EGM AVON, CO EAGLE COMMUNICATIONS OF CA LLC EGA NEW YORK, NY EAGLE COMMUNICATIONS, INC. EAE NYC, NY EAGLE TELEPHONE SYSTEM INC ETZ RICHLAND, OR EAGLE WATCH AND PATROL SERVICE INC EWP ELMHURST, IL EAGLECOM (DBA PTSI LONG DISTANCE) EGP GUYMON, OK EAGLENET INC EAG HOLLAND, MI EALS DISTRIBUTING CO ERL IDAHO FALLS, ID EARTHCALL COMMUNICATIONS CORPORATION EHL ATLANTA, GA EAS COMMUNICATION INC EAM WEST COVINA, CA EASLEY COMMUNICATIONS OF ARKANSAS, INC. ESC FORT SMITH, AR EAST ARKANSAS CELLULAR TELEPHONE CORP EAR WAUKESHA, WI EAST ASCENSION TELE CO INC EEN GONZALES, LA EAST COAST COMMUNICATIONS, INC. EOM RICHMOND, VA EASTERBOOKE CELLULAR CORP EST FAIRFIELD, CA EASTERN CABLE TELEVISION SERVICES INC ETV LONG ISLAND CITY, NY EASTERN COLORADO INDEPENDENT NETWORKS, LLC. ECK BYERS, CO EASTERN COMPUTER SERVICES INC EPV BELLEVILLE, NJ EASTERN ILLINI SERVICES CORPORATION EIV PAXTON, IL EASTERN OREGON TELECOM LLC EOG HERMISTON, OR EASTERN RADIO SERVICE ERS MATTHEWS, NC EASTERN TELECOM DBA INTERQUEST ETG WEST POINT, GA EASTERN TELECOMMUNICATIONS, INC. ERN NEW YORK, NY EASTERN TELEPHONE SYSTEMS ETS EASTERN TRANS COMMUNICATIONS ETR DETROIT, MI EASTEX CELLULAR ETX HUNTSVILLE, TX EASTGATE COMMUNICATIONS INC. EGT TEANECK, NJ EASTLAND OF ORLANDO TELEPHONE CORPORATION ESO ORLANDO, FL EASTMAN KODAK COMPANY EKN ROCHESTER, NY EASTON TELECOM SERVICES, INC. ESI RICHFIELD, OH EASY CALL, INC. EAY CHICAGO, IL EASY CELLULAR, INC. ECZ LAS VEGAS, NV EASY COMM BEEPERS ECX LAS VEGAS, NV

Proprietary — Licensed Material See proprietary restrictions on title page. 8–70 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location EASY ORDER SOFTWARE INC EOS SYRACUSE, NY EASYLINK SERVICES USA, INC. (PREV DIGITRAN CORP) DTR EDISON, NJ EATELNET INC ETN GONZALES, LA EAU CLAIRE CELLULAR TELEPHONE LIMITED ECT ALTOONA, WI PARTNERSHIP EBILLIT, INC. EBI SAN JOSE, CA EBONTEL COMMUNICATIONS CORPORATION EOL MILWAUKEE, WI ECHO COMMUNICATIONS, INC EHO PITTSTON, PA ECI COMMUNICATIONS, INC. (PREV. ECONO-CALL INC.) ECI EUGENE, OR ECI LONG DISTANCE SERVICES (PREV THINGS INC) THG TULSA, OK ECOCOM TELECOMMUNICATIONS ECQ VIENNA, VA ECON-A-CALL CO (AUSTIN) EAC AUSTIN, TX ECON-A-CALL INC OF HAYS ECA HAYS, KS ECONO CALL INC OF MONTANA EMT KALISPELL, MT ECONO CALL LONG DISTANCE SERVICES ECR LAS CRUCES, NM ECONO DIAL OF LEESBURG ECN LEESBURG, FL ECONO-CALL INC (BILOXI) ECB ECON-O-CALL OF TEHACHATE ENO TEHACHATE, CA ECON-O-CALL, INC DBA UNCLE SAM’S TELCOM, INC. EUS NEW YORK, NY ECONOCOM LONG DISTANCE ELO LUBBOCK, TX ECONODIAL ECD LEESBURG, FL ECON-O-DIAL EDL RIDGECREST, CA ECON-O-DIAL OF BISHOP EOD BISHOP, CA ECONOLINE ABE BIRMINGHAM, AL ECONOLINE ENE ECONO-LINE ECL TRAVERSE CTY, MI ECONO-LINE MIDLAND ELM AUSTIN, TX ECONOLINE WHOLESALE LONG DISTANCE EWL NEW YORK, NY COMMUNICATIONS ECONOMIC LONG DISTANCE COMMUNICATIONS INC ELD ECONOMY TELEPHONE CO ECY SAN DIEGO, CA ECUFIN, INC EUF VIRGINIA BEACH, VA EDCO USA LLC EUL NORWALK, CT EDGAR ELECTRIC CO-OPERATIVE ASSOCIATION EDG PARIS, IL EDGE CONNECTIONS, INC. EDT ATLANTA, GA EDGE WIRELESS, LLC. (PREV NEWCOM WIRELESS, LLC) NWW BEND, OR EDGE2NET EDN KIKRLAND, WA EDISON SELECT ESL CITY OF INDUSTRY, CA EDMOND TELEPHONE COMPANY ETT EDMOND, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 8–71 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location EDS (ELECTRONIC DATA SYSTEMS CORP) EDS WARREN, MI EFFICY GROUP, INC EFG GREENVILLE, SC EFS, INC. DBA FIRST CHOICE COMMUNICATIONS EFF HOPE HULL, AL EGIX NETWORK SERVICES, INC EGX INDIANAPOLIS, IN EGYPTIAN COMMUNICATION SERVICES, INC. EGY STEELEVILLE, IL EIDE ELECTRONICS EDE EL DORADO CELLULAR DBA MOUNTAIN CELLULAR EDO OAKHURST, CA EL DORADO COMMUNICATIONS CO EDR PINE GROVE, CA EL FENIX TELEPHONE CORP EFX CLIFFSIDE PARK, NJ EL PASO NETWORKS, LLC (PREV WALLER CREEK WLR AUSTIN, TX COMMUNICATIONS INC) EL PASO NETWORKS, LLC. ELK HOUSTON, TX EL PASO PAGING, INC. EPI EL PASO, TX ELCOTEL ELL SARASOTA, FL ELECTRA COMMUNICATIONS CORP ELT AUSTIN, TX ELECTRIC LIGHTWAVE INC ELG VANCOUVER, WA ELECTRIC POWER BOARD OF CHATTANOOGA EPB CHATTANOOGA, TN ELECTRO-CRAFT ELC ELECTRONIC ENGINEERING EEG ELECTRONIC SERVICE ASSOC ESA ELECTRONIC SPECIALTIES ETC ELECTRONIC SYSTEMS CO., INC. EYC ALLENTOWN, PA ELECTROPAGE INC ELP ELEPHANT TALK, INC. EPT BOSTON, MA ELINK COMMUNICATIONS, INC. EIO BETHESDA, MD ELITE COMMUNICATIONS INC. EIE TORONTO, CN ELITE TELEPHONE COMPANY, INC. EEH COLORADO SPRINGS, CO ELITEL, INC. EIT LAREDO, TX ELIZABETH TELEPHONE COMPANY, INC. EZB SULPHUR, LA ELLERBE TELEPHONE COMPANY ELA ELLERBE, NC ELLINGTON TELEPHONE COMPANY ENG ELLINGTON, MO ELLIS CELULAR & PAGERS EUP KILLEEN, TX ELLIS THOMPSON INC ETP ATLANTIC CITY, NJ ELLTEL WIRELESS, INC. EWI ELLENSBURG, WA ELW PAGING, LLC EPL OZARK, MO EMCOMM CORP EMM PORTLAND, OR EMERALD COMMUNICATION COMPANY ECM EMERGENT COMMUNICATIONS, LLC. EMU MINNEAPOLIS, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–72 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location EMERITUS COMMUN INC (PREV TELCO COMM GROUP INC TDG CARROLLTON, TX DBA DIAL & SAVE) EMERSON TELECOM EML DALLAS, TX EMERSON TRIPOLI DBA ALTA NETWORKS EAP LINDSAY, CA EMPIRE COMMUNICATIONS INC EIC CHARLOTTE, NC EMPIRE COMMUNICATIONS SERVICES CORPORATION EMP PRATTSBURGH, NY EMPIRE MOBILECOMM SYSTEMS INC EMS EMPIRE ONE TELECOMMUNICATIONS, INC. EOT NEW YORK, NY EMPIRE PAGING CORP EPG EMPIRE TECHNOLOGY CORPORATION ETE ATLANTA, GA EMPIRE-RADIOFONE EPR EMX TELCOM EMX ROCKVILLE, MD ENCORE COMMUNICATIONS, LLC EOR EAGAN, MN ENERGY EAST TELECOMMUNICATIONS, INC. EEM BINGHAMTON, NY ENGINEERING SYSTEMS INC ENS ENGLISH DAVID DBA MOBILE COMMUNICATIONS MOH TYLER, TX SERVICES ENHANCED COMMUNICATIONS NETWORK, LLC EHW INDIANAPOLIS, IN ENHANCED GLOBAL CONVERGENCE SERVICES INC(PREV ITV NASHUA, NH INNOVATIVE TELECOM) ENHANCED SERVICES BILLING INC ESB SAN ANTONIO, TX ENHANCED SERVICES BILLING INC(PREV. CENTRAL CXS CORPUS CHRISTI, TX TEXAS LONG DISTANCE) ENHANCED SERVICES PROVIDER INC. ESP CHATHAM, ON ENHANCED TELECOMMUNICATIONS SOLUTIONS INC ETU EATONTOWN, NJ ENHANCED TELEMANAGEMENT INC EHC MINNEAPOLIS, MN ENID CELLULAR END ENID, OK ENID DATA SYSTEMS INC ENI ENKIDO, INC. EKO HACKENSACK, NJ ENMR TELEPHONE COOPERATIVE EMR CLOVIS, NM ENRON BROADBAND SERVICES, INC (PREV ENRON ENR PORTLAND, OR COMM., INC) EN-TEL COMMUNICATIONS, LLC. ENA ANNANDALE, MN ENTELCO ENTERPRISES INC. (PREV. LADA LAD DIAMOND BAR, CA COMMUNICATIONS) ENTERGY HYPERION TELECOMMUNICATIONS OF EYM PITTSBURGH, PA MISSISSIPPI, L.L.C. ENTERPRISE COMMUNICATIONS PARTNERSHIP EPP COLUMBUS, GA ENTERTAINMENT CONNECTIONS, INC. EME EAST LANSING, MI EN-TOUCH SYSTEMS, INC ENU HOUSTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–73 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ENTRE TELECOMMUNICATIONS CORP ERT CEDER RAPIDS, IA ENVISAGE DBA US OPERATORS ENV SAN ANTONIO, TX ENVOY CORP EVY NASHVILLE, TN EPHONE TELECOM INC EPE HERNDON, VA EPIK COMMUNICATIONS INC EPK ORLANDO, FL EPIX INTERNET SERVICES, INC. EPX DALLAS, PA EQUAL ACCESS NETWORKS, LLC EAK WOBURN, MA EQUAL ACCESS OF WASHINGTON, INC. EAW WASHINGTON, DC EQUAL NET CORP (PREV U S COMM & FIRST CHOICE LONG DSH RICHARDSON, TX DISTANCE) EQUALINE SERVICES, INC. EQL HOUSTON, TX EQUALITY PLUS TELECOMMUNICATIONS EQP WALLINGFORD, CT EQUALNET CORP (PREV U S COMMUN & FIRST CHOICE FSL RICHARDSON, TX LONG DISTANCE, INC EQUALNET CORPORATION (PREV BOTTOM LINE BOT VANCOUVER, WA TELECOMMUNICATIONS, INC) EQUALNET CORPORATION (PREV ECONOLINE OF WACO) ECW WACO, TX EQUALNET CORPORATION (PREV LONG DISTANCE LOS RICHARDSON, TX NETWORK INC0 EQUALNET CORPORATION (PREV OPERATOR SERVICES CIN LUBBOCK, TX CO & CONTEL) EQUALNET CORPORATION (PREV PHOENIX NETWORK & SNN PHOENIX, AZ SUNTEL) EQUALNET CORPORATION (PREV SOUTHWEST LONG JNT FORT SMITH, AR DISTANCE NETWORK-J NET EQUALNET CORPORATION (PREV T.B. ENTERPRISES) TBE ARLINGTON, TX EQUALNET CORPORATION (PREV TELECORP TQI DALLAS, TX INTERNATIONAL) EQUALNET CORPORATION (PREV U S NETWORK) LNO RICHARDSON, TX EQUANT U.S., INC EQU ATLANTA, GA EQUATORIAL COMMUNICATIONS SERVICES ECS EQUIBANK INC EQB PITTSBURGH, PA EQUICOM COMMUNICATIONS INC EQM DUBLIN, OH EQUITABLE GAS CO EQG PITTSBURGH, PA EQUITY VENTURES INC EQY COLORADO SPRINGS, CO ERICKSON DIVERSIFIED CORPORATION EKD HUDSON, WI ERICSSON INC ERK LYNCHBURG, VA ERIE CELLULAR TELEPHONE COMPANY ERC CANFIELD, OH ERIETEL, INC. ERI PA, PA ERLANG, INC. ERG WASHINGTON, DC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–74 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ERNEST COMMUNICATIONS, INC ENC NORCROSS, GA ERNEST TELECOM INC ENT NORCROSS, GA ESCHELON TELECOM, INC (PREV ADVANCED AYD MINNEAPOLIS, MN TELECOMM., INC.) ESCONDIDO TELEPHONE CO ESD ESCONDIDO, CA E-SCRIPT ESR ALAMO, CA ESEMDE INC ESZ BOCA RATON, FL ESP WIRELESS EPW ANAHEIM, CA ESSENTIAL.COM, INC ENL BURLINGTON, MA ESSEX COMMUNICATIONS ESU STERLING, IL ESSEX COMMUNICATIONS PARTNERS ESX RICHMOND, VA ESSEX COMMUNICATIONS, INC. EXU MERRICK, NY ETC COMMUNICATIONS, L.L.C. ETO ELLIJAY, GA ETC/CRLP JOINT VENTURE ECJ HOUSTON, TX ETCOM, LLC EOA ELLERBE, NC E-TEL , LLC. (PREV E-TEL/MURRAY, LLC) ETQ PADUCAH, KY ETEX COMMUNICATIONS, INC. DBA ETEX TELECOM ETA GILMER, TX ETEX LONG DISTANCE DBA ETEX CELLULAR CO., INC ECE GILMER, TX ETS TELEPHONE COMPANY, INC. EEE HOUSTON, TX EUCLID TELECOMMUNICATIONS INC EUT EURONET COMMUNICATIONS, CORP EMC MORGANVILLE, NJ EVANS COMMUNICATIONS EVN EVANS PRODUCTS CO EPC EVANS TELEPHONE CO EVS TURLOCK, CA EVERCOM SYSTEMS INC EVR IRVING, TX EVEREST BROADBAND NETWORKS, INC. EBN FORT LEE, NJ EVEREST CONNECTIONS CORPORATION EVT O’FALLON, MO EVERYTHING TELEPHONE, INC. EVH FT. LAUDERDALE, FL EVOICE TELECOM, INC (PREV EVTI INC.) EVM MENLO PARK, CA EVOLUTION NETWORKS, INC. EVO ATLANTA, GA EVULKAN, INC. EVU NEW YORK, NY EXARIO TELECOM INC ERM PARSIPPANY, NJ EXATEL INC. EXJ SUDBURY, CN EXCEL SWITCH FACILITY, INC. ESW DALLAS, TX EXCEL TELECOMMUNICATIONS INC EXL RICHARDSON, TX EXCEL TELECOMMUNICATIONS INC (PREV CGY DALLAS, TX COMMUNICATIONS MANAGEMENT) EXCELINK COMMUNICATIONS INC EIK CLEARWATER, FL EXCELL AGENT SERVICES, L.L.C. EVI TEMPE, AZ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–75 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location EXCELLER CORP EXC EXCO LONG DISTANCE EXD DALLAS, TX EXECOMM INC ECC QUINCY, IL EXECULINE INC EXB BILLINGS, MO EXECULINE OF ALASKA EXA KENNEWICK, WA EXECULINE OF FAIRFIELD EFR FAIRFIELD, CA EXECULINE OF LAS VEGAS ELV SAN MATEO, CA EXECULINE OF RENO EXR SPARKS, NV EXECULINE OF SAN FRANCISCO ESF SAN FRANCISCO, CA EXECULINES INC ELI YAKIMA, WA EXECUPAGE ECP FRESNO, CA EXECUTIVE COMMUNICATIONS INC EXT TULSA, OK EXECUTIVE MARKETING SERVICES INC EMK NAPERVILLE, IL EXECUTIVE PAGING & MESSAGE PROCESSING SERVICE EPM CAMDENTON, MO INC EXECUTIVE PRIORITY SYSTEMS EPS SAN FRANCISCO, CA EXECUTIVE SERVICES PAGING COMPANY EXG VIRGINIA BEACH, VA EXECUTIVE TELECARD LTD ECU ROCKVILLE, MD EXECUTONE INFORMATION SYSTEMS INC EIS DARIEN, CT EXECUTONE OF SAN ANTONIO ESN EXECUTONE/NEW HAMPSHIRE INC ENH EXELON COMMUNICATIONS COMPANY, L.L.C. EXY BALA CYNWYD, PA EXOP OF MISSOURI INC EXO KEARNEY, MO EXPETEL COMMUNICATIONS, INC. XPT JACKSON, MS EXPRESS COMMUNICATIONS INC EXP SIOUX FALLS, SD EXPRESS MESSAGE CORP EXS SPRING, TX EXPRESS SERVICE COMPANY EXV DALLAS, TX EXPRESS TELCOM INC ETI EXPRESS TELECOMMUNICATION, INC EPA FORT WORTH, TX EXPRESSCALL, INC. EXI PHOENIX, AZ EXPRIMER COMMUNICATIONS, INC. ERU BROOKLYN, NY EXTANT EXN AURORA, CO EXTELCOM EXM SALT LAKE CT, UT EXTELCOM DBA EXPRESS TEL (PREV. NATIONAL NLN SALT LAKE CITY, UT NETWORK CORP.) EXTELCOM DBA EXPRESS TEL (PREV. THRIFTY CUZ SALT LAKE CITY, UT TELEPHONE) EXTELCOM DBA EXPRESS TEL (PREV. T-TEL) TRF SALT LAKE CITY, UT E-Z ACCESS USA, INC. EZA AUGUSTA, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–76 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location E-Z CALL COMMUNICATIONS INC. EZC COUNCIL GROVE, KS E-Z CONNECT, INC. EZE ATLANTA, GA E-Z PHONE CONNECTIONS (E-Z PHONE) EZO PAPILLION, NE EZ PHONE, INC. EZP AKRON, OH EZIAZ INC. EZZ CHICAGO, IL EZ-TALK COMMUNICATIONS, L.L.C. EZT STAFFORD, TX EZ-TEL COMMUNICATIONS EZL JACSONVILLE, FL EZTEL NETWORK SERVICES, LLC. EZW BROOKNEAL, VA F D F COMMUNICATIONS CO FDF BERNIE, MO F. TURNER CORPORATION INC. DBA TCS OF NEW JERSEY FUE ORANGE, NJ FACILICOM INTERNATIONAL, L.L.C. FLI WASHINGTON, DC FAIR FINANCIAL, L.L.C. DBA MIDSTATE FFE MADISON, TN TELECOMMUNICATIONS FAIRCALL CORPORATION FLP DELRAY BEACH, FL FAIRCHILD COMMUNICATIONS SERVICES COMPANY FCD LONG BEACH, CA FAIRPOINT COMMUNICATIONS SOLUTIONS CORP MJD CHATHAM, NY (FAIRPOINT COMM. CORP) FAIRVIEW TELCOM FVW PLANO, TX FAITHNET TELECOMMUNICATIONS, INC. FTS PLANO, TX FAMILY TELEPHONE NETWORK FTN FAMILYTEL OF TEXAS, LLC FMX MONROE, LA FANTASTIC PHONE SYSTEMS INC FAN FAR POINT FPO SOUTH LAKE, TX FARGO TEL ANSWERING SVC FTA FARKILL COMMUNICATIONS, INC FRK LIBERTY, NY FARMERS’ AND BUSINESS MEN’S TELEPHONE COMPANY FUS WHEATLAND, IA FARMERS LONG DISTANCE, INC. FIA RAINSVILLE, AL FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY FMV MOULTON, IA FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY FUA HARLAN, IA (HARLAN) FARMERS MUTUAL TECHNOLOGIES, INC. FMU BELLINGHAM, MN FARMERS MUTUAL TELEPHONE COMPANY FMA FRUITLAND, ID FARMERS MUTUAL TELEPHONE COMPANY OF NORA FMH NORA SPRINGS, IA SPRINGS FARMERS MUTUAL TELEPHONE COOP. FML SHELLSBURG, IA FARMERS TELEPHONE CO INC FMT PLEASANT VIEW, CO FARMERS TELEPHONE COMPANY OF ESSEX FEE ESSEX, IA FARMERS TELEPHONE COOPERATIVE INC. FAP RAINSVILLE, AL FARMERS TELEPHONE COOPERATIVE, INC. (SC) FAO KINGSTREE, SC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–77 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FARNSWORTH RADIOPHONE FRP FARRIS LONG DISTANCE FGD DALLAS, TX FAST CONNECTIONS, INC. FSN DALLAS, TX FAST DATA FAD OMAHA, NE FAST PHONES OF NEBRASKA, CORP. FPN LINCOLN, NE FAST PHONES, INC FPI MONTGOMERY, AL FASTLINE COMMUNICATION NETWORK FCN GARLAND, TX FAXNET CORPORATION (PREV. FAIRFIELD COMPUTER FCP BOSTON, MA CORPORATION) FAYETTEVILLE COMMUNICATIONS INC FVC FBF INC. FBX NEWARK, NJ FBN AMERICA, INC. FMI EMMAUS, PA FBN AMERICA, INC. DBA FBN INDIANA FND EMMAUS, PA FEATHER COMMUNICATIONS FTH FEB CORP FEB BELLEVUE, WA FEC COMMUNICATIONS, L.L.P. FEI QUITMAN, TX FEC TELECOM, INC. FEM ORLAND, FL FEDERAL AVIATION ADMINISTRATION C/0 MCI FAA RICHARDSON, TX FEDERAL EXPRESS CORP FLE MENPHIS, TN FEDERAL LONG DISTANCE OPERATOR FDO AUSTIN, TX FEDERAL TRANSTEL INC FTT ATLANTA, GA FEEK’S MOBILE DISPATCH FMD FELIX EARL LABOME DBA F & L COMMUNICATIONS FLU HOUSTON, TX FERGUS FALLS LDS FFL FERGUS FALLS, MN FERNS INC FRN FIBER AMERICA, INC. FAI SAN MARCOS, TX FIBER COMMUNICAITONS, INC. FOM ROSEVILLE, CA FIBER DATA COMMUNICATIONS, INC. FDU CORPUS CHRISTI, TX FIBER FOUR CORPORATION FFR ROCK PORT, MO FIBER SOUTH FBS RALEIGH, NC FIBER TECHNOLOGIES NETWORKS, L.L.C. FNW ROCHESTER, NY FIBER TECHNOLOGIES, LLC FBO ROCHESTER, NY FIBERCOM L.C. FBM SIOUX CITY, IA FIBERFONE OF FLORIDA INC FBF MIAMI, FL FIBERLINE INC FLN SAN ANTONIO, TX FIBERLINE NETWORK COMMUNICATIONS L P FNC CARSON CITY, NV FIBERLINK CONNECTION LLC FLK FORT MORGAN, CO FIBERNET COMMUNICATIONS INC FCC METUCHEN, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–78 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FIBERNET TELECOM, INC. FBN NEW YORK, NY FIBERNET TELECOMMUNICATIONS INC. FBI PHOENIX, AZ FIBERNET TELEMANAGEMENT INC FBT SANTA MONICA, CA FIBERNET, INC. FIB CEDAR HILL, TX FIBERNET, LLC FET CHARLESTON, WV FIBEROPTIC ALTERNATIVE SYSTEM TECHNOLOGIES INC FAS ST LOUIS, MO FIBEROPTIC NETWORK, INC. FRW WINTER PARK, FL FIBERRIDE, INC. FDE SAN CLEMENTE, CA FIBERTECH TELECOM INC FTI HOUSTON, TX FIBERTEL, INC. FTX SAN DIEGO, CA FIBERWATS FWT SAN ANTONIO, TX FIBRCOM FBC SAN ANTONIO, TX FIBREBOND CORP FBR SHREVEPORT, LA FIDELITY COMMUNICATION SERVICES II, INC. FSI SULLIVAN, MO FIDELITY COMMUNICATIONS SERVICES 1, INC. FSO ROLLA, MO FIDELITY LONG DISTANCE, INC. FID SULLIVAN, MO FIDELITY MOBILE SYSTEMS FDL JEFFERSON CITY, MO FIFTH THIRD BANK FDB CINCINNATI, OH FIRST AMERICAN TELECOMMUNICATIONS FAM DALLAS, TX FIRST CALL COMMUNICATIONS INC FCL FARMINGTON HILLS, MI FIRST CELLULAR LP FSC VIENNA, VA FIRST CELLULAR OF SOUTHERN ILLINOIS FCS MT VERNON, IL FIRST CELLULAR OMAHA FCO OMAHA, NE FIRST CHOICE COMMUNICATIONS INC. FCH NEW ORLEANS, LA FIRST CHOICE LOCAL COMMUNICATIONS, INC. FHL MALUERN, PA FIRST CHOICE TECHNOLOGIES, INC. FCZ ELIZABETHTOWN, KY FIRST COMMUNICATIONS GROUP INC FCG NORTHBROOK, IL FIRST COMMUNICATIONS INC FST OMAHA, NE FIRST COMMUNICATIONS, LLC (PREV BN1 NWO AKRON, OH TELECOMMUNICATIONS, INC) FIRST DATA RESOURCES INC FDR OMAHA, NE FIRST DIGITAL NETWORK FDG LAS VAGAS, NV FIRST FEDERAL SAVINGS & LOAN ASSOC OF PITTSBURGH FFP PITTSBURGH, PA INC FIRST FINANCIAL MANAGEMENT CORP FFM ATLANTA, GA FIRST FONE OF AMARILLO FFA AMARILLO, TX FIRST HAWAIIAN BANK FHB HONOLULU, HI FIRST INTERNATIONAL TELECOM INC DBA IGAEA IGE NASHVILLE, TN FIRST INTERSTATE SERVICES CORP FIR PORTLAND, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 8–79 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FIRST LINE COMMUNICATIONS, LLC FIL EGG HARBOR, NJ FIRST NATIONAL BANK OF MARYLAND FNB BALTIMORE, MD FIRST OF AMERICA BANK - SE MICHIGAN N A FSA PONTIAC, MI FIRST PAGE FSP ALEXANDRIA, VA FIRST PAGE, INC. FGI FORT SMITH, AR FIRST PAGE, L.P. (PREV. FIRST PAGE INC.) FPG WICHITA, KS FIRST REGIONAL TELECOM, LLC FIN WASHINGTON, DC FIRST RESERVE CORPORATION FRC FIRST TECHNOLOGY, INCORPORATED HBK HOLLYWOOD, FL FIRST TELECOMMUNICATIONS NETWORK FTK DALLAS, TX FIRST TELECOMMUNICATIONS SERVICES INC. FIT CHICAGO, IL FIRST TELEPHONE COMPANY FTY MIAMI, FL FIRST USA FTU DALLAS, TX FIRST WAY SERVICES FWS HIGHLAND SPRINGS, VA FIRSTCOM, INC. FRZ MINNEAPOLIS, MN FIRSTDIGITAL TELECOM, LLC. FDI SALT LAKE CITY, UT FIRSTWORLD COMMUNICATIONS INC (PREV FIRSTWORLD SNB SAN DIEGO, CA SO CAL PREV..) FISHER MEDICAL FHM NEW YORK, NY FITCH F. CARY FFC CORPUS CHRISTI, TX FIVE AREA LONG DISTANCE, INC. FVA MULESHOE, TX FIVE STAR TELECOM, INC SRW LOS ANGELES, CA FIVECOM ASSOCIATES (NOW BROOKS FIBER FCA WALTHAM, MA PROPERTIES, INC-BFP) FLAG TELECOM NETWORK USA LIMITED FTW WILMINGTON, DE FLAGLER COMMUNICATIONS FLG FLAGSTAFF NETWORK EXCHANGE FTF FLAGSTAFF, AZ FLASHNET TELECOM, INC FLH FORT WORTH, TX FLAT RATE COMMUNICATIONS, INC. FRO COLORADO SPRINGS, CO FLAT RATE NETWORK (PREV FLAT RATE FTR DALLAS, TX COMMUNICATIONS) FLAT ROCK COMMUNICATIONS, INC FRU FLAT ROCK, IL FLATEL, INC. FAL LAKE WORTH, FL FLEETWOOD LONG DISTANCE OPERATOR FWL AUSTIN, TX FLORENCE METRONET INC FMN MORRISVILLE, NC FLORIDA CELLULAR FLC PLANTATION, FL FLORIDA CELLULAR (GA) FOL SAVANNAH, GA FLORIDA CONSOLIDATED MULTIMEDIA SERVICES INC FCE GAINESVILLE, FL FLORIDA DIGITAL NETWORK FDN LONGWOOD, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–80 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FLORIDA DIGITAL NETWORKS FDW ORLANDO, FL FLORIDA LONG DISTANCE FLD ORLANDO, FL FLORIDA RADIO PHONE FRD FLORIDA TELCOM LONG DISTANCE INC FLT FLORIDA TELEPHONE SERVICE FOT ALTAMONTE SPRINGS, FL FM CABLES INC FMC FNCI-FIBER-OPTIC NETWORK COMMUNICATIONS INC FOP SAN DIEGO, CA FOCAL COMMUNICATIONS CORP FOC CHICAGO, IL FONE AMERICA INC FAC SEATTLE, WA FONE INTERNATIONAL INC FON SCOTTSDALE, AZ FONE.NET, LLC. FNN CORTEZ, CO FONENET INC FNI CHICAGO, IL FONES 4 ALL CORP FOA CALABASAS, CA FONES WESTDIGITAL SYSTEMS (PREV FONES WEST) FSW DENVER, CO FON-EX INC FNX NEW HOPE, PA FONG-WINTERS ENTERPRISES (NOW WESTERN WIRELESS FGW SAN FRANCISCO, CA CORP. - PCF) FONOROLA FNR BUFFOLO, NY FONOROLA FRL MONTREAL, PQ FOOTHILL CELLULAR & PAGING FHC UPLAND, CA FOOTHILL TELEPHONE EXCHANGE FTE PLACEVILLE, CA FOOTHILLS RURAL TELEPHONE COOPERATIVE FOH STAFFORDSVILE, KY CORPORATION FOREST CITY TELECOM INC FCT LAKE MILLS, IA FOREST PINE TELCOM FPT FOREST HILL, TX FORESTER RADIO FRR FORESTHILL TELEPHONE CO FRH FORRESTHILL, CA FORMS ASSOCIATES, INC. FRA OMAHA, NE FORSYTHE COMMUNICATIONS INC FRY ENGLEWOOD, CO FORT BEND LONG DISTANCE DBA TXU COMMUNICATIONS FTB ROSENBERG, TX FORT BEND TELEPHONE COMPANY FBP ROSENBERG, TX FORT MOJAVE LONG DISTANCE, INC. FMJ FORT MOHAVE, AZ FORT MYERS CELLULAR TELEPHONE CO FMS FT MYERS, FL FORT POINT TELEPHONE COMPANY, INC. FPC BOSTON, MA FORT SMITH BEEPERS INC FSB FORT WAYNE MEDICAL SOCIETY FWM FORT WAYNE, IN FORTE COMMUNICATIONS, INC. FOR EVANSTON, IL FORTUNELINX INC. FLZ FORT LAUDERDALE, FL FOX COMMUNICATIONS CORP FOX BELLEVUE, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–81 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FPL FIBERNET, LLC FPL MIAMI, FL FRAMCO, INC FMO FARGO, ND FRANCE TELECOM INC FRI NEW YORK, NY FRANCIS COMMUNICATIONS I, LTD FIS EL PASO, TX FRANK DILL TRAVEL AGENCY INC FDA FRANKLIN MOBILPHONE FMP FRANK’S COMMUNICATIONS FKC HAYS, KS FRED BURG COMMUNICATIONS FRB STONEWALL, TX FRED ROSCOE DBA MOBILE PHONE ANSWERING CO FRM FREDERICK ELECTRONICS FDK N MANCHESTER, IN FREE BEEPER, INC FBE WEST VALLEY CITY, UT FREE STATE TELEPHONE COMPANY FEO HALEYVILLE, AL FREE TRADE COMMUNICATIONS FRE DALLAS, TX FREEDOM RING COMMUNICATIONS, LLC DBA BAYRING FER PORTSMOUTH, NH COMMUNICATIONS FREEDOM TELECOMMUNICATIONS INC FRT WALNUT CREEK, CA FREEDOM TELECOMMUNICATIONS, INC. FDM CEDAR HILL, TX FREEPORT.COM, INC. FPR PROVO, UT FRESH START COMMUNICATIONS, INC. FSM PHOENIX, AZ FRESNO MOBILE RADIO FMR FRETEL COMMUNICATIONS, LLC FLO ST. ANTHONY, ID FREY’S ELECTRONICS FYE ABERDEAN, SD FRIEND TECHNOLOGIES INC FDT SAN FRANCISCO, CA FRIENDLY VOICE NETWORK FVN KENNEDALE, TX FRIENDSHIP LONG DISTANCE FDP ALLEN, TX FROMM SERVICES FSV FRONT PAGE AALERT PAGING CO FPA RANCHO CORDOVA, CA FRONTERA TELECOMMUNICATIONS, INC FOS KERRVILLE, TX FRONTIER COMMUN OF AMERICA INC (PREV FRONTIER FLR ROCHESTER, NY LD OF AMERICA) FRONTIER COMMUNICATIONS INTERNATIONAL, RTC ROCHESTER, NY INC.(PREV. RCI CORP) FRONTIER COMMUNICATIONS OF ALABAMA, INC. FAB MONROEVILLE, AL FRONTIER COMMUNICATIONS OF LAMAR COUNTY, INC. FLM MILLPORT, AL FRONTIER COMMUNICATIONS OF MISSISSIPPI FZM RIENZI, MS FRONTIER COMMUNICATIONS OF NEW ENGLAND, BUR ROCHESTER, NY INC.(PREV. BURLINGTON) FRONTIER COMMUNICATIONS OF THE GREAT LAKES, SCH ROCHESTER, NY INC.

Proprietary — Licensed Material See proprietary restrictions on title page. 8–82 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FRONTIER COMMUNICATIONS OF THE GREAT LAKES, SUR OSHKOSH, WI INC.(PREV SUPERIOR) FRONTIER COMMUNICATIONS OF THE MID ATLANTIC, MAD ROCHESTER, NY INC. FRONTIER COMMUNICATIONS OF THE SOUTH INC (PREV SLD MONROEVILLE, AL SOUTHLAND TEL CO) FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION ASI ROCHESTER, NY INC FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, ENW ROCHESTER, NY INC FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, TTW ROCHESTER, NY INC(PREV TCI TELEC) FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, AVD ROCHESTER, NY INC. FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, AVZ ROCHESTER, NY INC. FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, ESM ROCHESTER, NY INC. FRONTIER LOCAL SERVICES INC. FLS BINGHAM FARMS, MI FRONTIER PAGING FNP LAMAR, CO FRONTIER TELEPHONE OF ROCHESTER, INC FTO ROCHESTER, NY FRONTLINE COMMUNICATIONS INTERNATIONAL FCQ NEW YORK, NY FRS SYSTEMS INC FRS FSS CELLULAR INC OF LUBBOCK FSS LUBBOCK, TX FTC COMMUNICATIONS, INC (PREV FARMERS LONG FAR SUMTER, SC DISTANCE) FTC DIVERSIFIED SERVICES, INC. FDS KINGSTEE, SC FTC LONG DISTANCE (FUTURE TELEPHONE FTG DALLAS, TX COMMUNICATIONS) FTTH COMMUNICATIONS LLC FHT ROSEMONT, MN FULL SERVICE COMPUTING FUL PITTSBURGH, PA FULLTEL INC FLL OKLAHOMA CITY, OK FULMONT COMMUNICATIONS INC FCM FUNDAMENTAL BROKERS FLB NEW YORK, NY FUSION TELECOM FNL DEL RAY BEACH, FL FUTRONICS, INC. FIC FREMONT, OH FUTURE COMMUNICATIONS INC FCI DWIGHT, IL FUTURE CONNECT FUT PLANO, TX FUTURE MOBILE DISPATCH FEC FUTURES TECHNOLOGY, INC. FUN BOHEMIA, NY FUTUREWAY COMMUNICATIONS INC. FWC CONCORDE, ON

Proprietary — Licensed Material See proprietary restrictions on title page. 8–83 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location FUTURTEK (AMERICAN COMMUNICATION ENTERPRISE) AEP SAN MATEO, CA FUZION WIRELESS COMMUNICATIONS, INC. FUZ BOCA RATON, FL G & W COMMUNICATIONS CO (MERGED WITH BROWER GWL CANTON, OH NETWORK 1) G E AMERICAN COMMUNICATIONS INC GEA PRINCETON, NJ G. R. MISSOURI HOLDINGS, L. L. C. GRH PRINCETON, MO GABRIEL COMMUNICATIONS GBL GABRIEL COMMUNICATIONS GBU CHESTERFIELD, MO GABRIEL WIRELESS LLC GAB BOCA RATON, FL GAINESVILLE REGIONAL UTILITIES DBA GRUCOM (CAP) GSV GAINESVILLE, FL GALA COMMUNICATIONS GAC DALLAS, TX GALAXY TELECOMMS-CTR LIMITED GAL GALLATIN RIVER COMMUNICATIONS LLC GRO DES PLAINES, IL GALLIC COMMUNICATIONS GLM GILLETTE, NJ GALVESTON CELLULAR GLV GALVESTON, TX GANOCO, INC. GOO SAFETY HARBOR, FL GAS COMPANY OF NEW MEXICO GNM ALBUQUERQUE, NM GASCARD GSD CARLSBAD, CA GATEWAY COMMUNICATIONS LTD GWY GARLAND, TX GATEWAY COMMUNICATIONS, INC. GTY WICHITA, KS GATEWAY LONG DISTANCE SERVICES INC GTW LAKE ST. LOUIS, MO GATEWAY TELECOM, LLC GWT WHEELING, WV GATEWAY TELEPHONE GYT NORTH BAY, ON GAVIN COMMUNICATIONS GVC GAYSHEN CORP (NEW NAME TTU) GYS GBM COMMUNICATIONS INC GBM GBS COMMUNICATIONS GBS GCI COMMUNICATIONS INC GCK ANCHORAGE, AK GCI GLOBALCOM INC GCG CHICAGO, IL GCI NETWORK GCI GCR TELECOMMUNICATIONS INC GCX SOUTH BOSTON, VA GE CAPITAL COMMUNICATION SERVICES CORPORATION GES MARIETTA, GA GE EXCHANGE GEH STAMFORD, CT GEETEL COMMUNICATIONS, INC. GEM FRANKFORT, IN GEICO GCO WASHINGTON, DC GEM STATE TELEPHONE INC GMS MOSCOW, ID GEMINI COMMUNICATIONS GMI FORT COLLINS, CO GEN COM GEN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–84 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GENCELL GLL SAN DIEGO, CA GENCOM INC GCM GENCOM INC - OAKLAND GNO GENCOM INC - SAN DIEGO GNS GENCON INC (NOW WESTERN WIRELESS CORP. - PCF) GNC ST. LOUIS, MO GENERAL CELLULAR CORP(NOW WESTERN WIRELESS GNL FAIRFIELD, CA CORP. - PCF) GENERAL COMMUNICATIONS & ELECTRONICS CORP. GME PINE BROOK, NJ GENERAL COMMUNICATIONS INC GCN ANCHORAGE, AK GENERAL COMMUNICATIONS SERVICES GRL GARLAND, TX GENERAL COMMUNICATIONS SYSTEMS INC GCS GENERAL ELECTRIC CORP GET PRINCETON, NJ GENERAL ELECTRIC INFORMATION SERVICES GEI ROCKVILLE, MD GENERAL SERVICES ADMINISTRATION GSA WASHINGTON, DC GENERAL SERVICES COMMISSION GSR AUSTIN, TX GENERAL TELECOM GNE NEW YORK, NY GENERAL TELEPHONE INC GTL GENESEE TELEPHONE COMPANY/CELLULARONE GEE ROCHESTER, NY GENESIS COMMUNICATIONS INTERNATIONAL, INC. GSS OLIVENHAIN, CA GENESIS TELECOMMUNICATIONS, LLC EEX GREENWOOD, SC GENUITY SOLUTIONS INC GSX BURLINGTON, MA GENUITY SOLUTIONS INC (PREV GTE INTELLIGENT GIE IRVING, TX NETWORK SERVICES INC) GENUITY TELECOM, INC. (PREV GTE TELECOM INC) GTT INDIANAPOLIS, IN GENUITY TELECOM, INC. (PREV GTE TELECOM) ASC ROCKVILLE, MD GEO COMMUNICATIONS INC GEO SAN ANTONIO, TX GEORGE W. BUSH PROPERTIES, INC. GWB MCKINNEY, TX GEORGETOWN COMMUNICATIONS MANAGEMENT CORP GMC GEORGIA INDEPENDENT PCS, INC. GGI MACON, GA GEORGIA PAGING COMPANY OF SAVANNAH GPC GEORGIA PUBLIC WEB, INC. GPW ATLANTA, GA GEORGIA TELEPHONE SERVICES, INC. GAE VALDOSTA, GA GEOTEK COMMUNICATIONS, INC. GTK MONTVALE, NJ GEOTEL COMMUNICATION SERVICES, INC. GCV VENTURA, CA GERMANTOWN LONG DISTANCE COMPANY GLI GERMANTOWN, OH GERVAIS TELEPHONE COMPANY GVY GERVAIS, OR GGB SERVICE COMPANY GGB DALLAS, TX GIANT BEAR.COM GBD WHITE PLAINS, NY GIANT COMMUNICATIONS, INC. GIA HOLTON, KS

Proprietary — Licensed Material See proprietary restrictions on title page. 8–85 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GIANTLOOP TELECOM, INC. GLW WALTHAM, MA GIL LEHFELDT GLT GILA COMMUNICATIONS GLA GILA RIVER CELLULAR GENERAL PARTNERSHIP GVU OKLAHOMA CITY, OK GILCO GIL BAKERSFIELD, CA GILES-CRAIG COMMUNICATIONS, INC. GAO PEMBROKE, VA GILLETTE GLOBAL NETWORK, INC. GGN NEW YORK, NY GILLETTE RADIO TELEPHONE CO GRT GIPCO HOLDINGS INTERNATIONAL LTD GHO HAMILTON, GA GL COMMUNICATIONS INC GLX GAITHERSBURG, MD GLADYS B JOINES GBJ GLEN CANYON COMMUNICATIONS GCY PAGE, AZ GLEN FALLS HOSPITAL GFH GLENS FALLS, NY GLEN LAKES NETWORK SERVICE GLS DALLAS, TX GLENNERIC COMMUNICATIONS INC. GLR SANTA FE SPRINGS, CA GLENS FALLS LONG DISTANCE SERVICE GFS GLEN FALLS, NY GLENWOOD MOBILE RADIO CO GMR GLENWOOD TELEPHONE CO. GWD GLENWOOD, GA GLOBAL ACCESS TELECOM & VOIP CORPORATION VOI BELLFLOWER, CA GLOBAL BROADBAND, INC. GDB NEW YORK, NY GLOBAL COM GBC LONGVIEW, TX GLOBAL COM DE PUERTO RICO GPR FT LAUDERDALE, FL GLOBAL COMMUNICATIONS GLB GLOBAL CONNECTION INC OF AMERICA GOR ATLANTA, GA GLOBAL CROSSING LTD GBG MORRISTOWN, NJ GLOBAL CROSSING TELECOMMUNICATIONS (PREV ALN ROCHESTER, NY FRONTIER COMM SERVICES) GLOBAL EXCHANGE CARRIER INC GER MANASSAS, VA GLOBAL INFORMATION SERVICES INC. GIS PALISADES PARK, NJ GLOBAL INTERNET COMMUNICATIONS, INC. GIC MARIETTA, GA GLOBAL INTERNET COMMUNICATIONS, INC. (CA) GBI NEWARK, CA GLOBAL INTERNETWORKING, INC. GBW VIENNA, VA GLOBAL LINK COMMUNICATIONS, INC. GLU MIAMI, FL GLOBAL MEDIA NETWORK INC GMN MODESTA, CA GLOBAL NAPS INC GNP NORWOOD, MA GLOBAL NET PAGING INC DBA GLOBAL NET GBP LOS VEGAS, NV COMMUNICATIONS GLOBAL NETWORK PROVIDERS, LLC GWP WESTLAKE VILLAGE, CA GLOBAL NETWORK SOLUTIONS GNU RESTON, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–86 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GLOBAL ONE COMMUNICATIONS, L.L.C. GMM RESTON, VA GLOBAL PAYCOM INC. GLP TAMPA, FL GLOBAL PHOTON HOLDING CO. GPD SAN DIEGO, CA GLOBAL RATE PROCESSING, INC. GBR IRVINE, CA GLOBAL TELDATA, INC. GDA CHICAGO, IL GLOBAL TELECOM LLC GOT MADISON, WI GLOBAL TELECOM SERVICES LTD GTV BALA CYNWYD, PA GLOBAL TELECOMMUNICATION SOLUTIONS, INC. GBO PHILADELPHIA, PA GLOBAL TELELINK SERVICES, INC. GBV ATLANTA, GA GLOBAL TELEMEDIA INTERNATIONAL, INC GWO ALPHARETTA, GA GLOBAL TELENET GLE OXNARD, CA GLOBAL TELENET GTN LOS ANGELES, CA GLOBAL TELEPHONE NETWORK, INC. GTJ LONG ISLAND CITY, NY GLOBAL TONE COMMUNICATIONS, INC. GOM CULPEPER, VA GLOBALCOM INC. GBQ CHICAGO, IL GLOBALCOM INTERNATIONAL, INC. GII SAN ANTONIO, TX GLOBALEYES TELECOMMUNICATIONS, INC. GBY MURPHYSBORO, IL GLOBALNET INTERNATIONAL GNY MARIETTA, GA GLOBAL-NET, INC. GLN PHOENIX, AZ GLOBALSTAR CANADA CO GBA MISSISSAUGA, ON GLOBALSTAR USA, INC (PREV AIRTOUCH SATELLITE AHB WALNUT CREEK, CA SERVICES US, INC) GLOBALTRON COMMUNICATIONS CORP GTU DAVIE, FL GLOBCOM, INC. GMO GLENVIEW, IL GLOBE TELECOMMUNICATIONS, INC. GBE WEST POINT, GA GLOBECOM TELECOMMUNICATIONS INC GCT NEW YORK, NY GLOBE-COMM(USA), INC. GCU RESTON, VA GLOBENET GBN CHICAGO, IL GLOBETEL INCORPORATED GLO DUNN LORING, VA GLOBIX CORPORATION GXC NEW YORK, NY GLYPHICS COMMUNICATIONS, INC. GLY DRAPER, UT GMS COM INC GMQ LA HABRA HEIGHTS, CA GMS ENTERPRISES CORP GSE FORT LAUDERDALE, FL GMW CO GMW LUBBOTK, TX GOBEAM SERVICES INC GBZ SAN RAMON, CA GOLD COAST MOBILE TELEPHONE SYSTEM GLC GOLD TEL CORPORATION GOA MILL CREEK, WA GOLDEN HARBOR OF ALABAMA, INC GHA SAN MARCOS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–87 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GOLDEN HARBOR OF ILLINOIS, INC. GHN SAN MARCOS, TX GOLDEN HARBOR OF NORTH CAROLINA, INC. GNA SAN MARCOS, TX GOLDEN HARBOR OF WASHINGTON, INC. GHW SAN MARCOS, TX GOLDEN HARBOR OF WISCONSIN, INC. GHS SAN MARCOS, TX GOLDEN VALLEY RADIO GVR TURLOCK, CA GOLDEN VOICE GON GOLDEN, CO GOLDEN WEST GNW RAPID CITY, SD GOLDFIELD ACCESS NETWORK, L.C. GAN GOLDFIELD, IA GOLDFIELD TELEPHONE COMPANY GOD GOLDFIELD, IA GOLDSTAR COMMUNICATIONS, LLC. GSN NEW KNOXVILLE, OH GOLDTONE COMMUNICATIONS, INC. GOS BROOKLYN, NY GOOD CONNECTIONS INC GOC GOPIN CORPORATION GPQ OTTAWA, ON GO-TEL, INC. GOE DALLAS, TX GOTHAM TELEPHONE COMPANY, INC. GOH NEW HYDE PARK, NY GOURMET EXPRESS INC DBA QUINTESSENTIAL TELECOM GEQ LAS VEGAS, NV CONSULTING TELECOM GPU TELCOM INC GPU READING, PA GRACEBA LONG DISTANCE, INC. GRD ASHFORD, AL GRACEBA TOTAL COMMUNICATIONS GTD DOTHAN, AL GRAFTON LONG DISTANCE COMPANY INC. GRF GRAFTON, IL GRAFTON TECHNOLOGIES, INC. GFO GRAFTON, IL GRAND RIVER COMMUNICATIONS, INC. GIO PRINCETON, MO GRAND VALLEY INTERNET, INC. GVI GRAND JUNCTION, CO GRANDE COMMUN NETWORK INC (PREV GOLDEN GHT SAN MARCOS, TX HARBOR -TEXAS INC) GRANDE COMMUNICATIONS GDC HARLINGEN, TX GRANDE COMMUNICATIONS NETWORKS INC(PREV GHF SAN MARCOS, TX GOLDEN HARBOR -FLORIDA... GRANDE COMMUNICATIONS NETWORKS INC(PREV GHI SAN MARCOS, TX GOLDEN HARBOR INDIANA) GRANDE COMMUNICATIONS NETWORKS INC(PREV GHG SAN MARCOS, TX GOLDEN HARBOR OF GEORGIA) GRANDE COMMUNICATIONS NETWORKS, INC (PREV MOI SAN MARCOS, TX THRIFTY CALL, INC) GRANDE COMMUNICATIONS NETWORKS, INC. GEW SAN MARCOS, TX GRANDE RIVER COMMUNICATIONS, INC. GRA RAYMONDVILLE, TX GRANDE RIVER TELECOM, L.P. GRV RAYMONDVILLE, TX GRANDVIEW MUTUAL TELEPHONE COMPANY GMU PARIS, IL GRANITE FALLS TELEPHONE COMPANY GFT REDMOND, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–88 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GRANITE STATE LONG DISTANCE GRN WEARE, NH GRANITE STATE TELEPHONE, INC. GAI WEARE, NH GRANITE TELECOMMUNICATIONS LLC. GIM QUINCY, MA GRANNY SAYER’S G N B’S GSY SODDY DALSYE, TN GRANTSBURG TELCOM, INC. GNN GRANTSBURG, WI GRAPHIC RESULTS CORPORATION GRR MIAMI, FL GRAPHIC SCANNING CORP GSC GRAPHNET INC GPH TEANECK, NJ GRAYBILL ELECTRONICS INC GYE HIAWATHA, IA GREAT ATLANTIC & PACIFIC CO INC (THE) GAP MONTVALE, NJ GREAT EASTERN COMMUNICATIONS GRE GREAT EASTERN COMMUNICATIONS CO GEC WATERFORD, VA GREAT LAKES COMNET, INC (PREV MICHIGAN MIW OKEMOS, MI INDEPENDENT NETWORK, INC.) GREAT LAKES TELECOMMUNICATIONS GLK ROLLING MEADOWS, IL GREAT PLAINS CELLULAR LP GRP PHILADELPHIA, PA GREAT PLAINS COMMUNICATIONS LONG DISTANCE, INC. GPN BLAIR, NE GREAT WEST SERVICES, LTD. GWE DALLAS, TX GREATER MEDIA TELEPHONE INC GDT WORCESTER, MA GREATER MINNESOTA CELLULAR CORP GML BROOKINGS, SD GREEN HILLS COMMUNICATIONS, INC. GHC BRECKENRIDGE, MO GREEN HILLS TELECOMMUNICATIONS SERVICES GHL BRECKENRIDGE, MO GREEN STATE COMMUNICATIONS, INC. GUN EAST ORANGE, NJ GREENE ELECTRONICS GEL GREYHOUND LINES INC GYL OMAHA, NE GRIC COMMUNICATIONS INC GRQ MILPITAS, CA GRID 4 COMMUNICATIONS, INC. GID BIRMINGHAM, MI GRIDLEY COMMUNICATIONS, INC. GIY GRIDLEY, IL GRISWOLDS GRI GROCERS SUPPLY CO INC GRS HUSTON, TX GROUP ADVANTAGE PROVIDERS LLC GDP FOUNTAIN VALLEY, CA GROUP LONG DISTANCE INC GPL FORT LAUDERDALE, FL GROUP ONE COMMUNICATIONS INC GPO GROVELINE LLC GVL BOCA RATON, FL GRUCOM GRU GAINESVILLE, FL GRUNDY CENTER COMMUNICATIONS UTILITY GYU GRUNDY CENTER, IA GS COMMUNICATIONS, INC. GSO NORTHBROOK, IL GS COMMUNICATIONS, USA, INC. GSU BROOKLYN, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–89 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GS PAGING GSG LA VERNE, CA GSA FINANCIAL MANAGEMENT GFM GSAT GAT GSIWAVE.COM. INC. GWV KENANSVILLE, NC GST CORP GTC ALLENTOWN, PA GST NEW MEXICO LIGHTWAVE, INC. (SUB. OF GST GWI ALBUQUERQUE, NM TELECOM, INC.) GST PACIFIC LIGHTWAVE, INC.(PREV. PACIFIC PLI RIVERSIDE, CA LIGHTWAVE, INC.) GST TELECOM (PREV ABC TELECOM,INC & COACHELLA CHL PALM DESERT, CA VALLEY COMM) GST TELECOM (PREV GST CALL AMERICA & CALL CBU SAN LUIS OBISPO, CA AMERICAN BUS COMMM CORP GST TELECOM (PREV GST NET & GST PACWEST GSM VANCOUVER, WA TELECOM, INC) GST TELECOM (PREV GST NET, INC. & INTL IFC LIMA, OH TELEMANAGEMENT GROUP,INC) GST TELECOM (PREV TEL-OPTIC, INC DBA UNIVERSAL CMA FAYETTEVILLE, AR NETWORK SVCS) GST TELECOM (PREV TOTAL NET) TQL HOUSTON, TX GST TELECOM CALIFORNIA, INC.(PREV. GST LIGHTWAVE GCW PLEASANTON, CA (CA),INC.) GST TELECOM HAWAII, INC(PREV DIGITAL DTU KAPOLEI, HI TELECOMMUNICATIONS INC) GST TELECOM HAWAII, INC. (PREV PACWEST TELECOM PTH HONOLULU, HI HAWAII, INC). GST TEXAS LIGHTWAVE, INC. GTX VANCOUVER, WA GT COM LONG DISTANCE (PREV ST. JOE SJE PORT ST JOE, FL COMMUNICATIONS) GT GROUP TELECOM INC GTG VANCOUVER, BC GT NETWORKS GNK VANCOUVER, BC GTC TELECOM GCF COSTA MESA, CA GTC, INC. GTQ JAY, OK GTE AIRFONE INC GAF OAKBROOK, IL GTE FEDERAL SYSTEMS DIVISION CGT MC LEAN, VA GTE HAWAIIAN TELEPHONE CO INC. DBA GTE PACIFICA- GPG TAMUNING, GU GUAM GTE MEDIA VENTURES INCORPORATED GMV IRVING, TX GTE MOBILENET INC. GMT ROCKFORD, IL GTE MOBILNET INCORPORATED GTB ATLANTA, GA GTE MOBILNET OF SAN DIEGO INCORPORATED GMB SAN DIEGO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–90 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location GTE NORTH GNR FORT WAYNE, IN GTE OF SOUTHWEST GSW SAN ANGELO, TX GTE SATELLITE CORP GTE GTE SERVICE CORP GTO D/FW AIRPORT, TX GTE SPACENET CORP GNT GTE SPRINT INTERNATIONAL GSI GTE TELEMESSAGER GTM STAMFORD, CT GTE TELEPHONE OPERATIONS(PREV GTE INTERNAL GIT IRVING, TX TELECOMMUNICATION SVC) GTECH CORP GTH INDIANAPOLIS, IN GTEL GEX THOUSAND OAKS, CA GTEL COMMUNICATIONS, L.L.C. GOU HOWELL, MI GTI TELECOMMUNICATIONS INC. GTI FEDERAL WAY, WA GUADALUPE VALLEY COMMUNICATIONS SYSTEMS, LP. GVS NEW BRAUNFELS, TX GUADALUPE VALLEY TELEPHONE COOPERATIVE, INC. GVT NEW BRAUNFELS, TX GUAM CELLULAR & PAGING GMG TUMON, GU GUAM TELEPHONE AUTHORITY GTA TAMUNING, GU GUAM WIRELESS TELEPHONE COMPANY LLC GWM ALEXANDRIA, VA GUIDE NETWORK INTERNATIONAL GNI MESQUITE, TX GULF CENTRAL INTERNATIONAL GCL GULF COAST COMMUNICATIONS GLF GULF COAST COMMUNICATIONS, INC. (FL) GUS PENSACLA, FL GULF COAST ELECTRONICS GCE GULF COAST LONG DISTANCE INC GUC TAMPA, FL GULF COAST RADIOFONE GCR NEDERLAND, TX GULF COMMUNICATIONS SERVICES GUL SAN CARLOS, CA GULF LONG DISTANCE INC GLG FOLEY, AL GULF MOBILEPHONE OF ALABAMA INC GMP GULF OIL COMMUNICATIONS INC GOL HOUSTON, TX GULF OIL CORP GUF LAFFETTE, LA GULFCOAST PAGING, INC. GPI TAMPA, FL GULFPINES COMMUNICATIONS (PREV DIAMOND DMV BAY SPRINGS, MS TELEPHONE SERVICES INC) GUTHRIE TELECOMMUNICATIONS NETWORK, INC. GUT GUTHRIE CENTER, IA H & M TELECOMMUNICATION SERVICES CO HMT HIGLANDS RANCH, CO H P COIN PHONE COMPANY HPP N. RICHLAND HILLS, TX H&R BLOCK INC HRB KANSAS CITY, MO H.S.S. VENDING DISTRIUTORS HSV CORAOPOLIS, PA HAGERSTOWN CELLULAR PARTNERSHIP HCP PROVIDENCE, RI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–91 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location HAGERSTOWN PARTNERSHIP HGN GREENSBORO, NC HAINKE, GARY W DBA ENTERPRISE COMMUNICATIONS EHG WICHITA, KS CO HALL/MORGAN LONG DISTANCE HMG DALLAS, TX HAL-RAD HLR RENO, NV HAMILTON COUNTY COMMUNICATIONS, INC. HOU DAHLGREN, IL HAMILTON COUNTY TELEPHONE CO-OP HMY DALGREN, IL HAMILTON TELECOMMUNICATIONS (PREV. HAMILTON HML AURORA, NE TELEPHONE CO) HANCOCK COMMUNICATIONS, INC (PREV DIVERSIFIED DVF MAXWELL, IN COMMUNICATIONS INC) HANCOCK RURAL TELEPHONE CORP. HNR MAXWELL, IN HANDY PAGE HNP TEMPE, AZ HARBOR BAY TELECOMMUNICATIONS HBY ALMEDA, CA HARBOR COMMUNICATIONS INC HCM ST. JOSEPH, MI HARBOR COMMUNICATIONS, LLC. HRU MOBILE, AL HARCOURT TELCO, LLC DBA MAVERIX.NET (PREV MVO CHICAGO, IL MAVERIX.COM, INC) HARDY TELECOMMUNICATIONS, INC. HDY LOST RIVER, WV HARGRAY, INC. HAY HILTON HEAD, SC HARLAN MUNICIPAL UTILITY HMU HARLAN, IA HARMER COMMUNICATIONS HRM KAHULUI, HI HARMONIC SYSTEMS INC.(PREV. PNC ASSOC. INC.) POS MINNEAPOLIS, MN HARMONY INTERNATIONAL HYI CORPUS CHRISTI, TX HAROLD’S RADIO SERVICE INC HRS HAR-RELL TELCOM INC HRT ARLINGTON, TX HARRIS COMMUNICATIONS CO HRR DURHAM, NC HARRIS COMMUNICATIONS PHONE HOME HPH VISALLA, CA HARRIS CORPORATION - TELECOMMUNICATION SYSTEMS HSC MELBOURNE, FL DIVISION HARRIS DIGITAL TELE HRD NAVATO, CA HARRISON PROPERLY DEVELOPMENT, INC. HPD MONROEVILLE, NJ HART COMMUNICATIONS CO HCN AUSTIN, TX HART COMMUNICATIONS, INC. DBA HART TELEPHONE HLG HARTWELL, GA LONG DISTANCE HART INDUSTRIES INC HII HARVARDNET INC HVN PORTLAND, ME HARVEST TELECOM, INC. HAR ENID, OK HASP INC HAP HASTEL CORPORATION HSL HOSPERS, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–92 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location HAT-COM, INC DBA SENSIBLE COMMUNICATIONS HSN MADISON, GA HAUG COMMUNICATIONS, INC. HAU SENECA, KS HAVERHILL ANSWERING SERVICES HAS HAVRE ANS SERVICE HVA HAWAIIAN TEL CO HWT HAWAIIAN WIRELESS, INC. HWI HONOLULU, HI HAWARDEN MUNICIPAL UTILITIES HWU HAWARDEN, IA HAWKEYE SWITCHING LLC HWS EMERSON, IA HAWKINS COMMUNICATIONS HAW HAWKINS COMMUNICATIONS INC HWK LAUREL, MD HAYNEVILLE FIBER TRANSPORT, INC., DBA HAYNEVILLE HYF HAYNEVILLE, AL LONG DISTANCE HAYNEVILLE TELEPHONE COMPANY, INC. HYC HAYNEVILLE, AL HAZARD MOBILE TELEPHONE & PAGING SERVICE INC HMB HAZARD, KY HAZLE-TONE COMMUNICATIONS INC HZT HBC TELECOM, INC. HEE MADISON, WI HBC TEXASTEL, INC. HBX DESOTO, TX HBD TELECOM, INC DBA H & B PAGING HBD MYRTLE BEACH, SC HBF CELLULAR INC HBF WAYNESBORO, MS HCC TELEMANAGEMENT HCT VENTURA, CA HCI HCZ RESTON, VA HCS COMMUNICATIONS MAXI-CARE HCS LOS ANGELES, CA HD HOLDINGS, INC. HDD PALM BEACH, FL HEALTH AND WELFARE AGENCY DATA CENTER HWD SACRAMENTO, CA HEALTH GROUP TELECOMMUNICATIONS CO. OF HGP MEADVILLE, PA NORTHWESTERN PENNSYLVANIA HEALTH LIABILITY MANAGEMENT CORPORATION HLM NAPLES, FL HEART OF IOWA COMMUNICATIONS, INC(PREV HEART OF HRI UNION, IA IOWA TELEPHONE) HEARTLAND COMMUNICATIONS HRL CHICAGO, IL HEBENSTRAIT COMMUNICATIONS CORP. HBC GREENBELT, MD HEBRON CORPORATION HBR OKLAHOMA CITY, OK HEDGES & ASSOCIATES INC HDG SPRINGFIELD, MO HEINS SYSTEMS HEN HELICON NETWORK SOLUTIONS HNS ENGLEWOOD CLIFFS, NJ HELLO INTERNATIONAL, INC. HLO HUNTSVILLE, AL HELMSCO INC HLX WACO, TX HEMINGFORD COOPERATIVE TELEPHONE COMPANY HMO HEMINGFORD, NE HENRY COMMUNICATIONS, INC. HEY DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–93 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location HERITAGE COMMUNICATIONS CORP HRO MELBOURNE, FL HERITAGE COMMUNICATIONS, INC. HRG DUNCANVILLE, TX HERITAGE TECHNOLOGIES, LTD. HAT HOUSTON, TX HERITAGE TELECOMMUNICATIONS CORPORATION HET WASHINGTON, DC HERRING COMMUNICATIONS HGC JONESBORO, AR HERTZ TECHNOLOGIES INCORPORATED HTZ OKLAHOMA CITY, OK HESS COMMUNICATIONS HSS RACINE, WI HEWLETT PACKARD HPC COLORADO SPRS, CO HEYANITA INC HAI LOS ANGELES, CA HF COMMUNICATIONS CORP TRD MIAMI, FL H-F COMMUNICATIONS CORP HFC MIAMI, FL HG TELECOM, INC. HGT FT. WORTH, TX HI TECH COMMUNICATIONS OF IA HIA NEW YORK, NY HIAWATHA TELEPHONE COMPANY HWA MUNISING, MI HIBRIDOS TELECOMMUNICATIONS, INC. HIB CAROLINA, PR HICKORY GROVE GROUP HGG RICHARDSON, TX HICKORY TELEPHONE COMPANY HKY HICKORY, PA HI-COMMUNICATIONS INC HIC HIGH PLAINS MIDWEST, LLC HPW HAYS, KS HIGH SIERRA BUSINESS RADIO HSB HIGH TECK COMMUNICATIONS (WAS HIGH TECK HTI INDUSTRIES) HIGHLAND CELLULAR INC HCR BECKLEY, WV HIGHLAND CELLULAR INC HLN BERKELEY, CA HIGHLAND COMMUNICATIONS HGL HIGHLAND COMMUNICATIONS CORPORATION HCO WARTBURG, TN HIGHLAND DIGITAL PAGING, INC. HDP BURNET, TX HIGHLAND TELEPHONE COOPERATIVE, INC. HTR SUNBRIGHT, TN HIGHRISE COMMUNICATIONS SERVICES, LTD. HUS GIVARD, OH HIGHSPEED.COM, L.L.C. HIG WALLA WALLA, WA HILL REFRIGERATION CORP HRN LOS ANGELES, CA HILLSBORO TELEPHONE CO HLB ST LOUIS, MO HILLSON ENTERPRISES INC HEI HILTON HOTELS CORP HHC HILTON INTERNATIONAL CO HIN HINOTEL, INC. HIO HARLINGEN, TX HI-RIM COMMUNICATIONS INC HMC LAS VEGAS, NV HLC - INTERNET, INCORPORATED HLC IRVINE, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–94 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location HOFFMAN, HARVEY DBA H & S PAGERS HHH CAMP HILL, PA HOLA COMMUNICATIONS INC HLA CAROLINA, PR HOLLIS TELEPHONE COMPANY, INC. HIS WILTON, NH HOLLYWOOD COMMUNICATIONS HCL DALLAS, TX HOLSUM HLS ROSWELL, NM HOLT & COMPANY (I) HOY CLARKSVILLE, TN HOLWAY LONG DISTANCE COMPANY HWG MAITLAND, MO HOLYWELL TELECOMMUNICATIONS CO HTC HOME ORDER & MEDIA EXCHANGE HOM ATLANTA, GA HOME OWNERS LONG DISTANCE INC HOL SAN ANTONIO, TX HOME TELECOMMUNICATIONS OF NEBRASKA HTB BRADY, NE HOME TELENETWORKS, INC. HTW ST. JACOB, IL HOME TELEPHONE COMPANY, INC. HMP MONCKS CORNER, SC HOME TELEPHONE COMPANY, INC. (KS) HOT GALVA, KS HOMEFRONT DSL, INC. HDI CARMEL, IN HOMETEL COMMUNICATIONS LLC HMM ALAMOGORDO, NM HOMETOWN SOLUTIONS, LLC HOE CHOKIO, MN HOMISCO HMS MELROSE, MA HONE COMMUNICATIONS HON SPRINGTOWN, TX HONOLULU CELLULAR HLU HONOLULU, HI HOOD CANAL TELEPHONE CO., INC DBA HOOD CANAL HAN UNION, WA COMMUNICATIONS HOOKS COMMUNICATIONS GROUP, INC. HCG FALLS CHURCH, VA HOPKINSVILLE ELECTRIC SYSTEM HES HOPKINSVILLE, KY HOPPER TELECOMMUNICATIONS COMPANY, INC. HOP WALNUT GROVE, AL HORIZON CELLULAR TELCO HZN FREDERICK, MD HORIZON CELLULAR TELEPHONE CO HRZ BUTLER, PA HORIZON PERSONAL COMMUNICATIONS DBA HORIZON HZL CHILLICOTHE, OH LONG DISTANCE HORIZON PERSONAL COMMUNICATIONS, INC. HZC CHILLICOTHE, OH HORIZON PHONE CARD HPK BROOKLYN, NY HORIZON TELECOMMUNICATIONS, INC. HZM CHARLOTTE, MI HORRY TELEPHONE COOPERATIVE INC HTH CONWAY, SC HORRY TELEPHONE LONG DISTANCE HTP CONWAY, SC HOSPITALITY TELCO HPT MERCER ISLAND, WA HOST NETWORK, INC. HNW BEVERLY HILLS, CA HOSTING NETWORK INC HTK FORT MYERS, FL HOSTTECH COMMUNICATIONS, LLC HOS BARRINGTON, RI HOTEL AMERICA HTA LAS VEGAS, NV

Proprietary — Licensed Material See proprietary restrictions on title page. 8–95 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location HOTEL CONNECT, L.L.C. (PREV LONG DISTANCE LOG DALLAS, TX TRANSFER, INC.) HO-TEL INC HTL HOTEL NETWORKS HNT LOS VEGAS, NV HOUSER COMMUNICATIONS INC HRC PEORIA, IL HOUSTON CELLULAR TELEPHONE CO HNC HOUSTON, TX HOUSTON INTERNATIONAL TELEPORT HIT HOUSTON, TX HOUSTON TELEPHONE AND PAGING, INC. HNG HOUSTON, TX HOWARD JOHNSON’S MOTOR LODGE HJM HOWARD JOHNSON’S MOTOR LODGE (PITTSBURGH) HJP HOWARD YOUNG MEDICAL CENTER HYM WOODRUFF, WI HSA TELECOM OPERATING CO., INC. HSA LITTLETON, CO HTC COMMUNICATIONS CO. HTM WATERLOO, IL HTC COMMUNICATIONS INC HTO HOOPER, NE HTC COMMUNICATIONS, INC. HUI CONWAY, SC HTC SERVICES, INC HTV HALSTAD, MN HTR & L ENTERPRISES INC DBA HART COMMUNICATIONS HTE VALDOSTA, GA HTS, INC. HSI SAINT PAULS, NC HUB DISTRIBUTING INC HUB ONTARIO, CA HUDSON VALLEY DATANET, LLC. HVD MONTGOMERY, NY HUFFMAN COMMUNICATIONS HFM HUGHES COMMUNICATION CARRIER SERVICES HCC WORLDWAY, CA HUGHES COMMUNICATIONS INC HCI HUNTEL SYSTEMS, INC. HUN BLAIR, NE HUNTINGTON CELLULAR HTN GREENSBORO, NC HUNTINGTON TELECOM HUT HUNTINGTON, NY HUNTLEIGH TELECOMMUNICATIONS GROUP INC HTG ST LOUIS, MO HUSTAD INTER COMMUNICATIONS HTD HUTCHINSON TELECOMMUNICATIONS, INC. HTT HUTCHINSON, MN HUXLEY COMMUNICATIONS COOPERATIVE HUX HUXLEY, IA HYATT ORLANDO HYO HYDE PARK BEEPERS & COMPUTERS - L.A. INC HYB INGLEWOOD, CA HYDEN COMMUNICATIONS HYD KENNEDALE, TX HYDE’S STAY IN TOUCH, INC. HST SHREVEPORT, LA HYE-PAGE HYP HAWTHORNE, CA HYPERION COMMUNICATIONS OF ILLINOIS, INC. HYL BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF INDIANA, LP HPI BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF KANSAS, LLC HKS BRIDGEVILLE, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–96 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location HYPERION COMMUNICATIONS OF KENTUCKY, INC. HCK BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF MICHIGAN, INC. HPM BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF MISSISSIPPI, LP HIP BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF NEW YORK, INC. HNY BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF OHIO, INC. HOH BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF PENNSYLVANIA, LLC HPA BRIDGEVILLE, PA HYPERION COMMUNICATIONS OF TENNESSEE, L.P. HYT NASHVILLE, TN HYPERION COMMUNICATIONS OF VIRGINIA, LLC HCV BRIDGEVILLE, PA HYPERION SUSQUEHANNA TELECOMMUNICATIONS HSE YORK, PA HYPERION TELECOMMUNICATIONS OF HARRISBURG HYH HARRISBURG, PA I DON’T CARE (PREV. MELROSE LONG DISTANCE MDO AUSTIN, TX OPERATOR) I DON’T CARE INC. (ON) IDD BRADFORD, ON I DON’T KNOW (PREV. CHOPIN TELCOM) CHF KENNEDALE, TX I.C.U.C., INC. IUN NORTH BELLMORE, NY I:COMM NETWORKS ICK SAN ANTONIO, TX IACT SERVICES ISR ALLEN, TX IAMO TELEPHONE COMPANY IAM COIN, IA IBASIS, INC IBI BURLINGTON, MA IBM (PREV ADVANTIS) ALC SCHAUMBURG, IL ICG COMMUNICATIONS, INC IUI PROVIDENCE, RI ICG TELECOM GROUP, INC(PREV INTELCOM GROUP INC) ICG ENGLEWOOD, CO ICNET, LLC IEL SALISBURY, MD ICOM IOM ICOM HOLDING INC DBA ICOM COMMUNICATIONS ICX NEW YORK, NY ICON COMMUNICATIONS CORP ICU SEATTLE, WA ICORE, INC IOE EMMAUS, PA ICT WORLDWIDE, INC. IWW TAMPA, FL IDAHO COMMUNICATIONS IDH BOISE, ID IDAHO GROWER SHIPPERS ASSOCIATION IGS IDAHO FALLS, ID IDAHO MOBILE TELEPHONE SERVICE IMB BOISE, ID IDAHO PAGING IDP IDAHO STATE GOVERNMENT ISG BOISE, ID IDAHO TELE-PAGING SERVICE IDT IDB COMMUNICATIONS GROUP INC IDB NY, NY IDEAONE TELECOM GROUP, LLC IEG FARGO, ND IDN, LLC IDX COLUMBIA, SC IDS LONG DISTANCE INC IDS HOLLYWOOD, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–97 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location IDT CORPORATION IDR HACKENSACK, NJ IEC COMMUNICATIONS INC IEC SAN FRANCISCO, CA IFC CELLULAR PARTNERS IFP WYCOMBE, PA IFC COMMUNICATIONS IFF MALIBU, CA IG2, INC (PREV COMPUTER BUSINESS SCIENCES, INC) OMB KEW GARDENS, NY IG2, INC. IGI KEW GARDENS, NY ILD TELECOMMUNICATIONS, INC (PREV WORLDCOM INC) STE TULSA, OK ILD TELECOMMUNICATIONS, INC. ILO ADDISON, TX ILINE LLC ILY SAN ANTONIO, TX I-LINK COMMUNICATIONS (PREV FTI COMMUNICATIONS) PRB PHOENIX, AZ I-LINK INC ILI AUSTIN, TX ILINQ TECHNOLOGIES, INC. ILQ DALLAS, TX ILLICOM TELECOMMUNICATIONS, INC. IIM PAXTON, IL ILLINOIS BELL ILB CHICAGO, IL ILLINOIS CONSOLIDATED BUSINESS SYSTEMS ILL MATTOON, IL ILLINOIS FOUR LIMITED PARTNERSHIP ILP MATTOON, IL ILLINOIS INTRANETWORK, INC. ILF PEORIA, IL ILLINOIS PCS, L.L.C. IIP GENESEO, IL ILLINOIS SIGNAL COMMUNICATIONS INC ILS QUINCY, IL ILLINOIS TELEPHONE CORPORATION ILH FRANKLIN PARK, IL ILLINOIS VALLEY CELLULAR ILV MARSEILLES, IL ILLUMINET (PREV. INDEPENDENT INW KANSAS CITY, MO TELECOMMUNICATIONS NETWORK INC.) IMC TELECOM INC IML ROCKVILLE, MD IMPACT NETWORK SOLUTIONS, INC. IPK FINDLAY, OH IMPERIAL COMMUNICATIONS IPR IMPERIAL VALLEY MOBILE PHONE IVM CUCAMONGA, CA IMPULSE COMMUNICATIONS INC IMQ SACRAMENTO, CA IN TOUCH COMMUNICATION SYSTEMS, INC. IUH IRVINE, CA IN TOUCH COMMUNICATIONS SERVICES, INC. INO OCEANSIDE, NY INCISCENT, INC. IIE FALLS CHURCH, VA INCLINE COMMUNICATIONS, INC. ICW TAMPA, FL INCOMNET COMMUNICATIONS (PREV EQUALNET CORP & NTZ NEWPORT BEACH, CA NATIONAL TELE CO) INDEPENDANT CELLULAR NETWORK IPD FORT MYERS, FL INDEPENDENCE TELEPHONE CO ITE INDEPENDENCE, OH INDEPENDENT CELLULAR NETWORK IDE FORT MEYERS, FL INDEPENDENT LONG DISTANCE ILD ALTAMONTE SPRINGS, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–98 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INDEPENDENT NETWORKS, L.L.C. IEN TERRIL, IA INDEPENDENT TELCOM ASSOC., INC. IPT LOUISVILLE, IL INDEPENDENT TELEPHONE CO INC IPH HARDINSBURG, KY INDIAN NATIONS FIBER OPTICS, INC. IFI OKLAHOMA CITY, OK INDIANA DIGITAL ACCESS IDA INDIANAPOLIS, IN INDIANA PAGING NETWORK INC IPN MICHIGAN CITY, IN INDIANA SWITCH INC IDN INDIANAPOLIS, IN INDIANA TELEPHONE CONNECT IAH FORT WAYNE, IN INDIANAPOLIS TELEPHONE COMPANY INC IND INDIANHEAD COMMUNICATIONS CORPORATION IUC HECTOR, MN INDIANTOWN TELEPHONE SYSTEM INC IDO INDIANTOWN, FL INDICOM IIC LAWRENCEBURG, IN INDUS, INC. INU MILWAUKEE, WI INDUSTRIAL & COMMERCIAL COMMUNICATIONS SERVICE ICS INDUSTRIAL COMMUNICATIONS ICM INDUSTRIAL COMMUNICATIONS OF PECOS,INC ICP PECOS, TX INDUSTRIAL ELECTRONICS AND AUTOMATION CO IEA INDUSTRIAL RADIO SALES INC IRD OKLAHOMA CITY, OK INDUSTRY HILLS VISITOR ACCOMOD IHV I-NET CORP INE DALLAS, TX INET INTERACTIVE NETWORK SYSTEM, INC. IVN LOS ANGELES, CA INFO PLUS OF BOSTON IPB NEEDHAM, MA INFOCOM INTERNATIONAL INC INF CHICAGO, IL INFOLINK COMMUNICATIONS, LTD IFK DALLAS, TX INFONET LONG DISTANCE, L.L.C. IFG KINGFISHER, OK INFONXX CARRIER NEW YORK, INC.(PREV INPHO ACCESS IAO EASTON, PA CORPORATION) INFORMARK INTERNATIONAL INC IIN DENVER, CO INFORMATION & TELEPHONE SERVICES IFS ORLANDO, FL INFORMATION AND COMMUNICATIONS SERVICES INC IFM MANKATO, MN INFORMATION TELCO SERVICES, INC. VOD NORTHBROOK, IL INFOSERVE TELECOM CORPORATION IFR HAUPPAUGE, NY INFOSPACE INC IFE BELLEVUE, WA INFOSPAN, INC. IFO CARROLLTON, TX INFO-TEL OPERATOR SERVICES INC IFT LITTLETON, CO INLAND CELLULAR TELEPHONE CO ICE ROSLYN, WA INLAND MOBILE COMMUNICATIONS INB ONTARIO, CA INLAND TELEPHONE CO INP UNIONTOWN, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–99 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INLAND VALLEY INTERNET & COMPUTERS IVI HEMET, CA INLEC COMMUNICATIONS, INC. ILZ PHILADELPHIA, PA INMATE CALLING SERVICES TBL ENGLEWOOD, CO INNOCOM TELECOM LLC IME OAKLAND, CA INNOSYS COMMUNICATIONS INC IYC LOS ANGELES, CA INNOTECH CORPORATION INN BLOOMINGTON, IL INNOTRAC, CORPORATION INY NORCROSS, GA INNOVATIVE COMMUNICATIONS INV INPHO ACCESS CORPORATION IAC NEW YORK, NY INSIGHT COMMUNICATIONS OF INDIANA, LLC IID NEW YORK, NY INSPIREN COMMUNICATIONS, INC. IPU MONUMENT, CO INSTANT COMMUNICATIONS IST INSTANT PAGE USA IPA SOUTHFIELD, MI INSTITUTIONAL COMMUNICATIONS CO ISC MC LEAN, VA INTEGRA FINANCIAL CORP IFL PITTSBURG, PA INTEGRA TELECOM OF MINNESOTA INC(PREV INFO-TEL IOC BEAVERTON, OR COMMUN. INC) INTEGRA TELECOM OF MINNESOTA, INC. IMM PRIOR LAKE, MN INTEGRA TELECOM OF OREGON, INC (PREV OGC OGT BEAVERTON, OR TELECOMM LTD) INTEGRAL SYSTEMS INC ISI SALT LAKE CITY, UT INTEGRATED COMMUNICATION SOLUTIONS, LLC IGU CANTON, OH INTEGRATED COMMUNICATIONS CONSULTANTS IGD MARINA DEL REY, CA CORPORATION INTEGRATED NETWORK SERVICES INC (INSINC) IGR VANCOUVER, BC INTEGRATED SYSTEMS CORPORATION IGA OKLAHOMA CITY, OK INTEGRATED TELECOMMUNICATIONS SYSTEMS, INC PHB FAIRFAX, VA (PREV TELESERV CORP) INTEGRATED TELEPHONE SERVICES CORPORATION IED WAYNE, NJ INTEGRATED TELESERVICES IVS FRESNO, CA INTEGRATION SERVICES INTERNATIONAL, INC. IVE FT. LAUDERDALE, FL INTEGRETEL INC IGT SAN JOSE, CA INTEL COMMUNICATIONS (PREV. CLOCKWORK CWO LONGVIEW, TX COMMUNICATIONS) INTELCO INL INTELCOM ITL INTELCOM, INC. OAU DUBLIN, OH INTELECOM SOLUTIONS, INC. IUS PLAINVIEW, NY INTELECORP CORPORATION ILE CHESTNUT HILL, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–100 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INTELELINK ITK BRAMPTON, ON INTELEPLEX CORP IPL INTELEX INX MADISON, WI INTELLA COMMUNICATIONS INC. ILU BAY SHORE, NY INTELLECARE.COM, INC. IAR DALLAS, TX INTELLIGENCE NETWORK ONLINE INC INH CLEARWATER, FL INTELLISTAR COMMUNICATIONS, INC. IXS HOUSTON, TX INTELLISWITCH INC IWI WEST PALM BEACH, FL INTELNET COMMISSION ILN INDIANAPOLIS, IN INTELNET.NET ILG WASHINGTON, DC INTER COMM MANAGEMENT NETWORK INK VAN NUYS, CA INTER CONTINENTAL TELEPHONE ICL SAN DIEGO, CA INTER CONTINENTAL TELEPHONE IRC SAN DIEGO, CA INTER DIVISION COMM IDV ARLINGTON, TX INTER TELECOMMUNICATIONS, INC. IEU EVANSTON, IL INTERACCESS CO. IRA CHICAGO, IL INTERACTIVE BILLING TECHNOLOGIES INC IBT LEAWOOD, KS INTERACTIVE MARKETING TECHNOLOGIES, INC. IMK CINCINNATI, OH INTERACTIVE NETWORK CONCEPTS INC. IKC TROOPER, PA INTERACTIVE NETWORK SYSTEMS, INC. IVW BLACKWOOD, NJ INTERACTIVE TELECOM NETWORK INC ITY AGOURA, CA INTERACTIVE VOICE DATA SYSTEMS INC IVD FLUSHING, NY INTERACTVE INFORMATION NETWORK, INC. IFW SYOSSET, NY INTERAMERICAN TELEPHONE CO IAT CORAL GABLES, FL INTERCALL, INC. ITB LYNDHURST, NJ INTERCALLINC ITC INTERCEL PCS SERVICES, INC. ICJ WEST POINT, GA INTERCHANGE SYSTEMS ITS INTERCITY CALLING CO ICO INTERCITY TELNET INC ICN SPOKANE, WA INTERCOM NETWORK, INC IOW MIAMI, FL INTERCOMMUNICATION AMERICAN SYSTEMS, INC. IAY NORTH MIAMI BEACH, FL INTERCONNECT SERVICES, L.L.C. IVG WAYNE, NJ INTERCONTINENTAL COMMS CELUR INC (PREV SAGINAW SGN FARMINGTON HLS, MI CELUR TEL) INTERCONTINENTAL COMMUNICATION CORP. IRM CHANTILLY, VA INTERCONTINENTAL COMMUNICATIONS GROUP, INC INQ DELRAY BEACH, FL DBA ICG INTER-CONTINENTAL SERVICES ICZ NEWPORT BEACH, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–101 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INTERCONTINENTAL TELECOM, INC.(PREV READYCALL, ESY ARLINGTON, TX INC) INTERGLOBAL TELEPHONE COMPANY DBA ITC IBO FT. LAUDERDALE, FL INTERGLOBE COMMUNICATIONS IGB STATEN ISLAND, NY INTERLINK ADVERTISING SERVICES, INC. DBA ISF DENVER, CO FORETHOUGHT.NET INTERLINK COMMUNICATIONS PARTNERS LLLP IKU PT. PLEASANT, WV INTERLINK PAGING IKP MELBOURNE, FL INTERLOOP, INC IPE HOLLYWOOD, FL INTERMEDIA COMMUNICATIONS INC (PREV EASTERN EMI SYRACUSE, NY MICROWAVE INC) INTERMEDIA COMMUNICATIONS (PREV INTERMEDIA ICF TAMPA, FL COMM. OF FLORIDA,INC) INTERMEDIA COMMUNICATIONS (PREV UNIVERSAL UNF ST. LOUIS, MO TELECOM INC) INTERMEDIA COMMUNICATIONS (PREV UNIVERSAL UVR HIGH RIDGE, MO TELECOM TECHNOLOGIES) INTERMEDIA COMMUNICATIONS INC ITD ST PETERSBURG, FL INTERMEDIA COMMUNICATIONS INC (PREV LONG LSI TAMPA, FL DISTANCE SAVERS INC) INTERMEDIA COMMUNICATIONS INC (PREV NATIONAL NFL LIGHTHOUSE POINT, FL TELECOMM FLORIDA) INTERMEDIA COMMUNICATIONS INC (PREV SOUTHWEST SNW AUSTIN, TX NETWORK SERVICES) INTERMEDIA COMMUNICATIONS INC. (PREV. PHONE EXF TAMPA, FL ONE) INTERMEDIA COMMUNICATIONS, INC(PREV DIGEX, DGX BELTSVILLE, MD INCORPORATED) INTER-MOUNTAIN CABLE, INC. IMA HAROLD, KY INTERMOUNTAIN COMMUNICATIONS IMI MOUNTAIN HOME, ID INTER-MOUNTAIN COMMUNICATIONS ITM SOUTH LAKE TAHOE, CA INTERMOUNTAIN MOBILEFONE IMF INTERMOUNTAIN WEST COMMUNICATIONS INC IWC BOISE, ID INTERNATIONAL BUSINESS CORES INC IBC PHOENIX, AZ INTERNATIONAL BUSINESS MACHINES IBM ARMONK, NY INTERNATIONAL CALL CENTER INC. IAE NEW YORK, NY INTERNATIONAL CALLING SERVICES, L.C. IRR LONGVIEW, TX INTERNATIONAL CELLULAR INC(PREV CENTRON CEO ATLANTA, GA TELECOMMUNICATIONS) INTERNATIONAL COMMERCE GROUP, LLC. IAA SANTA ROSA, CA INTERNATIONAL DESIGN GROUP, INC DBA USA TELECOM ISP DANIA, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–102 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INTERNATIONAL DISCOUNT TELECOMMUNICATIONS IDU HACKENSACK, NJ CORP INTERNATIONAL EXCHANGE COMMUNICATIONS, INC. IXH SANTA ANA, CA DBA IECOM INTERNATIONAL HARVESTER CO IHC INTERNATIONAL LONG DISTANCE CORPORATION IOD ATLANTA, GA INTERNATIONAL MARKETING & ADVERTISING INC. XYZ CORAL GABLES, FL INTERNATIONAL MESSAGE TELEPHONE SERVICE INC ILM OMAHA, NE INTERNATIONAL MOBILE TRACKING SYSTEM IMS AUSTIN, TX INTERNATIONAL OFFICE NETWORKS ION CORAL SPRINGS, FL INTERNATIONAL OPERATORS, INC. IOP DESOTO, TX INTERNATIONAL PAGING CORP IPG PASADENA, CA INTERNATIONAL RELAY ILR NEW YORK, NY INTERNATIONAL SATELLITE TELECOMMUNICATIONS INC ISU COCONUT GROVE, FL INTERNATIONAL SERVICES NETWORK, INC DBA ISN ISN MIAMI, FL COMMUNICATIONS INTERNATIONAL TALK.COM, INC. IAK AUSTIN, TX INTERNATIONAL TELCOM, LTD. INM SEATTLE, WA INTERNATIONAL TELECOM INC IAL ANCHORAGE, AK INTERNATIONAL TELECOMMUNICATION CORP. (PREV. ICQ SAN DIEGO, CA ITC CORPORATION) INTERNATIONAL TELECOMMUNICATION SERVICES, INC. ITF FORT LAUDERDALE, FL INTERNATIONAL TELECOMMUNICATIONS NETWORK INZ NEW BRAUNFELS, TX INTERNATIONAL TELECOMMUNICATIONS SYSTEMS INC INJ BOCA RATON, FL INTERNATIONAL TELEMEDIA ASSOCIATES,INC ITA ATLANTA, GA INTERNATIONAL TELEPHONE CO, INC. ILT NEW YORK, NY INTERNATIONAL TELEPHONE CORPORATION IER MISSION VIEJO, CA INTERNATIONAL TELEPHONE GROUP, INC IGP MORRISTOWN, NJ INTERNATIONAL TELE-SERVICES, INC. IAI NORCROSS, GA INTERNATIONAL TELESTAR, INC. ITJ SCOTCH PLAINS, NJ INTERNATIONAL TELNET, INC. IXT MIAMI, FL INTERNATIONAL TRADE RESOURCES GROUP LLC IAG COLUMBUS, OH INTERNATL TELEMEDIA ASSOC, INC (PREV INTERACTIVE WIC OMAHA, NE BILLING SERVICES INTERNET COMMUNICATIONS LLC IMO BAINBRIDGE, NY INTERNET COMMUNICATIONS SERVICES, INC. ICV ROCHESTER, NY INTERNET DATACOM IDC ENGLEWOOD, CO INTERNET DATACOMM INC IDM ENGLEWOOD, CO INTERNET ENGINEERING SYSTEMS INC IEZ SUNRISE, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–103 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INTERNET EXPRESS IRE SAN JOSE, CA INTERNET INC INR RESTON, VA INTERNET TELECOMMUNICATIONS SERVICES ITN BEAVERTON, OR INTERNET USA CORPORATION IUA WATERTOWN, NY INTERNETWORKS INC IWK ALOHA, OR INTERNEX INFORMATION SERVICES INC IIS MENLO PARK, CA INTERNEXT COMMUNICATIONS, INC. IRX SILVER SPRING, MD INTEROUTE, INC IRU BRICK, NJ INTERPAGE INC IRP MOUNTAINVIEW, CA INTER-PAGE INC. IPI WEST SENECA, NY INTERPATH COMMUNICATIONS, INC. IHA MORRISVILLE, NC INTERPHONE CO ITH COLUMBIA, MO INTERSTATE CAROLINA CORP ICC INTERSTATE COMMUNICATIONS INC ICI INTERSTATE ENTERPRISES, LTD IEP TRURO, IA INTERSTATE FIBERNET IFN WEST POINT, GA INTERSTATE NETWORK SYSTEMS INS WANTAGH, NY INTERSTATE OPERATORS, INC. IOI GLENN HEIGHTS, TX INTERSTATE SAVINGS INC ISV WILLOW GROVE, PA INTERSTATE TELECOM SERVICES INC ILC DUNCANVILLE, TX INTERSTATE TELEPHONE IET TWIN FALLS, ID INTERSTATE TELEPHONE COMPANY IEH LANETTE, AL INTERSTATE TELEPHONE INC INT INTERSTATE TELEPHONE INTERCONNECT INC ITI INTERSTATES MOBILEPHONE CO IMP INTERSVIAZ, INC. ISX NEWARK, DE INTERTEK INDUSTRIES IKI ALBANY, NY INTER-TEL ITR BELLINGHAM, WA INTER-TEL NETSOLTIONS IEE PHOENIX, AZ INTER-TEL.NET IJN RENO, NV INTERURBAIN GUEVREMONT LTEE IGV STE ROSALIE, PQ INTERURBAIN SOGETEL INC. IRB NICOLET, CN INTEX IEX ATLANTA, GA INTL TELECOMMUNICATIONS SYSTEMS INCORP ITO WASHINGTON, DC IN-TOUCH COMMUNICATIONS, INC. INI SAN ANTONIO, TX INTRA COMMUNITY COMMUNICATIONS, INC. ICY BALTIMORE, MD INTRADO INC IDI BOULDER, CO INTRAE IAB SAN FRANCISCO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–104 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location INTRALEC, INC. IEB ATLANTA, GA INTRANET COMMUNICATION INC IRN SEATTLE, WA INTRASTATE RADIO TELEPHONE INC IRT INTRASTATE RADIO TELEPHONE INC - LOS ANGELES IRL INTRASTATE RADIO TELEPHONE INC - SAN FRANCISCO IRF INTREX TELECOMMUNICATIONS CORP (PREV OK OKP EDMOND, OK PHONELINES CORP) INTTEC, INC. IEI GILLETTE, WY INVALID DO NOT USE AVN NASHVILLE, TN INVALID DO NOT USE NRG MADISON, WI INVALID DO NOT USE QTT CINCINNATI, OH INVALID DO NOT USE TOW REYNOLDSBURG, OH INVENTIVE TECHNOLOGY, LTD IVH ELK CITY, OK INVISION TELECOM INC. IVT BEDFORD, MA IONEX TELECOMMUNICATIONS INC IOX DALLAS, TX IONOSPHERE INC IOS GREENVILLE, SC IOWA COMMUNICATIONS NETWORK (PREV. STATE OF SOI DES MOINES, IA IOWA) IOWA NETWORK SERVICES INC IAS WEST DES MOINES, IA IOWA RADIO SERVICE INC IRS IOWA RSA 2 LIMITED PARTNERSHIP IAP EMERSON, IA IOWA TELECOM COMMUNICATIONS, INC. IAU NEWTON, IA IOWA TELECOMMUNICATIONS SERVICES, INC. IWA NEWTON, IA IOWA WIRELESS SERVICES, LP IWS DES MOINES, IA IP COMMUNICATIONS CORPORATION IPO DALLAS, TX IPS TELECOM, INC. IPZ ENGLEWOOD, CO IPX INC IPY JERSEY CITY, NJ IQ TELECOM, INC. IQT BLUE ISLAND, IL IQC, LLC. IQC WAXAHACHIE, TX IRIDIUM NORTH AMERICA IMN TEMPE, AZ IRONTON LONG DISTANCE CO IRO COPLAY, PA IRONTON TEL CO IOO COPLAY, PA IRONWOOD CALL AMERICA ICA IRONWOOD, MI IRT GENCOM IRG LOS ANGELES, CA IRVING H. PARKER DBA BEEPERS & MORE IHP BELLFLOWER, CA ISC OF MIAMI, INCORPORATED ISM MIAMI, FL ISLAND DIRECT CALLS ISD ARLINGTON, TX ISLAND PAGE ILA HONULULU, HI ISLAND TELEPAGE SYSTEMS ITP

Proprietary — Licensed Material See proprietary restrictions on title page. 8–105 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ISLANET INC ISQ SAN JUAN, PR ISP TELECOM INC. ISW MONTREAL, PQ ISS ENGINEERING INC ISE PALO ALTO, CA IT DOESN’T MATTER (PREV. GREGORIAN CALLS) GRG KENNEDALE, TX IT&E OVERSEAS, INC IEO TAMUNING, GU ITC INC ICD ERIE, PA ITC INC ITZ SALT LAKE CITY, UT ITC TRANSMISSION INC ISY WEST POINT, GA ITI INCORPORATED ITX PAOLI, PA ITN CORP (DBA NORTHQUEST TELECOM, INC.) ITQ TORONTO, ON ITT - USTS ITU ITTEL CARRIER, INC. IRI WHITESTONE, NY ITXC CORP IXO PRINCETON, NJ IVIT COMMUNICATIONS GROUP, INC. IVC KILGORE, TX IWL COMMUNICATIONS INC IWL FRIENDSWOOD, TX IXNET (SUB OF GLOBAL CROSSING, LTD) IPX NEW YORK, NY J & D TRUNKING JDT GREENVILLE, MS J & J SYSTEMS INC JJS ABILENE, TX J & K COMMUNICATIONS INC JKM VICTORIA, TX J & K COMMUNICATIONS, INC. JKN COLUMBIA CITY, IN J & R ELECTRONICS JRE IRON MOUNTAIN, MI J B OPERATORS, INC. JBO ABILENE, TX J C PENNEY CO INC JCP NEW YORK, NY J F LOCKETT ASSOCIATES JLA STAMFORD, TX J G EASLEY CO JGE TULSA, OK J I L COMMUNICATIONS INC JIL CAMDEN, NJ J NET COMMUNICATIONS JNE FORT SMITH, AR J&W COMMUNICATIONS JWC JACKSON COUNTY BROADCASTING SVC INC JCB JACKSON MOBILPHONE COMPANY INC JMP JACQUE NICHOLS JQN VANCOUVER, WA JAGUAR COMMUNICATIONS, INC. JAG OWATONNA, MN JAMES B HARRINGTON JBH ALBUQUERQUE, NM JAMES C. CHANDLER DBA PEOPLES TELEPHONE JCC ERIN, TN COMPANY JAMES C. CRENSHAW COMMUNICATIONS, INC. JCZ DENISON, TX JAMES CASS TELEPHONE INDUSTRY CONSULTANT JCT VICTORIA, TX JAMESTOWN PAGING & MOBILE TEL JPM

Proprietary — Licensed Material See proprietary restrictions on title page. 8–106 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location JANIO TELECOM SERVICES INC. JAN JAMAICA, NY JAPAN TELECOM AMERICA, INC JTM NEW YORK, NY JAR ELECTRONICS INC JEI HOUSTON, TX JARVIS COMMUNICATIONS SERVICES OF VA INC JCS JARVIS COMMUNICATONS OF SOUTH CAROLINA JVS CHARLESTON, SC JAS NETWORKS, INC. JSN BATTLE CREEK, MI JATO COMMUNICATIONS JAT ENGLEWOOD, CO JC PENNEY BUSINESS SERVICES JPB DALLAS, TX JC&N SATELLITE TELECOMMUNICATIONS (PREV AMH SAN DIEGO, CA AMERICAN TELE HOLDING LTD JCA, INC DBA PHONESENSE JCA HOUSTON, TX JD SERVICES, INC. JDS SLC, UT JEBCOM INC JBC CAMBRIDGE, OH JEFFERSON STATE COMMUNICATIONS JSC MEDFORD, OR JENNINGS MOBILFONE JNG JERRY’S MOBILE RADIO REPAIR JMR SHASTA, CA JESSE R. WHEELER DBA EXPRESS CHECK CASHING JRW JACKSON, TN JETCOM, INC. JET DAVIE, FL JILAPUHN, INC. DBA VI-TELCO JVT COLLEGE PARK, GA JIM BOB MEASURES RADIOFONE-MOBILFONE JBM JIM WILHITE DBA MOBILCOM OF HEREFORD JWM JIM WYNN INC JWY WILBURTON, OK JK COMMUNICATIONS JKC JLC SERVICES INC DBA MEGA PAGE JLC BAYAMON, PR JMP TECH JMT MOUNTAIN VIEW, CA JMS JMS SYLVANIA, OH JOHNSON TELEPHONES JHN JOHNSTON COMMUNICATIONS JST SNYDER, OK JOINES TEL ANS & RADIO COMMUNICATIONS JTA JOLIET CELLULAR TELEPHONE CO JCR PLEASANTVILLE, NJ JOLIET TELEPHONE ANSWERING SERVICE JAS JOLIET, IL JONES LIGHTWAVE LTD JLW ENGLEWOOD, CO JOPLIN BEEPERS JBS PURDY, MO JOPLIN MOBILFONE JMF JOPLIN MOBILFONE SERVICE INC JPL JOPLIN, MO JOSEPH THAL AND COMPANY JTC NEW YORK, NY JSL/TOLL MANAGEMENT SYSTEMS INC JSL JSM NET LINK, LLC JSK SHEBOYGAN FALS, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–107 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location JSM TELE-PAGE INC. JSM SHEBOYAN FALLS, WI JTC COMMUNICATIONS, INC. JCU LOUISVILLE, KY JUBILEE TELECOM, L.L.C. JUB UPPER SADDLE RIVER, NJ JUICE NETWORKS INC JUN SAN DIEGO, CA JUNCTION COMMUNICATIONS, INC. JNC WILTON, IA JUSTICE LONG DISTANCE CORP. JLD EL SEGUNDO, CA JUSTICE TECHNOLOGY CORP. JUS CULVER CITY, CA JWT PARTNERSHIP II JWT SEATTLE, WA K & K COMMUNICATIONS KKU RAWLINS, WY K & S INTERNATIONAL COMMUNICATIONS, INC. KSI MIAMI, FL K P CONSULTING KPC K.T.W. INTERNATIONAL CORPORATION KTW UNION, NJ KAC COMMUNICATIONS COMPANY KAC EAST ORANGE, NJ KALAMA TELEPHONE CO KAL KALAMA, WA KAL-COM INC KLC KALKASKA, MI KALEVA TELEPHONE COMPANY KVT KALEVA, MI KANAS TELECOM INC KNL ANCHORAGE, AK KANCHARLA CORPORATION KAH HUNTSVILLE, AL KANKAKEE CELLULAR TELEPHONE CO KKC SCHAUMBURG, IL KANKAKEE TELEPHONE ANSWERING SERV INC KAS KANKAKEE, IL KANNING, LARRY DBA A BEEP AWAY BWY MOUNTAIN HOME, NC KANOKLA COMMUNICATIONS, INC. DBA KANOKLA L.D. KNO ANTHONY, KS KANSAS 4 CELLULAR LIMITED PARTNERSHIP(NOW KSF ROSWELL, GA WESTERN WIRELESS - PCF) KANSAS 9 CELLULAR LIMITED PARTNERSHIP(NOW KSC ROSWELL, GA WESTERN WIRELESS - PCF) KANSAS CITY FIBERNET KCF KANSAS CITY, MO KANSAS INDEPENDENT NETWORKS INC KIN SALINA, KS KANSAS PERSONAL COMMUNICATION SERVICE, LTD. KPO COUNCIL GROVE, KS KAPLAN TELEPHONE COMPANY KAP KAPLAN, LA KAR KALL KKL KASSON & MANTORVILLE TELEPHONE COMPANY KMN KASSON, MN KAWAHAWI CO KWH AUSTIN, TX KAYLA COMMUNICATIONS, INC. KAY CHICAGO, IL KBTN KBT IRVING, TX KCC COMMUNICATIONS KCC NEW YORK, NY KCC TELCOM, INC. DBA K2C TELCOM KCL KERVILLE, TX KCI LONG DISTANCE INC. (SUB OF KELHOURN KCI SYRACUSE, MY COMMUNICATIONS INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–108 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location KCINDUR COMMUNICATIONS INC DBA ADVANCED KRC SANTA MARIA, CA PAGING KCL, INC. (DBA GENERAL TELECOM) GRM NEW YORK, NY KCOMMUNICATIONS KCS KDD AMERICA, INC(PREV NET EXPRESS NXC NEW YORK, NY COMMUNICATIONS INC) KEANE COMMUNICATIONS KNM SIOUX CITY, IA KEARBY’S RADIO SHOP KBR WALNUT RIDGE, AR KELLEY COMMUNICATION KCU KELLEY’S RADIO TELEPHONE KRT KELLEY’S TELE-COMMUNICATIONS INC KLP PASCO, WA KEN NETWORK INC KNT SALINA, KS KENNEDALE TELCOM KND KENNEDALE, TX KENTEC COMMUNICATIONS INC KEN STERLING, CO KEN-TEL SERVICE INC KTS ADRIAN, MI KENTUCKY DATA LINK, INC. KDL EVANSVILLE, IN KENTUCKY RADIO SERVICE KRS KENTUCKY TELEPHONE CORP KTC LOUISVILLE, KY KERN COMMUNICATIONS INC (PREV COMMUNICATIONS CEI BAKERSFIELD, CA ENTERPRISES, INC) KERN COUNTY TELECOM LTD KCT BAKERSFIELD, CA KERO COMMUNICATIONS KRO ARLINGTON, TX KERRVILLE L D PHONE SERVICE KLD KERRVILLE, TX KERTEL COMMUNICATIONS, INC. KER KERMAN, CA KEXA CORP DBA CAPITAL EXPLORATION EOO DELRAY BEACH, FL KEY COMMUNICATIONS LLC KEC FT MYERS, FL KEY SERVICE CORP KYS ALBANY, NY KEY SYSTEMS CORP KSY ALBANY, NY KEYART COMM., INC. KAT KEYSTONE, NE KEY-COMM INTERNATIONAL, INC. KCR HOUSTON, TX KEYSTONE ARTHUR TELEPHONE CO KYA KEYSTONE, NE KEYSTONE FARMERS COOPERATIVE TELEPHONE KFC KEYSTONE, IA COMPANY KEYSTONE KALLING, INC. KYK PHILADELPHIA, PA KEYSTONE LONG DISTANCE KYL RESTON, VA KEYSTONE NETWORK SERVICE KYN DALLAS, TX KEYSTONE REHABILITATION SYSTEMS KRN INDIANA, PA KEYSTONE RESORT KEY KEYSTONE TELECOM INC KST SCRANTON, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–109 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location KEYSTONE TELECOMMUNICATIONS INC KSN KHN COMMUNICATIONS KHN KIDD’S COMMUNICATIONS INC KDC KIN NETWORK INC KNN SALINA, KS KING COMMUNICATIONS KCM KING COMMUNICATIONS INC KNG SAGINAW, MI KING SALMON COMMUNICATIONS, INC KSO KING SALMON, AK KINGDOM TELEPHONE COMPANY KGT AUXVASSE, MO KING’S DEER TELEPHONE COMPANY KDT COLORADO SPRINGS, CO KINGS MESSAGE PLEX KMP COLUMBUS, OH KINGS TELEPHONE CO KNS ATLANTA, GA KINGTEL, INC. KEL FT. LAUDERDALE, FL KIRBY COMMUNICATIONS INTERNATIONAL INC KBY HOUSTON, TX KISS’N TEL COMMUNICATIONS, INC. KTM BALTIMORE, MD KITCHEN PRODUCTIONS, INC. DBA TORTOISE KTP RIDGECREST, CA COMMUNICATIONS & PAGING KITNET, LLC. KIT SALINA, KS KIVA TELECOMMUNICATIONS, INC KVA BLOOMINGTON, IN KLM LONG DISTANCE COMPANY KLM MAITLAND, MO KMAR COMMUNICATIONS, INC. KMR CHESTER, NH KMC SOUTHEAST CORP. KMC HUNTSVILLE, AL KMC TELECOM INC (PREV. KAMINE) SUB OF KMC KMM DULUTH, GA TELECOM HOLDINGS INC KNET.COM, INC. DBA KNET KNE PRAIRIE VILLAGE, KS KNIGHT COMMUNICATIONS, INC. KHT PHOENIX, AZ KNOBVIEW TELEPHONE CO KNB ST JAMES, MO KNOLOGY HOLDINGS, INC (PREV CYBERNET HOLDING, CJY WEST POINT, GA INC.) KNOX SERVICE GROUP KSG DENTON, TX KO COMMUNICATIONS KOC YORKTOWN, IN KODIAK WIRELESS KDW PALMER, AK KOKOMO CELLTELCO KKM KANSAS CITY, MO KOREA TELECOM, INC KOT ROSEDALE, NY KOREA TELECOMM KOR SEOUL, KO KOTANA COMMUNICATIONS KNC KOYOTE TELEPHONE INC KTT COMMERCE, TX K-PAGE/ADVANCED VOICE PAGERS A BETTER BEEPER KPG WINFIELD, KS KPMG CONSULTING, LLC. KCO LIBERTY CORNER, NJ KPN INS INC KPN MANHATTAN, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–110 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location K-POWERNET LLC KPW VINITA, OK KRAFT COMMUNICATIONS KRF WYLE, TX KRB TELECOM KRB BRANDON, SD K-TEL COMUNICATIONS KTL WICHITA FALLS, TX KTNT COMMUNICATIONS KTN KENNEDALE, TX KVET BROADCASTING DBA CONSTANT KBC COMMUNICATIONS KYCOM KYC PORTOLA VALLEY, CA KYTEL INTERNATIONAL GROUP INC (PREV KYTEL COMM. KYT NEW YORK, NY GROUP INC) L A AIR SIGNAL CO LAA LOS ANGELES, CA L C COMMUNICATIONS LCX MIAMI, FL L D C TELECOMMUNICATIONS LTM HIALEAH, FL L D NETWORK INC LDQ YORBAS LINDA, CA L I TEL CO COMMUNICATIONS INC LIT L M COMMUNICATIONS INC LMC WILMER, MN L&L SERVICE INC LLS L.R. COMMUNICATIONS, INC. LRC LEAF RIVER, IL LA MOVIDA BEEPERS COMMUNICATION LMB LOS ANGELES, CA LA REPUBLICA COMMUNICATIONS, INC. LPC NORTH BRUNSWICK, NJ LA WARD CELLULAR LWD LA WARD, TX LACKAWAXEN LONG DISTANCE COMPANY LWX ROWLAND, PA LACKAWAXEN TELEPHONE COMPANY LCK ROWLAND, PA LAFAYETTE CITY - PARISH CONSOLIDATED GOVERNMENT LHG LAFAYETTE, LA LAFAYETTE OF GLENDIVE LFG LAFAYETTE OF MILES CITY LFM LAFAYETTE RADIO TELEPHINE CO LFY WEST LAFAYETTE, IN LAGORIO COMMUNICATIONS LAG MONTECO, CA LAKE AREA PAGING INC LAP LAKE HURON CELLULAR CORP LHR CARO, MI LAKE MOBILE PHONE INC LKM OSAGE, MO LAKE STATES COMMUNICATIONS LKS MADISON, WI LAKEDALE LINK, INC. LKD ANNANDALE, MN LAKEFIELD COMMUNICATIONS, INC. LKF NEWTON, WI LAKELAND TELECOM, INC. LLT LUCK, WI LAKER TELECOMMUNICATIONS CORPORATION LKR ANDOVER, NJ LAMAR COMMUNICATIONS SYSTEMS INC LMR LAMAR, MO LAMAR COUNTY CELLULAR INC LMU PARIS, TX LAMBDA COMMUNICATIONS, INC LAM SAN JUAN, PR

Proprietary — Licensed Material See proprietary restrictions on title page. 8–111 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LANCASTER ALARM CO INC LCA LANCASTER RADIO PAGING CORP LCR LANDLINE CORP LND HOFFMAN ESTATES, IL LANDMARK COMMUNICATIONS CO INC LMK LAWRENCE, KS LANDMARK COMMUNICATIONS INC LAI SANTA ANA, CA LANDMARK INN HOTEL-BEST WESTERN LAN LANG PAGING INC LPG LANGLEY TELECOMMUNICATIONS LGL DALLAS, TX LANSER TELECOM INC. LTI WESTMOUNT, PQ LARKIN PUBLICATIONS LPS CHESTNUT HL, MA LAR-LIN ENTERPRISES DBA VOICE-TEL LAR LENEXA, KS LAR-TEX CELLULAR TELEPHONE CO LTX LAREDO, TX LASER COMMUNICATION LSM HEMET, CA LATAMNAP. INC. LPI HOMESTEAD, FL LATATEL DE AMERICA, INC (PREV. CALL US INC) CKX NEW YORK, NY LAUREL HIGHLAND LONG DISTANCE COMPANY LHL STAHLSTOWN, PA LAUREL HIGHLAND TELEPHONE COMPANY LHD STAHLSTOWN, PA LAURENS MUNICIPAL COMMUNICATIONS UTILITY LEM DAKOTA DUNES, SD LAVACA TELEPHONE CO. LVA LAVACA, AR LAVALLE LONG DISTANCE, INC. LLC LAVALLE, WI LAVERENE’S TELEPHONE ANSWERING SERVICE LTA LAWRENCE CARPHONE LCP LAWRENCE MOBILPHONE LWR LAWRENCE, KS LAWTON COMMUNICATIONS LTC LAYER 4 TECHNOLOGIES INC LYF JERSEY CITY, NJ LAYERONE INC LYO DALLAS, TX LAYNE COMMUNICATIONS INC LCS NEW YORK, NY LBC TELEPHONY INC LBT PARSIPPANY, NJ LCC (PREV CAMBRIDGE COMMUNICATIONS GROUP INC) CBG LUFKIN, JE LCC (PREV HUNTSVILLE LONG DISTANCE CO) HLD LUFKIN, TX LCC (PREV LUFKIN-CONROE TELECOMMUNICATIONS LKC LUFKIN, TX CORP) LCC (PREV NACODOCHES TELECOMMUNICATIONS INC) NCS LUFKIN, TX LCC (PREV TYLER TELECOM) TYL LUFKIN, TX LCI LCZ BRANDON, SD LCI INTERNATIONAL (PREV ATS NETWORK ATS MEMPHIS, TN COMMUNICATIONS) LCI INTERNATIONAL (PREV CHARTER CORP) JJJ LOUISVILLE, KY LCI INTERNATIONAL (PREV CHARTER NETWORK) CWK SAVANNAH, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–112 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LCI INTERNATIONAL (PREV CHARTER NETWORK) VNS DUBLIN, OH LCI INTERNATIONAL (PREV CORPORATE CGP GREENVILLE, SC TELEMANAGEMENT GROUP) LCI INTERNATIONAL (PREV HOGAN COMMUNICATIONS) HOG BELLEVUE, WA LCI INTERNATIONAL (PREV LITEL/LCI INTERNATIONAL) LTL WORTHINGTON, OH LCI INTERNATIONAL (PREV PHOENIX NETWORK CORP) PHX LCI INTERNATIONAL (PREV T M SEPULVEDA INC) SEP LOS ANGELES, CA LCI INTERNATIONAL (PREV TELAMARKETING TLX LEXINGTON, KY COMMUNICATIONS OF LEXINGTON LCI INTERNATIONAL (PREV TELEDIAL AMERICA) TED MICHIGAN, MI LCI INTERNATIONAL (SUB OF QWEST COMMUNICATIONS LGT WORTHINGTON, OH INTERNATL. INC) LCI INTERNATIONAL TELECOM CORP(PREV PACE LONG PAC GREENSBURG, PA DISTANCE SERVICE) LD BRUCE LBU MILWOUKEE, WI LD TELECOMMUNICATIONS, INC. LDJ MIAMI, FL LDB OF ROCHESTER LBR ROCHESTER, MN LDC TELECOMMUNICATIONS INC. LCU TAMPA, FL LDCC INC. LDY SPRINGFIELD, MO LDDS MUR SULPHUR, LA LDI SOLUTIONS, INC. LIS SAN FRANCISCO, CA LDM SYSTEMS, INC. LMS NEW CITY, NY LDS ALEXANDRIA LDA ALEXANDRIA, LA LDS MONROE LMN MONROE, LA LDS OF BATON ROUGE LDR MONROE, LA LDS OF SHREVEPORT LSH SHREVEPORT, LA LDS OF TULSA LTU TULSA, OK LDX INC(NOW LEXITEL) LDI LDX TELECOM INC LDX LE CARD, LTD. D/B/A INTERNATIONAL AUDIOTEXT LEC EATONTOWN, NJ SERVICES LEACO RURAL TELEPHONE COOPERATIVE INC LCO LOVINGTON, NM LEADING EDGE ENTERPRISES, INC. LGE ATLANTA, GA LEAST COST ROUTING DBA LONG DISTANCE CHARGES LCG SANTA ANA, CA LEAST COST ROUTING, INC. LRG CLEARWATER, FL LEBANON COUNTY CELLULAR INC LNC LANDOVER, MD LEBANON MOBILE PHONE INC LMP LEBANON MOBILEFONE INC LMF LEC LONG DISTANCE, INC. LLD BALLWIN, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 8–113 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LEC-LINK LLK ANTIOCH, TN LECSTAR TELECOM, INC (PREV EMPIRE TELECOM EIR ATLANTA, GA SERVICES, INC) LECTRONICS INC LCT LEE ELECTRONICS LEE HERCULES, CA LEE HARBOR HOMES LEH LEHIGH ACRES, FL LEEMAH ELECTRONICS LMH SAN FRANCISCO LEE’S COMMUNICATIONS, LLC LEU INDIANAPOLIS, IN LEGACY LONG DISTANCE INTERNATIONAL, INC. LGI LONG BEACH, CA LEGAL AID SOCIETY OF ORANGE COUNTY LAS SANA ANA, CA LEGENDS COMMUNICATIONS, INC LED ATLANTA, GA LEGENT COMMUNICATIONS CORPORATION LGX IRVINE, CA LEHIGH VALLEY MOBILE TELE CO LVM LEHIGH VALLEY PAGE LVP ALLENTOWN, PA LEHIGH VALLEY TELECOM INC LVT LENFEST TELEPHONY, INC. LFT OAKS, PA LENNON TELEPHONE CO. LPH LENNON, MI LENOX HILL HOSPITAL LHH NEW YORK, NY LEON’S RADIO INC LRD OKLAHOMA CITY, OK LERMER OVERSEAS TELECOMMUNICATIONS INC LOR BRONX, NY LE-RU LONG DISTANCE COMPANY LRN STELLA, MO LE-RU TELEPHONE COMPANY LRU STELLA, MO LESIE HAMMOND-PHONE AMERICA LPA GUYMAN, OK LESTER D PLOUGH DBA PLOUGH’S RADIO SERVICE LDP LETT ELECTRONICS LES LEVEL 3 COMMUNICATIONS, LLC LVC LISLE, IL LEVY ASSOCIATES INC. LEV BROOKLYN, NY LEWIS COMMUNICATIONS LWS WYLE, TX LEXCOM LONG DISTANCE, INC. LTD LEXINGTON, NC LEXCOM TELEPHONE COMPANY LXO LEXINGTON, NC LEXITEL CORP LEX LGM COMMUNICATIONS, INC. LMO BRIDGEPORT, CT LHM INC LHM FALLS CHRUCH, VA LIBERTY BELL COMMUNICATIONS INC LBC LIBERTY BELL TELEPHONE CO INC LTY SEATTLE, WA LIBERTY CELLULAR, INC DBA KANSAS CELLULAR KSL SALINA, KS LIBERTY COMMUNICATIONS LIB LIBERTY PAGING SERVICE LBP HELENA, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–114 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LIBERTY TELECOM LLC LRY RENO, NV LIBERTY TELEPHONE CORP LBY MESA, AZ LIBOTEL INC. LIO ST LIBOIRE, QC LIGHT LINK, INC DBA TEX-LINK COMMUNICATIONS, INC. LGK SAN ANTONIO, TX (PREV LIGHT SPEED OPERATORS LSO KENNEDALE, TX LIGHTBONDING.COM INC. LIH CHANTILLY, VA LIGHTBONDING.COM VA INC. LGV CHANTILLY, VA LIGHTCOM INTERNATIONAL LIL WASHINGTON, DC LIGHTEL INC LGH WILLOWDALE, ON LIGHTHOUSE COMMUNICATIONS INC LCM LIGHTNET INC (NOW WILTEL - WTL) LNT NEW HAVEN, CT LIGHTRADE LTH WASHINGTON, DC LIGHTSHIP TELECOM, L.L.C. LTP NASHUA, NH LIGHTSOURCE TELECOM I, LLC LGU TOLEDO, OH LIGHTSPEED FIBER NETWORK, LLC LFN BRIARCLIFF MANOR, NY LIGHTSPEED TELECOM, LLC LID SALEM, IL LIGHTWAVE COMMUNICATIONS, LLC LWV LAUREL, MD LIGHTYEAR COMMUNICATIONS, INC. (PREV UNIDIAL UID LOUISVILLE, KY COMMUNICATIONS, INC) LIGTEL COMMUNICATIONS, INC LIG LIGONIER, IN LIN COMMUNICATIONS INC LIN LIN GUARD BAND INC LGB LINCOLNVILLE COMMUNICATIONS, INC. LNV LINCOLNVILLE, ME LINCOM CORP LCC DALLAS, TX LINE SYSTEMS, INC. LYA BROOMAL, PA LINEAR COMMUNICATIONS CORPORATION LER CORONADO, CA LINEDRIVE COMMUNICATIONS LRM MORRISVILLE, NC LINEONE LON TAMPA, FL LINK TECH CORPORATION LKH SANTURCE, PR LINK TWO CORPORATION LOO HOUSTON, TX LINKATEL OF CALIFORNIA, L.P. LKT SAN DIEGO, CA LINKATEL PACIFIC LKP SANTA ANA, CA LINKNET LKN JACKSON, MS LINKUSA LNK CEDER RAPIDS, IA LINQ UP AMERICA LUA NORTHRIDGE, CA LIONHART OF MIAMI INC DBA ASTRAL COMMUNICATIONS LML MIAMI, FL LIP CORP LIP LAKEWOOD, NJ LISCO INDUSTRIES INC (VA KY COMMUNICATIONS) LIV NORTON, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–115 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LISTING SERVICES SOLUTIONS, INCORPORATED LSU LUMBERTON, NJ LITCALL LHC WORTHINGTON, OH LITCHFIELD COUNTY CELLULAR, INC. LCY LEXINGTON, KY LITCO TELECOMMUNICATIONS COMPANY LTV NEW YORK, NY LITELCO COMMUNICATIONS INC LEL OCEANSIDE, NY LIVE OAK TELECOM LVO CEDAR PARK, TX LIVE WIRE NETWORKS, INC. LWN DENVER, CO LJSS GENERAL CORPORATION LJS CHICAGO, IL LMG TELEPHONE, INC. LMG SANTA BARBARA, CA LO CALL USA LCL LOADPOINT LLC LPT BRENTWOOD, TN LOCAL ACCESS NETWORK, LLC LAE RICE, MN LOCAL ACCESS PRIME,LLC LPM CENTRALIA, WA LOCAL COMMUNICATIONS NETWORK, INC. LOW STERLING, VA LOCAL EXCHANGE CARRIERS OF MICHIGAN INC LEF GRAND RAPIDS, MI LOCAL FIBER L.L.C. LFR LONG ISLAND CITY, NY LOCAL FONE SERVICE, INC. LFS ARLINGTON, TX LOCAL GATEWAY EXCHANGE, INC LGW DALLAS, TX LOCAL LINE AMERICA, INC. LLA CUYAHOGA FALLS, OH LOCAL LONG DISTANCE, L.C. , DBA LOCAL ALLIANCE LAW RINGSTED, IA NETWORK LOCAL PHONE SERVICES, INC. LPV WICHITA, KS LOCAL TELCOM HOLDINS, LLC. DBA TRANSPOINT LHS CALABASAS, CA COMMUNICATIONS LOCAL TELECOM SERVICE, LLC LLV FT WORTH, TX LOCAL TELEPHONE DATA SERVICES CORP LAL FAIRFIELD, IA LOCAL TELEPHONE SERVICE COMPANY LTR HOUSTON, TX LOCAL TELEPHONE SERVICES, CO. (KS) LEP JUNCTION CITY, KS LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTA INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTB INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTC INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTD INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTE INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTF INVALID IAC CODE

Proprietary — Licensed Material See proprietary restrictions on title page. 8–116 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTG INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTH INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTI INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTJ INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTK INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTL INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTM INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTN INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTO INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTP INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTQ INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTR INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTS INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTT INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTU INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTV INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTW INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTX INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTY INVALID IAC CODE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - ZTZ INVALID IAC CODE LOCUS LOC FORT LEE, NJ LOG ON AMERICA, INC. LGO PROVIDENCE, RI LOGIX COMMUNICATIONS CORP. (PREV AMERICAN TELCO ANN HOUSTON, TX NETWORK SERVICES)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–117 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LOGIX COMMUNICATIONS CORPORATION (PREV AMN OKLAHOMA CITY, OK AMERICAN TELCO INCORP.) LOGIX COMMUNICATIONS CORPORATION (PREV DOBSON DOB OKLAHOMA CITY, OK WIRELESS, INC) LOGOS COMMUNICATIONS, INC. LMM WESTLAKE, OH LOMA INTERNATIONAL COMMUNICATIONS INC LOM CAGUAS, PR LONDON TELECOM NETWORK INC LTN OAKVILLE, ON LONE STAR CELLULAR INC LSZ PLEASANTON, CA LONE STAR TELECOM LST SAN ANTONIO, TX LONG BRANCH CELLULAR TELEPHONE CO LBH LONG BRANCH, NJ LONG DISTANCE AMERICA DUS FT LAUDERDALE, FL LONG DISTANCE AMERICA HEMET LDH NEWPORT BEACH, CA LONG DISTANCE ASSISTANCE LGN PLANO, TX LONG DISTANCE BILLING CO LBL LAS VEGAS, NV LONG DISTANCE BROKERS OF AMERICA LBA LONG DISTANCE CHARGES, INC. LGC SANTA ANA, CA LONG DISTANCE DIRECT INC. LGR PEARL RIVER, NY LONG DISTANCE DISCOUNT INC LGD CAPE GIRARDE, MO LONG DISTANCE EXCHANGE LDE LONG DISTANCE INTERNATIONAL INC. LGF FORT LAUDERDALE, FL LONG DISTANCE MANAGEMENT LDM PADUCAH, KY LONG DISTANCE MANAGEMENT LGM OKLAHOMA CITY, OK LONG DISTANCE NETWORK LDN LONG DISTANCE NORTH OF NORTH HAMPSHIRE LNH MANCHESTER, NH LONG DISTANCE OF MICHIGAN DBA FONETEL FEL HAMTRAMCK, MI LONG DISTANCE OF MICHIGAN INC DBA LDMI LMI HAMTRAMCK, MI TELECOMMUNICATIONS LONG DISTANCE OHIO LOH PORTSMOUNTH, OH LONG DISTANCE OPERATOR CO LPR LUBBOCK, TX LONG DISTANCE OPERATORS INC LDO SPRINGFIELD, MO LONG DISTANCE SATELLITE LSL FRAZIER, PA LONG DISTANCE SEARCY LSR SEARCY, AR LONG DISTANCE SERVICE LNG LONG DISTANCE SERVICE OF WASHINGTON LDW WASHINGTON, DC LONG DISTANCE TELEPHONE COMPANY LDT LONG DISTANCE TELEPHONE CORP LDZ LEWISTON, ME LONG DISTANCE TELEPHONE SAVERS INC LTS LONG DISTANCE WHOLESALE CLUB (EXCEL LWH WASHINGTON, DC COMMUNICATIONS)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–118 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LONG ISLAND LONG DISTANCE LLL RONKONKOMA, NY LONG ISLAND TELEPHONE COMPANY LSD UNIONDALE, NY LONG LINE INC LLI SIOUX FALLS, SD LONG LINE SERVICES INC LLN BAKERSFIELD, CA LONG-DISTANCE CO (THE) LCE DETROIT, MI LONGNET LNN LOOKING GLASS NETWORKS, INC. LGG ADDISON, TX LORAIN ELECTRONICS CORP LRE DALLAS, TX LORAINE TELECOM CORP LRT DALLAS, TX LORAL ORION, INC. LOI ROCKVILLE, MD LOS ANGELES CELLULAR TEL CO LAC CITYOF COMMERCE, CA LOS BANOS TELECOMMUNICATIONS LFB FRESNO, CA LOST NATION - ELWOOD TELEPHONE COMPANY LNE LOST NATION, IA LO-TEL COMLER LOT LOTELCO, INC. LOL EDMOND, OK LOUISA COMMUNICATIONS, L.C. LAO MORNING SUN, IA LOUISIANA 8 CORPORATION LOU NEW YORK, NY LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. LUM KAPLAN, LA LOUISIANA UNWIRED, INC. LAU CHARLES, LA LOUISVILLE LIGHTWAVE; ALSO- DBA LEXINGTON LVW LOUISVILLE, KY LIGHTWAVE LOUISVILLE TWO-WAY RADIO SVC INC LTW LOW COUNTRY CARRIERS INC DBA HARGRAY LONG HGY HILTON HEAD, SC DISTANCE COMPANY LOWE, LEWIS L DBA TRIPLE L COMMUNICATIONS TIP BUENA VISTA, CO LOWRANCE SOUND & COMMUNICATIONS LSN UNION CITY, TN LOYD COMM DBA COMTEL OF HOT SPRINGS CHS HOT SPRINGS, AR LS-ONE, INC. LSX JACKSON, MS LSSI CORP LSJ EDISON, NJ LT&T VVN OPERATIONS LVN LINCOLN, NE LTK ENGINEERING INC LTK PHILADELPHIA, PA LTS INC LTQ JOPLIN, MO LTS OF ROCKY MOUNT, LLC LRO ROCKY MOUNT, NC LTT CELLULAR LTZ LINCOLN, NE LUBBOCK RADIO PAGING INC LRP LUCENT TECHNOLOGIES CANADA LTG MARKHAM, ON LUCRE, INC LUC GRAND RAPIDS, MI LVT CORP LVR CAMP DOUGLAS, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–119 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location LYNCH INTERACTIVE CORPORATION (PREV LYNCH LYN GREENWICH, CT CORPORATION) LYNK SYSTEMS, INC. LYS ATLANTA, GA M & L ENTERPRISES, INC. MSJ MIDVALE, ID M & M COMMUNICATIONS, INC. MVM STEVENS POINT, WI M P W PAGING MWG CARROLLTON, GA M T SYSTEM OF MN INC (NOW WESTERN WIRELESS CORP. MRS - PCF) M T SYSTEMS INC MTS M.L.M. TELECOMMUNICATIONS, INC. MKK HOT SPRINGS, AR M.R. COMMUNICATIONS, INC MHR SPRINGFIELD, MO M2 COMMUNICATIONS DBA DIAL LONG DISTANCE DSC NORTH MIAMI BEACH, FL BILLING SVCS. MABEL CELLULAR, INC. MQR MABEL, MN MAC WIRELESS, L.L.C. MWH CASCADE, IA MAC-TEL MAE SPRINGFIELD, MO MACTEL, INC MAQ ANCHORAGE, AK MACYS CALIFORNIA INC MYC SAN FRANCISCO, CA MADERA RADIO DISPATCH MDR MADISON COUNTY TEL. CO. INC. MNF HUTSVILLE, AR MADISON NETWORK SYSTEMS, INC MNK HAMEL, IL MADISON PAGING MPG MADISON RIVER COMMUN. LLC (PREV MEBTEL MIV MEBANE, NC INTEGRATED COM. SOLUTIONS) MADISON RIVER LONG DISTANCE SOLUTIONS, INC MOV CHAPEL HILL, NC MADISON RIVER TELEPHONE CO MVP MEBANE, NC MAGAZINE TELEPHONE COMPANY MGZ MAGAZINE, AR MAGCARD SERVICES INC MAG TUSCON, AZ MAGNACOM WIRELESS LLC. DBA PCS PLUS INC. PSX VANCOUVER, WA MAGUIRE ELECTRONICS MGU CARDONDALE, PA MAHAFFEY MESSAGE RELAY INC MHM MAHATTAN CABLE TV INC MHT NEW YORK, NY MAHORNEY ELECTRONIC PAGING MYE BUENA VISTA, CO MAIN CELLULAR MNE PORTLAND, ME MAIN STREET MEDIA MKS BEVERLY HILLS, CA MAINE TELEPHONE COMPANY MHF STANDISH, ME MAINLINE COMMUNICATIONS MLN MAINSTREAM COMMUNICATIONS, LLC DBA MZW CORAL GABLES, FL MAINSTREAM NEW MEDIA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–120 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MAINSTREAM PCS, LLC. MPF BERWYN, PA MAINSTREET COMMUNICATIONS, LLC MUQ SAUK CENTRE, MN MAMMOTH CELLULAR INC MMH SAN FRANCISCO, CA MANAGED NETWORK SYSTEMS INC. MGN WINDSOR, ON MANAGEMENT DATA SERVICES MGD MANAWA TELECOM, INC. MLF 131 2ND STREET, WI MANCHESTER MOBILEPHONE MAN MANHATTAN TELECOMM. CORP DBA METROPOLITAN MTV NEW YORK, NY TELECOMM. MANITWOC LONG DISTANCE SERVICE MTZ MANITWOC, WI MANNING MUNICIPAL COMMUNICATIONS & TELEVISION MVU MANNING, IA SYSTEMS UTILITY MANUEL TELCOM MUO WYLE, TX MAP MOBILE COMMUNICATIONS INC. MPX PHOENIX, AZ MARATHON COMMUNICATIONS INC MHZ SEATTLE, WA MARATHON MOBILE PHONE MMP MARATHON TELECOMMUNICATIONS CORP MHN VANCOUVER, BC, CN MARCATEL INTERNATIONAL LLC MJT MCALLEN, TX MARCOM SYSTEMS INC MSM MARCUS COMMUNICATIONS, LLC MJS MANCHESTER, CT MARIETTA FIBERNET MFR MARIETTA, GA MARIETTA MARINE COMMUNICATIONS MMC MARINE RADIO TELEPHONY CO INC MRT MARINE TELEPHONE COMPANY MNT MARINETTE RADIO PAGING SERVICES MRN MARINETTE-MENOMINEE LDS MMS MARINETTE, WI MARITIME TELEGRAPH AND TELEPHONE COMPANY, MHY HALIFAX, CN LIMITED MARK TWAIN LONG DISTANCE, INC (PREV MARK TWAIN MKA HUROLAND, MO COMMUN COMPANY MARK TWAIN LONG DISTANCE, INC. MKB HURDLAND, MO MARKETASIAN NETWORK, INC. MKW STANTON, CA MARMON GROUP INC MGP LOMBARD, IL MARMON TELEPHONE NETWORK MAR MARPLE-NEWTOWN TELEPHONE ANSWERING SERVICE MWL NEWTOWN SQUARE, PA MARQUETTE-ADAMS TELEPHONE COOPERATIVE, INC. MQA OXFORD, WI MARSCH COMMUNICATIONS MANAGEMENT (NOW TMC MSH VENTURA, CA COMM -TMZ) MARSHALL COMMUNICATIONS CORP MSL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–121 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MARSHALL LDDS MDD MARSHALL, MN MARTEL COMMUNICATIONS DBA MARIANNA-SCENERY MYH MARIANNA, PA HILL LONG DISTANCE CO. MARTELL TELECOM, INC DBA TRI-STATE LONG DISTANCE MOJ GLENNS FERRY, ID MARTIN MARIETTA INFORMATION & COMMUNICATIONS MMQ CHANTILLY, VA SYSTEMS MARVIN RHEINBOLDT TV & COMMUNICATIONS MRH MARYLANDERS AGAINST YOUTH SUICIDE MYS BROOKLANDVILLE, MD MASCOMM, LLC MZZ TARZANA, CA MASERGY COMMUNICATIONS INC MYX IRVING, TX MASKATEL INC MKL STE ROSALIE, PQ MASS CONNECTICUT MOBILE TELEPHONE CO MMT MASSENA TELEPHONE COMPANY MOO MASSENA, IA MASTER CALL COMMUNICATIONS, INC. MOX NEW YORK, NY MASTER CORP MSZ DALLAS, TX MASTERCARD INTERNATIONAL MSD ST LOUIS, MA MASTERFILES INC INFORMATION SERVICES MFL DALLAS, TX MATAGORDA TWO-WAY MGO BAY CITY, TX MATEWAN ELECTRICAL SERVICE MEL MATEWAN, WV MATGRIN MGR MATHEWS ANS SERVICE MWA MATRIX ASSOCIATES INC MAT MATRIX DATACOM INC. DBA MXD MXH COLLEGE STATION, TX MATRIX TELECOM MXT FORT WORTH, TX MATRIX TELECOM, INC. (PREV. NATIONAL NZT FORT WORTH, TX TELEPROCESSING, INC.) MAT-TELL COMMUNICATIONS, INC. MAO MIAMI BEACH, FL MAUI CELLULAR TELEPHONE CO MUI KIRKLAND, WA MAVERIX.NET, INC. MVE CHICAGO, IL MAW COMMUNICATIONS, INC. MJZ FLEETWOOD, PA MAXCESS, INC. MXE NEWBERRY, FL MAXCOM INCORPORATED MXR AURORA, CO MAXLINK COMMUNICATIONS INC MXK TORONTO, ON MAX-TEL COMMUNICATIONS, INC. MAX ALVOUD, TX MAXTEL CORPORATION MXL HARRISON, NJ MAXXIS COMMUNICATIONS, INC MXI TUCKER, GA MAY DEPARTMENT STORES CO MAY ST LOUIS, MO MAYDAY USA INC MDY HOUSTON, TX MAYFIELD ANSWERING SERVICE MFA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–122 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MBO WIRELESS MWX EARLSBORO, OK MBS COMMUNICATIONS INC PGS SOUTH GATE, CA MC CAIN COMMUNICATION MCN MC CAW CELLULAR ONE MCE OK CITY, OK MC CAW COMMUNICATIONS MCQ FRESNO, CA MC CAW TELECOMMUNICATIONS MCW MC CAW TELEPAGE MTL MC CELLULAR CSG SPRINGFIELD, MO MC WIRELESS, INC. MJE SAN ANTONIO, TX MCBLUE TELECOM, INC. MJV WESTLAKE VILLAGE, CA MCCA MICROWAVE MMW GARDEN GROVE, CA MCCA OF TENNESSEE MCC MCCORD COMMUNICATION SERVICE INC MCD MCD TELECOMMUNICATIONS, INC. DBA TELECOM MCD MZD DALLAS, TX MCDONALD COUNTY LONG DISTANCE COMPANY MYD PINEVILLE, MO MCELROY ELECTRONICS CORPORATION MYL SHIRLEY, MA MCG, LLC. MYG COCONUT GROVE, FL MCGEE COMMUNICATIONS ELECTRONICS INC MGE STOCKTON, CA MCGRAW COMMUNICATIONS, INC. MWN NEW YORK, NY MCI (PREV MCI TELECOMMUNICATIONS CORP - SOUTH MCK RICHARDSON, TX EAST) MCI (PREV. MCI TELECOMMUNICATIONS CORP - PACIFIC MCG RICHARDSON, TX DIV) MCI (PREV. RCA GLOBAL COMMUNICATIONS INC) RCG RICHARDSON, TX MCI AIRSIGNAL INC MAS CHICAGO, IL MCI AIRSIGNAL INC (WILMINGTON) MAW MCI AIR-SIGNAL OF INDIANA INC MSG MCI AIRSIGNAL OF PHILA PA INC MAP MCI AIRSIGNAL OF PITTSBURGH PA INC MPU MCI AIRSIGNAL TELECOMMUNICATIONS INC MST MCI CELLCOM CELLULAR MLL MCI INTERNATIONAL MCX MCI METRO ACCESS TRANSMISISON (PREV TMN TELECOM*USA) MCI METRO ACCESS TRANSMISSION (PREV BCS L.D. COE MADISON, WI SERIVCE TELECOM*USA) MCI METRO ACCESS TRANSMISSION (PREV TEM SOUTHERNENT TELECOM*USA) MCI METRO ACCESS TRANSMISSION (PREV TELECOM SLS ATMORE, AL USA)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–123 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MCI METRO ACCESS TRANSMISSION SVCS INC(PREV WUA RICHARDSON, TX ACCESS TRAN.SVCS INC) MCI TELECOMMUNICATIONS MCI RICHMOND, VA MCI TELECOMMUNICATIONS CORP - SOUTH WEST MCJ ST LOUIS, MO MCI(PREV SOUTHERNET NOW MCI METRO ACCESS SNT RICHARDSON, TX TRANSMISSION -WUA) MCI/1-800-COLLECT(PREV SATELLITE BUSINESS SBX RICHARDSON, TX SYSTEMS) MCI/RSA INC MRA ROSWELL, GA MCKEEVER COMMUNICATIONS INC MKV DECATUR, IL MCLANG CELLULAR INC MLZ POTOMAC, MD MCLEOD USA INFORMATION SERVICES INC (PREV SPV WOODLANDS, TX SPLITROCK SERVICES INC) MCLEODUSA (PREV ACCESS LONG DISTANCE (PREV AMM SALT LAKE CTY, UT ACCESS COMM) MCLEODUSA TELECOMMUNICATION SERVICES. INC IOR DES MOINES, IA (PREV MCLEOD NETWORK) MCMANUS COMMUNICATIONS MNU BLYTHEVILLE, AR MCNABB LONG DISTANCE, INC NBB MCNABB, IL MCV TELCOM MVT ARLINGTON, TX MEADE ASSOCIATES MDE PHILADELPHIA, PA MED ATLANTIC TELEPHONE MED GREENSBORO, NC MEDCOM OF RALEIGH MFH RALEIGH, NC MEDE AMERICA (PREV. GENERAL COMPUTER CORP.) GCP TWINSBURG, OH MEDIA 4 MDF OAK BROOK, IL MEDIA COMMUNICATIONS OF AUSTIN MAU AUSTIN, TX MEDIAONE OF DELAWARE, INC(PREV CONTINENTAL CCV SOUTHFIELD, MI CABLEVISION) MEDICAID MDJ DENVER, CO MEDICAL DENTAL BUREAU INC MDB MEDICAL SOCIETY OF SEDGWICK COUNTY MYW WICHITA, KS MEDICINE MAN PAGING MMX CLARKSVILLE, AR MEG RADIO, INC MFF NEWARK, NJ MEGA COMM LLC MGK ROSELLE, NJ MEGACLEC, INC. MGQ FALL RIVER, MA MEGACOMM CORP MGC DAVENPORT, IA MEGA-TEL CELLULAR III MGT EDEN PRARIE, MN MEGATEL CORPORATION MGX ENGLEWOOD, NJ MEGAWATS MGW SAN FRANCISCO, CA MEGAWORLD MQW HACKENSACK, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–124 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MEGSINET-CLEC, INC. MEV CHICAGO, IL MEIER-FRANK CO MRF PORTLAND, OR MELBOURNE INTERNATIONAL COMMUNICATIONS LTD MBU PALM BAY, FL MELLON BANK NA MBK PITTSBURGH, PA MELROSE COMMUNICATIONS, INC MUZ MELROSE, MN MEMBERS FINANCIAL SERVICE BUREAU (THE) MFB PHOENIX, AZ MEMPHIS NETWORK LLC MHQ MEMPHIS, TN MENDELSSOHN GROUP MNH KENNEDALE, TX MERCED TELECOM MDM FRESNO, CA MERCEDNET, INC. MQD MERCED, CA MERCHANT-LINK INC MLW VIENNA, VA MERCURY CELLULAR OF KANSAS, INC. MYK LAKE CHARLES, LA MERCURY COMMUNICATIONS COMPANY MRY JACKSON, MS MERCURY COMMUNICATIONS, INC. MEI WILLISTON PARK, NY MERCURY INC MUY SUPLHUR, LA MERCURY MESSAGE PAGING, INC. MYI RIVERDALE, MD MERCURY TELECOM (USA) INC MKM NEWARK, NJ MERETEL COMMUNICATIONS LLP MEK GONZALES, LA MERETEL COMMUNICATIONS, L.P. MLU DALLAS, TX MERIDIAN TELECOM CORPORATION MDH WOODSTOCK, GA MERIDIAN TELECOM, INC. MKD KISSIMMEE, FL MERIMAC TELECOMMUNICATIONS CORP MEA APPLETON, WI MERRILL LYNCH PIERCE FENNER & SMITH INC MLP NEW YORK, NY MESCALERO APACHE TELECOM, INC. MHK MESCALERO, NM MESCELLCO COMMUNICATIONS INC MLO JACKSON, MS MESSAGE CENTER MCR MESSAGE CENTER INC MCT BURLINGTON, VT MESSAGE CENTRAL MCL MESSAGE EXPRESS COMPANY MEX DELTON, MI MESSAGES BY RADIO INC MRD MET COMMUNICATIONS, INC. MEU APOLLO BEACH, FL METACOMM CELLULAR PARTNERS MQP WAYNE, NJ METAGRAM AMERICA INC MAZ PLANO, TX METAGRAM AMERICA INC MGA CHICAGO, IL METAMORA TELEPHONE COMPANY MMK METAMORA, IL METCOM INCORPORATED MMJ PLAINVIEW, NV METER MASTER MTM DENVER, CO METRICOM, INC. MJM BURR RIDGE, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–125 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location METRO AMERICA COMMUNICATIONS MTA ATLANTA, GA METRO AREA USERS ASSOC MUA FREMONT, NE METRO BEEPER INC MEB SAN JUAN, PR METRO COMMUNICATIONS SERVICES MSV METRO CONNECTION INC MQC DENTON, TX METRO CONNECTION INC MQT DENTON, TX METRO DISPATCH INC. MJW GRAND FORKS, ND METRO ELETRONICS TELECOM SYSTEMS LTD MET METRO FIBERLINK, INC. MEF BOCA RATON, FL METRO FONE COMMUNICATIONS INC MFN METRO MEDIA TELECOMMUNICATIONS SVR METRO MOBILE MIE WALLINGFORD, CT METRO MOBILE MMO CHARLOTTE, NC METRO MOBILE CTS MMZ NEW YORK, NY METRO OF ATHENS INC MOA METRO OF LAUREL MOL METRO ONE MON ROCHELLE PARK, NJ METRO ONE TELECOMMUNICATIONS MOS BEAVERTON, OR METRO ONE TELECOMMUNICATIONS, INC (PREV METRO MDI BEAVERTON, OR ONE DIRECT INFO) METRO RADIO PHONE MRI METRO RADIO PHONE OF WISCONSIN MRW METRO TELECOM INC MEO MARIETTA, GA METRO TELECOMMUNICATIONS SERVICES INC(PREV TMC TWH WASHINGTON, DC OF WA DC) METRO TELECONNECT, INC. MXO GAITHERSBURG, MD METRO TELEPHONE INC MHE PEORIA, IL METRO WORLD COMMUNICATIONS INC MWC METROCALL OF PA MCP METROCALL, INC MRZ ALEXANDRIA, VA METROCALL/FIRST PAGE MFG MOUNT LAUREL, NJ METRO-COM, INC. MXM OMAHA, NE METROCOMM FIBER OPTIC NETWORK MFP COLUMBUS, OH METROCOMM INC MOC COLUMBUS, OH METROLINE INC MRL POTTSBORO, TX METROLINK (PREV. GLOBAL ONE INC.) GOI CHICAGO, IL METRO-LINK TELECOM MLK TEXAS CITY, TX METROLINK(PREV. AMERICAN TELETRONICS NETWORK AWQ CHICAGO, IL SERVICES, INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–126 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location METROMAIL CORP MZM LOMBARD, IL METROMEDIA FIBER NETWORK, INC MFW NEW YORK, NY METROMEDIA PAGING MZP RIDGEFIELD PARK, NJ METROMEDIA PAGING SERVICES MEP AUSTIN, TX METROMEDIA PAGING SERVICES MMD SCHAUMBURG, IL METROMEDIA PAGING SERVICES MTG ENGLEWOOD CLIFFS, NJ METRONET LONG DISTANCE COMMUNICATIONS INC MLD HOLP, MI METROPAGE MEG NORMAL, IL METRO-PAGE OF AZ MPA METRO-PAGE OF COLUMBUS INC MPC METROPCS CALIFORNIA/FLORIDA, INC. MZF SUNRISE, FL METROPCS GEORGIA, INC. MZG DUNWOODY, GA METROPCS INC. MQS WALNUT CREEK, CA METROPHONE MOE PHILADELPHIA, PA METROPHONE LTD. MHO HOUSTON, TX METROPOLITAN FIBER SYSTEMS INC MTF NEW YORK, NY METROPOLITAN FIBER SYSTEMS OF CHICAGO INC MPL OAKBROOK TERRACE, IL METROPOLITAN MOBILE TELEPHONE CO MPM CHICAGO, IL METROTEC MTE METROTEC INC MTT METROTEL MQL DENTON, TX METROTIME COMMUNICATIONS MRU FT. WORTH, TX METROWIDE INTERNATIONAL COMMUNICATIONS MWD REXDALE, ON METSTREAM COMMUNICATIONS, INC. MEJ BEAVERTON, OR MEZCO, LLC. MZO ADAMS, MA MFG SERVICES, INC. MFV SANTA FE, NM MFN COMMUNICATIONS MFX DALLAS, TX MFS DATANET, INC. MFD SAN JOSE, CA MGW LONG DISTANCE, L.L.C. MZI WILLIAMSVILLE, VA MGW NETWORKS, L.L.C. MGJ WILLIAMSVILLE, VA MH COMMUNICATIONS, INC. MHS MOUNT HOREB, WI MH TELECOM, INC. MHX MOUNT HOREB, WI MIAMI VALLEY RADIOTELEPHONE MVR MICAL PROPERTIES INC MPD YONKERS, NY MICHAEL BRINKMAN DBA TEXAS TELE BTX ELGIN, TX COMMUNICATIONS MICHIGAN 6 CELLULAR LP MRQ ROSWELL, GA MICHIGAN 7 CELLULAR LP LBM ROSWELL, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–127 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MICHIGAN BELL TELEPHONE CO MIB DETROIT, MI MICHIGAN MESSAGE CENTER MGG KALAMAZOO, MI MICHTEL, INC. MHI FARMINGTON, MI MICOR COMMUNICATIONS, INC. MQU TUCKER, GA MICRO LIGHT COMMUNICATIONS INC MLH ALBUQUERQUE, NM MICRO TEL IOT BOCA RATON, FL MICROCELL CONNEXIONS, INC. MXS MONTREAL, PQ MICRO-COMM TELECOMMUNICATIONS MII MOBILE, AL MICRONESIAN TELECOMMUNICATIONS CORPORATION MIO SAIPAN, CMWL N MARIANAS, NN MICRONET INC MNI JAMINSON, PA MICROPATH MAH ALBERQUERQUE, NM MICROSUN TELECOMMUNICATIONS, INC. MUU FT. LAUDERDALE, FL MICROVOICE MVA MINNEAPOLIS, MN MID AMERICAN TECHNOLOGIES INC MER OMAHA, NE MID ATLANTIC COMMUNIICATIONS INC (INVALID) MDN OWNINGS MILS, MD MID ATLANTIC TELECOM MDA MC LEAN, VA MID ATLANTIC TELECOM CORP TSR OWINGSMILLS, MD MID ATLANTIC TELECOM OF VIRGINIA MAV RICHMOND, VA MID ATLANTIC TELEPHONE MLE GREENSBORO, NC MID CENTURY TELEPHONE CO-OPERATIVE MYU CANTON, IL MID MAINE TELECOM MAK BANGOR, ME MID MCND DBA MIDCOM COMMUNICATIONS INC. AZN SETTLE, WA MID SEA DBA MIDCOM COMMUNICATIONS INC. MIZ SEATTLE, WA MID TEL LD INC MDZ WILLISTON, ND MID TNC DBA MIDCOM COMMUNICATIONS INC. TZX SEATTLE, WA MID-AMERICA BCSTG MAB CHARLOTTE, MI MID-AMERICAN COMMUNICATIONS CORP MIA MID-AMERICAN TELEPHONE COMPANY MIK EASTPOINTE, MI MIDCO COMMUNICATIONS MDU SIOUX FALLS, SD MIDCOM COMMUNICATIONS INC. CQE SOUTHFIELD, MI MIDCOM INC MOM BISMARCK, ND MIDCOM OF TUCSON MDL TUCSON, AZ MID-CONTINENT COMMUNICATIONS MNM EDMOND, OK MIDCO-TEL MID SIOUX FALLS, SD MIDDLESEX CELLULAR MXC MIDDLESEX, NJ MIDDLETOWN TELECOM INC MXW MARLTON, NJ MID-HUDSON COMMUNICATIONS, INC. MIH CATSKILL, NY MID-IOWA LONG DISTANCE, INC. MWO GILMAN, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–128 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MID-IOWA TELEPHONE CO-OP ASSOCIATION MAJ GILMAN, IA MIDLAND COMMUNICATIONS CORP MLA MIDLAND, TX MID-MAINE TELPLUS DBA MID-MAINE LONG DISTANCE MIP BANGOR, ME MID-MISSOURI CELLULAR MME SEDALIA, MO MID-MO MOBILFONE MMM MID-RIVERS LONG DISTANCE, INC. MVL CIRCLE, MT MID-RIVERS TELEPHONE CO-OP, INC MRV GLENDIVE, MT MID-SOUTH COMMUNICATIONS MSC MID-STATE ELECTRONICS MSE WENATCHEE, WA MID-STATE PAGING, INC. MGI TRENTON, NJ MID-STATE SYSTEMS INC MSS MIDSTATE TELECOM, INC. MJA KIMBALL, SD MID-TEX CELLULAR MDX SAN ANGELO, TX MID-TOWN COMMUNICATIONS MDT MIDVALE TELEPHONE EXCHANGE INC MVG MIDVALE, ID MIDWEST CELLULAR TELEPHONE CO., DBA CELLULAR OSU OKLAHOMA CITY, OK ONE MIDWEST COMMUNICATIONS INC MIS GRAND ISLAND, ME MIDWEST FIBERNET INC MFI MATTOON, IL MIDWEST MOBILE MWM MIDWEST MOBILE COMMUNICATION MWE WINNER, SD MIDWEST TELCOM COMPANY (MICHIGAN) MFT WARREN, MI MIDWEST TELECOM MWS CHICAGO, IL MIDWEST TELECOM OF AMERICA, INC MWY MERRILLVILLE, IN MIDWEST TOWERS, INC. MEW EAST GRAND FORKS, MN MIDWEST VOICE AND DATA NETWORKS, LLC. MVD MADISON, WI MIDWEST WIRELESS COMMUNICATIONS, L.L.C. MBB MANKATO, MN MIDWEST WIRELESS COMMUNICATIONS, L.L.C. DBA CUU MANKATO, MN CELLULAR 2000 MIDWESTERN RELAY SUB OF MRC MWR MILWAUKEE, WI TELECOMMUNICATIONS INC MIDWESTERN TELECOMMUNICATIONS, INCORPORATED MWU CHICAGO, IL MIE TELECOM, INC. MIY FT WAYNE, IN MILES COMMUNICATIONS INC DBA ENHANCED MHB SUNMAN, IN TELECOMMUNICATIONS CORP MILITARY COMMUNICATIONS CENTER INC MTY EDEN PRAIRIE, MN MILLEDGEVILLE MOBILEFONE INC MMF MILLENNIUM 2000, INC. DBA INTOUCH COMMUNICATIONS IMU HARRISONBURG, VA MILLENNIUM ONE COMMUNICATIONS, INC. MUB ARLINGTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–129 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MILLENNIUM OPTICAL NETWORKS NORTH AMERICA, INC. MKO NEW YORK, NY MILLENNIUM TELCOM, L.L.C. DBA ONE SOURCE MLJ DENISON, TX COMMUNICATIONS MILLENNIUM WIRELESS GROUP, INC. MWP WOODBURG, NY MILLI COM INC MIL RALEIGH, NC MILLICOM TELECOMMUNICATIONS SERVICES INC MLM NEW YORK, NY MILLINGTON TELEPHONE COMPANY INC. IGN MILLINGTON, TN MILLRY COMMUNICATION, INC. MYO MILLRY, AL MILLRY TELEPHONE COMPANY, INC. MYR MILLRY, AL MILWAUKEE TELEPHONE CO. DBA CELLULAR ONE AND MKT WAUKESKO, WI CELLULAR1/E.WISCONSI MIMA INC MIM MINERICH INC MIR RICHMOND, KY MINH LONG DISTANCE MHL FORT WORTH, TX MINIMUM RATE PRICING INCORPORATED MIG BLOOMFIELD, NJ MINNESOTA COMMUNICATIONS MNC MINNESOTA EQUAL ACCESS SERVICES INC MEQ EDEN PAIRIE, MN MINNESOTA MOBILE RADIO INC MMR MINNESOTA MOBILE TELEPHONE MNN MINNESOTA POWER TELECOM INC MPJ DULUTH, MN MINNESOTA REGIONAL NETWORK MRG MINNEAPOLIS, MN MINNESOTA SOUTHERN CELLULAR TELEPHONE CO MSO MANKATO, MN MINTELCO LDS INC MIN BRAINERD, MN MIRACLE COMMUNICATIONS MNV FORT WORTH, TX MISSION NETWORKS, LLC. MWJ TRAVERSE CITY, MI MISSISSIPPI-1 CELLULAR TELEPHONE COMPANY, INC. CWJ LAKE CHARLES, LA MISSOURI CELLULAR LIMITED PARTNERSHIP(NOW MSQ ROSWELL, GA WESTERN WIRELESS-PCF) MISSOURI LOTTERY MIU JEFFERSON CITY, MO MISSOURI NETWORK ALLIANCE, LLC MKI KANSAS CITY, MO MISSOURI PAGING SERVICES INC MPS MISSOURI TELECOM, INC. MSF ALIQUIPPA, PA MITCHELL LD SERVICE MHD DALLAS, TX MITCHELL MOBILE TELEPHONE MMB MITCHELL RADIO PAGING MRP M-K TECHNOLOGIES MRK BOISE, ID MM ANSWERING SERVICE INC MMA MMT GORI, INC. MGY MONONGAHELA, PA MO-ARK MOBILEPHONE INC MAM

Proprietary — Licensed Material See proprietary restrictions on title page. 8–130 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MOBAPHONE DISPATCH SERVICE CO MDS MOBEX NETWORK SERVICES COMPANY MKY NEWPORT BEACH, CA MOBIL OIL CREDIT CORP MBO KANSAS CITY, MS MOBIL TALK INC MTK MOBILCOM MOBILE COMMUNICATION SERVICE MOB MEADVILLE, PA MOBILCOM OF MEADVILLE MDV MEADVILLE, PA MOBILCOMM OF LONGBEACH MLB LONGBEACH, CA MOBILE - PAGING COMMUNICATIONS MOP MADISON, SD MOBILE COMMUNICATION SERVICE INC MBE MEADVILLE, PA MOBILE COMMUNICATIONS CORP OF AMERICA MLC MOBILE COMMUNICATIONS CORPORATION OF AMERICA MBA MOBILE COMMUNICATIONS INC MCM MOBILE COMMUNICATIONS OF AMERICA MCA MOBILE COMMUNICATIONS SERVICES INC MCS MOBILE COMMUNICATIONS SVC. OF BOWLING GREEN, MSB BOWLING GREEN, KY INC. MOBILE DISPATCHING SERVICE MDP MOBILE ELECTRONICS INC MOZ WICHITA, KS MOBILE FONE OF JACKSON HOLE INC MTJ MOBILE PARTNERS CORP. MPE BRONX, NY MOBILE PHONE OF CHARLESTON MCH MOBILE PHONE OF OKLAHOMA MOK LAWTON, OK MOBILE PHONE OF TEXAS INC MPT MOBILE PHONE WEST MPW MOBILE PHONES & PAGING MBH GOLDEN, CO MOBILE RADIO COMMUNICATIONS INC MRC KANSAS CITY, MO MOBILE RADIO COMMUNICATIONS SERVICE MLR MOBILE RADIO COMMUNICATIONS SERVICES INC MRO MOBILE RADIO MESSAGE SERVICE INC MRM MOBILE RADIO SYSTEMS OF SAN JOSE MBS MOBILE RADIO SYSTEMS OF VENTURA MBV MOBILE RADIO TELEPHONE SERVICE MLT MOBILE RADIOTELEPHONE & PAGING MBL MOBILE RELAY ASSOCIATES INC MYA PARAMOUNT, CA MOBILE TELECOMMUNICATION TECHNOLOGIES MBX JACKSON, MS MOBILE TELECOMMUNICATIONS MTC MOBILE TELENET CORP MBZ HOUSTON, TX MOBILE TELEPHONE AND PAGER INC MTP KAMUELA, HI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–131 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MOBILE TELEPHONE COMPANY OF NJ MTN MOBILE TELEPHONE INC MBT MOBILE TELEPHONE OF SOUTHERN UTAH MSU MOBILE TELEPHONE SERVICE OF WHEELING MBW WHEELING, WV MOBILE TELETALK TEXAS 4 BRISCOE INC MXZ CHARLOTTESVILLE, VA MOBILE U.H.F. INC MUF GARDEN GROVE, CA MOBILECOMM MBC SCHAUMBURG, IL MOBILECOMM MEM RIDGELAND, MS MOBILECOMM - A BELLSOUTH CO MBQ RIDGELAND, MS MOBILECOMM - A BELLSOUTH CO - ENGLEWOOD MBN ENGLEWOOD, NJ MOBILECOMM OF MOUNTIANVIEW MMV MOUNTAINVIEW, CA MOBILECOMM OF SAN ANTONIO MSA SAN ANTONIO, TX MOBILECOMM OF WISCONSIN INC MWI MILWAUKEE, WI MOBILEFONE MBF MOBILEFONE COMMUNICATIONS INC MFC MOBILEFONE NORTHWEST MPN SPOKANE, WA MOBILEFONE NORTHWEST (LEWISTON) MNL MOBILEFONE NORTHWEST (MOSSES LAKE) MML MOBILEFONE NORTHWEST (SPOKANE) MNS MOBILEFONE NORTHWEST PASCO MNP MOBILEFONE NORTHWEST WALLA WALLA MWW MOBILEFONE NORTHWEST YAKIMA MNY MOBILEFONE OF NORTHEASTERN PENNSYLVANIA INC MPV MOBILEMEDIA COMMUNICATION, INC.(PREV. MPI ST LOUIS, MO METROMEDIA PAGING SERVICES) MOBILEMEDIA COMMUNICATIONS, INC. (PREV. INC LA PALMA, CA INDUSTRIAL COMM. SYSTEMS) MOBILEMEDIA PAGING AND PERSONAL/COM SERVICES MPP COLUMBIA, MD MOBILEPHONE OF HUMBOLDT, INC. MHW EUREKA, CA MOBILEPHONE SYSTEMS MPH MOBILETEL MQB LAROSE, LA MOBILFONE INC MFO MOBILFONE NORTHWEST INC MNW MOBILFONE OF ERIE INC MFE ERIE, PA MOBILFONE OF KANSAS MFK MOBILFONE SERVICES INC MFS MOBILPAGE COMMUNICATIONS MBG PORT ANGELES, WA MOBILPAGE INC MOG ST JOSEPH, MO MO-BILPAGE INC MBP

Proprietary — Licensed Material See proprietary restrictions on title page. 8–132 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MOBILPHONE AND BEEPER INC MPB MOBILPHONE EXCHANGE OF SANDUSKY INC MES MOBILPHONE OF WESTERN KANSAS MWK DIGMTON, KS MOBILPHONE PAGING RADIO MPR MOBILTALK CELLULAR INC MKC FORT MYERS BEACH, FL MOBIL-TEL NETWORK MBI ENCINO, CA MOBIUS COMMUNICATIONS COMPANY MZS HEMINGFORD, NE MOCK’S 2-WAY RADIO MKZ STUTTGART, AK MODERN COMMUNICATIONS MDC ALTOONA, PA MODERN COMMUNICATIONS CORP MCU MODERN COMMUNICATIONS CORP MDQ ALTOONA, PA MODULAR DATA INC MOD EL MONTE, CA MOHEGAN TELECOMMUNICATIONS, LLC. MQE UNCASVILLE, CT MOLALLA TELEPHONE COMPANY MJL MOLALLA, OR MOMENTUM BUSINESS SOLUTIONS, INC. MUK BIRMINGHAM, AL MOMENTUM TELECOM MEE MILL VALLEY, CA MONAD FEDERAL CREDIT UNION MND MONARCH COMMUNICATIONS MZC COEUR’D ALENE, ID MON-CRE TELEPHONE COOPERTIVE, INC. MNJ RAMER, AL MON-CRE WIRELESS, INC. DBA MON-CRE LONG DISTANCE MNZ RAMER, AL MONMOUTH CELLULAR ONE MHC FREEHOLD, NJ MONMOUTH TELEPHONE AND TELEGRAPH INC MGF RED BANK, NJ MONROE RADIOTELEPHONE MNR MONROE TELEPHONE COMPANY MYN MONROE, OR MONTANA ADVANCED INFORMATION NETWORK, INC. MVI FAIRFIELD, MT MONTANA CELLULAR TELEPHONE CO MCV MISSOULA, MT MONTANA LEGAL SERVICES ASSOCIATION MLV HELENA, MT MONTANA LONG DISTANCE INC MOT BILLINGS, MT MONTANA POWER CO MNA BUTTE, MT MONTANA TEL-NET MNQ LOLO, MT MONTANA WIRELESS, INC. MOW MISSOULA, MT MONTEL COMMUNICATIONS INC MLQ MONROEVILLE, AL MONTHLY PHONE SERVICES, INC. (PREV. PHONE CALLS, PPP AURORA, IL INC.) MOORE DATA MANAGEMENT SERVICES DIVISION MDG MINNEAPOLIS, MN MORAINE RADIO MRR WEST BEND, WI MORGAN STANLEY AND COMPANY MSY NEW YORK, NY MORNINGSTAR COMMUNICATIONS, INC. MGS DUNCANVILLE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–133 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MORRIS COMMUNICATIONS INC MCO MORTECH INDUSTRIES MTH WOODSTOCK, GA MOSSEL JAMAICA LIMITED MJI KINGSTON, JM MOTELCO INC MTO MOTOR INN INC MTR MOTOROLA COMMUNICATIONS AND ELECTRONICS INC MOR SAN DIEGO, CA MOTOROLA INC MZT FORT WORTH, TX MOULTRIE INDEPENDENT TELEPHONE COMPANY MYP LOVINGTON, IL MOUNDRIDGE TELCOM, INC. MIQ MOUNDRIDGE, KS MOUNDVILLE TELEPHONE COMPANY MQV MOUNDVILLE, AL MOUNT VIEW COMMUNICATIONS INC MVC MOUNTAIN COMMUNICATIONS INC MTU AVON, CO MOUNTAIN COMMUNICATIONS INC. MNX PUEBLO, CO MOUNTAIN MESSAGE & PAGER SERVICE INC MSP GRAND JUNCTION, CO MOUNTAIN MOBILE COMMUNICATIONS MUN REDDING, CA MOUNTAIN PAGING NETWORK INC MUP KALIPSELL, MT MOUNTAIN RURAL TELEPHONE COOPERATIVE MUJ WEST LIBERTY, KY CORPORATION, INC MOUNTAIN SOLUTIONS, LTD MUV LAKEWOOD, CO MOUNTAIN TELECOMMUNICATIONS INC MTI MOUNTAIN TELECOMMUNICATIONS, INC. MIX TUCSON, AZ MOUNTAIN VIEW TELEPHONE COMPANY MVH MOUNTAIN VIEW, AR MOUNTAIN WEST INTERNET, INC. MZU MISSOULA, MT MOUNTAIN WEST LONG DISTANCE MWQ ORANGEVILLE, UT MOUNTAINEER CELLULAR GENERAL PARTNERSHIP MOU HINDMAN, KY MOUNTAINET LONG DISTANCE, INC. MXD GATE CITY, VA MOUNTAINET TELEPHONE COMPANY MJN GATE CITY, VA MOUNTAINET, INC. MOF GATE CITY, VA MOUNTAINVIEW COMMUNICATIONS, INC. MVW RANDOM LAKE, WI MOVIE, TELEVISION, & GRAPHICS CORP. DBA M.T.G. MVS MIAMI, FL MPA-MOBILE PHONE ANSWERING SERVICE MHA DUMAS, TX MPC BUSINESS COMMUNICATION SYSTEMS INC/EASTON MPZ POMPANO BEACH, FL TELECOM SERVICES MPOWER COMMUNICATIONS CORP (PRV MGC COMMUN., NVE LAS VEGAS, NV INC MR AUSTIN A CALDWELL MAC MR BEEPER INC MBJ SAN JUAN, PR MSI TELECOMMUNICATIONS MSI BROOKVILLE, FL MSN COMMUNICATIONS, INC. MSX CARESBAD, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–134 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MT BEACON MOBILE TELEPHONE INC MBM MT SHASTA RADIO TELEPHONE MSR MTA LONG DISTANCE, INC. MDK WASILLA, AK MTC COMMUNICATIONS, INC. MUG COLCHESTER, IL MTC TELEMANAGEMENT CORPORATION MLY PETALUMA, CA MTCO COMMUNICATIONS, INC MOY METAMORA, IL MTE, INC MEZ LANGLEY PARK, MD MTEL LONG DISTANCE INC MPY MILLINGTON, TN MTI MANAGEMENT LTD MMG FT WAYNE, IN MTS COMMUNICATIONS, INC. (PREV MTS NETCOM, INC.) MXN WINNIPRG, MB MTS-TAMPA INC MTQ TAMPA, FL MTX COMMUNICATIONS CORP MXX NEW YORK, NY MULBERRY TELECOMMUNICATIONS, INC. MYV MULBERRY, IN MULTI CALL UNIVERSAL MCF FT LAUDERDALE, FL MULTI COMPUTER SYSTEMS INC MLI ADDISON, IL MULTIBAND COMMUNICATIONS INC MNB Bozeman, MT MULTI-CALL MUL MULTI-CHANNEL SYSTEMS, INC. MMU ADDISON, TX MULTICOMM COMMUNICATION TOWERS MUW WILLIAMSBURG, PA MULTICON TELECOM NETWORK INC MUC DALLAS, TX MULTIMEDIA HYPERION TELECOMMUNICATIONS MYT WICHITA, KS MULTIMEDIA LONG DISTANCE COMPANY MLX ATLANTA, GA MULTIPHONE LATIN AMERICA, INC. MQM MIAMI, FL MULTITECHNOLOGY SERVICES, L.P. MHG RICHARDSON, TX MUNICIPAL ELECTRIC AUTHORITY OF GEORGIA MEY ATLANTA, GA MUNSON RADIO MRX GREAT FALLS, MT MUSKOGEE BEEPERS MBR MUSKOGEE TWO-WAY MTW MUSTANG COMMUNICATIONS MUS DENVER, CO MUSTANG COMMUNICATIONS CORPORATION MGV HECTOR, MN MUSTANG OPERATORS MPO DALLAS, TX MUSTANG TELECOM INC MNG HOUSTON, TX MUTH COMMUNICATIONS MUH MITCHELL, SD MUTUAL INFORMATION EXCHANGE, INC. MUX GRAND RAPIDS, MI MUTUAL SIGNAL CORPORATION MUT SAN FRANCISCO, CA MVX COMMUNICATIONS LLC MVX SAN MATEO, CA MWU FIBERCOM MWF ST LOUIS, MO MY-COMM INC MYM EUGENE, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 8–135 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location MYRIAD DEVELOPMENT INC (WHOLLY OWNED SUB OF MZY AUSTIN, TX MYRIAD DATA, INC.) N C P T CELLULAR INC NPT SOQUEL, CA N C TELECOM, INC. NOQ MEEKER, CO N.P.H. COMMUNICATIONS NPZ SAN ANTONIO, TX NA COMMUNICATIONS, INC NAU ABINGDON, VA NACC-TEL PAGING (PREV PAGERS PLUS CELLULAR) PRU YUBA CITY, CA NACT (PREV. NETWORK TELEMANAGEMENT SERVICES) NTG OREM, UT NANKEE INCORPORATED NNK COLLEGE PARK, MD NAS GLOBAL NETWORKS, INC. NGR BOWIE, MD NATCO TECHNOLOGIES, INC. NOG FLIPPIN, AR NATEL L.C. NAF FAIRFIELD, IA NATIONAL BRANDS INC NBI PHOENIX, AZ NATIONAL BUSINESS EXCHANGE, INC. NBE PASADENA, CA NATIONAL CALLING PLAN, INC. NLP OSSINING, NY NATIONAL CASH REGISTER NCH NATIONAL CELLULAR, LLC NCZ WALLINGFORD, CT NATIONAL COMM CO INC NCO NATIONAL COMM LINK, LLC NCK NORTH MIAMI BEACH, FL NATIONAL COMMUNICATIONS CO NCC NATIONAL COMMUNICATIONS CORP NIO AUSTIN, TX NATIONAL COMMUNICATIONS NETWORK NCN NEW YORK, NY NATIONAL COMMUNICATIONS NETWORK NNT FT LAUDERDALE, FL NATIONAL COMMUNICATIONS NETWORK (PREV ATS ATO COMMS INC) NATIONAL COMMUNICATIONS, LLC NLO MILWAUKEE, WI NATIONAL COMTEL NETWORK INC NCW TARZANA, CA NATIONAL DATA NLD NATIONAL DIGITAL SUBSCRIBER LINE.COM INC. NGS HICKSVILLE, NY NATIONAL DIRECTORY ASSISTANCE, LLC. NDR LOUISVILLE, KY NATIONAL ECONO-TEL NTL NATIONAL EXCHANGE NEX BOLDER, CO NATIONAL EXCHANGE OF SEATTLE INC NES NATIONAL FIBER COM, INC. NFC WAXAHACHIE, TX NATIONAL FIBERNET INC NFB DE SOTA, TX NATIONAL GATEWAY TELECOM INC SGW NEW YORK, NY NATIONAL IMS CORP NIM NATIONAL INDEPENDENT CARRIER EXCHANGE GLD FREEHOLD, NJ INC(PREV GRP LONG DIST,INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–136 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NATIONAL MOBILE COMMUNICATIONS CORP NMQ BURLINGTON, VT NATIONAL NETWORK TECHNOLOGIES, LLC NNH NEW YORK, NY NATIONAL NETWORKS COMMUNICATIONS SPECIALISTS NNS BOISE, ID NATIONAL PAGE INC NPG NATIONAL PAYPHONE SUPPLY NPH DENVER, CO NATIONAL PHONE CORPORATION NPX SARASOTA, FL NATIONAL PREPAID, INC. NPP WORTH, IL NATIONAL SHAWMUT BANK OF BOSTON NSB BOSTON, MA NATIONAL TELCOM MANAGEMENT, INC. NMA FT. LAUDERDALE, FL NATIONAL TELECOM NOM NATIONAL TELECOM INC NZL EDLNA, MN NATIONAL TELECOM, LLC NAK CROSSVILLE, TN NATIONAL TELECOMMUNICATIONS INC NTO PASCO, WA NATIONAL TELECOMMUNICATIONS NETWORK NTN NATIONAL TELEPHONE AND COMMUNICATIONS CORP NTE NATIONAL TELEPHONE COMPANY NTP NATIONAL TELEPHONE COMPANY OF ALABAMA DBA NOY CHEROKEE, AL CHEROKEE TELEPHONE CO NATIONAL TELEPHONE EXCHANGE NEH NEW YORK, NY NATIONAL TELEPHONE EXCHANGE NTX NATIONAL TELEPHONE EXCHANGE (HARRISBURG) NLE HARRISBURG, PA NATIONAL TELEPHONE OF AMERICA NAL NEW YORK, NY NATIONAL TELE-SAV INC NSV RENO, NV NATIONAL TELETALK TTK TUCUMCARI, NM NATIONAL TELSTAR INC NTR SPARKS, NV NATIONAL WATS NETWORK NWK NEW YORK, NY NATIONNET COMMUNICATIONS CORPORATION NNP JACKSON, MS NATIONSLINK COMMUNICATION, INC. NNU VALDOSTA, GA NATIONWIDE COMMUNICATION NWQ HOUSTON, TX NATIONWIDE COMMUNICATIONS INCORPORATED NND FARMINGTON HILLS, MI NATIONWIDE LONG DISTANCE (PREV. VADACOM) VDC HOUSTON, TX NATIONWIDE LONG DISTANCE, INC. NGD HOUSTON, TX NATIONWIDE PAGING CORP. NPR BELLROSE, NY NATIONWIDE PAGING INC NWP BURBANK, CA NATIONWIDE RSA SERVICE INC NAW VALLEY STREAM, NY NATIONWIDE TELECOM, INC. NDE BURLINGTON, NJ NATL EXCHANGE OF HARRISBURG NXH HARRISBURG, PA NAVIGATE NETWORKS INC. NNI BEVERLY HILLS, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–137 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NAVIGATOR TELECOMMUNICATIONS, LLC NVG LITTLE ROCK, AR NBC INC NBZ SAN ANTONIO, TX NBD BANK NA NBD DETROIT, MI NCHE TELECOMMUNICATIONS NETWORK INC NCE FAIRFAX, VA NCHE TELEPHONE NHE FAIRFAX, VA NCI COMMUNICATIONS INC NCX LAKEWOOD, NJ NCI DATA.COM, INC. NDM OMARK, WA NCR INTERNATIONAL TELECOMMUNICATIONS SERVICES NIT INC NCR TELECOMMUNICATIONS SERVICES INC (NCR-TSI) NCR NE COLORADO CELLULAR INC DBA CELL. ONE NEB FT MORGAN, CO NORTHEAST COLORADO INC NEBRASKA CENTRAL TELECOM, INC T/A NCTC LONG NGN GIBBON, NE DISTANCE NEBRASKA RADIO TELEPHONE SYSTEMS, INC. NRT LINCOLN, NE NEBRASKA TECHNOLOGY & TELECOMMUNICATIONS, NGT LINCOLN, NE INC. NECHES PAGING INC NHP LUMBERTON, TX NECLEC, LLC NJL HINGHAM, MA NEELY SALES NLY SALT LAKE CY, UT NEHALEM TELEPHONE & TELEGRAPH CO. NLM NEHALEM, OR NELSON MARKETING SYSTEMS NMS BRUNSVILLE, MN NELSON’S ELECTRONICS INC NEO WINNER, SD NEMONT COMMUNICATIONS INC NEU SCOBEY, MT NEON INC NON WALTHAM, MA NEP, LLC NLI WESTBROOK, ME NET COMMUNICATIONS CORP. NUI SAN DIEGO, CA NET LEC, INC. NEN DE PERE, WI NET ONE INTERNATIONAL (PREV CHARITIES NETWORK HRK ORLANDO, FL INTERNATIONAL, INC) NET2000 (PREV NTEL) NTJ GERMANTOWN, MD NET2PHONE NPF NEWARK, NJ NETAMERICA CORP NTA DALLAS, TX NET-CAL NCL LANSING, MI NETCALL INC NEZ LANSING, MI NETCALL/AMSI NSI FLINT, MI NETCARRIER TELECOM, INC. NCV LANSDALE, PA NETCOM ENTERPRISES NEP NET-COM INC GCC JACKSON, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–138 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NETCOM ON-LINE COMMUNICATION SERVICES, INC. NOO SAN JOSE, CA NETCON TELCOM INC NNO CRYSTAL RIVER, FL NETECH COMMUNICATIONS CORP NTH DENVER, CO NETEL NTY FT. LAUDERDALE, FL NETEXPRESS SYSTEMS INC NXP SAN MATEO, CA NETFAX TECHNOLOGIES, INC NFX MIAMI, FL NETGURU, INC. NGU YORBA LINDA, CA NETLINK NLK SEATTLE, WA NETLINX TELECOMMUNICATIONS, CORPORATION NLR MIAMI, FL NETROCELL CELLULAR TEL CO (NAME CHG METROPLEX MTX TELECOM) NETSHARE INC NET NETSOL TECHNOLOGIES, INC. NSG CITY OF INDUSTRY, CA NETSTREAM INC NSY ROSEVILLE, CA NET-TEL GROUP LLC (PREV. NET TEL, INC) NTU RESTON, VA NET-TEL GROUP LLC (PREV. TELESAVER OF NEW ABQ RESTON, VA MEXICO) NETTEL(CODE INVALID) NEL DENVER, CO NETTRONIX, INC. NIX SALT LAKE CITY, UT NETVOICE TECHNOLOGIES INC NHG DALLAS, TX NETWORK ACCESS INC NWA DAVIS, FL NETWORK ACCESS INC. NKA HOLLYWOOD, FL NETWORK ACCESS SOLUTIONS CORP. NAO STERLING, VA NETWORK ACI NOA SEATTLE, WA NETWORK BROKERS INC NBK IRVING, TX NETWORK CARRIER SERVICES NWX NARBERTH, PA NETWORK COMMUNICATIONS NCI NETWORK COMMUNICATIONS NEC NETWORK COMMUNICATIONS INC NCU SEATTLE, WA NETWORK COMMUNICATIONS INC NRK TOMBALL, TX NETWORK COMMUNICATIONS INTERNATIONAL CORP. NCF LONGVIEW, TX NETWORK CONNECTIONS USA, INC. EUA CLEVELAND, OH NETWORK CONSULTANTS INC NKC BUFFALO, NY NETWORK DIMENSIONS INCORPORATED NDN LONG VALLEY, NJ NETWORK ENHANCED TECHNOLOGIES, INC. NEK LOS ANGELES, CA NETWORK FACILITIES INTERNATIONAL NFI DALLAS, TX NETWORK I INC NEI NETWORK MANAGEMENT SERVICES NTM PORTLAND, OR NETWORK MARKETING NMG PLANO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–139 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NETWORK MICROWAVE INC NMW HIGHLAND, CA NETWORK ONE NOE ATLANTA, GA NETWORK ONE, INC. (PREV. FAXJET, INC.) DGD JACKSONVILLE, FL NETWORK OPERATOR SERVICES INC NOS LONGVIEW, TX NETWORK PAGE CORP NGV EASTON, PA NETWORK PAGING, INC. NWG SPRINGDALE, AR NETWORK PLUS INC NPU QUINCY, MA NETWORK RECOVERY SERVICES, INC. NVS HUDSON, WI NETWORK SERVICES INC NSR PORTLAND, OR NETWORK SERVICES LIMITED NSL ASPEN, CO NETWORK SERVICES LONG DISTANCE NSD TREVOSE, PA NETWORK SERVICES, LLC. (PREV NATIONAL PAGING) NPA EL SEGUNDO, CA NETWORK SERVICES, LLC. (PREV TSR WIRELESS LLC) TZB FORT LEE, NJ NETWORK SWITCHING SERVICES INC NSW HOUSTON, TX NETWORK TECHNOLOGIES INC NWH SEBRING, FL NETWORK TELECOM EXCHANGE CORP, DBA NTX NKE EASTON, PA NETWORK TELECOMMUNICATIONS (NETTEL) NTI DENVER, CO NETWORK TELEPHONE CORPORATION NKH PENSACOLA, FL NETWORK TELEPHONE CORPORATION (PREV LWK PENSACOLA, FL LIGHTNETWORKS, INC.) NETWORK TELEPHONE SERVICES INC NWR WOODLAND HILLS, CA NETWORKPLUS NKP FAIRFAX, VA NETWORKTWO COMM. GROUP, INC (PREV AUTOMATIC ADQ ANN ARBOR, MI DATA PROC. AUTONET) NETWORLD CONNECTIONS, INC. NDU SALT LAKE CITY, UT NEUMEDIA NMD BUCKHANNON, WV NEURAL SYSTEMS INC NLS SAN ANTONIO, TX NEVADA BELL NVB RENO, NV NEVADA COUNTY ANSWERING SERVICE NVD GRASS VALLEY, CA NEVADA TELEPHONE, INC. NVL LAS VEGAS, NV NEVADA WIRELESS NVW SPARKS, NV NEW ACCESS COMMUNICATIONS LLC NWF MINNEAPOLIS, MN NEW AMERICAN PHONE COMPANY NAM NEW BRUNSWICK CELLULAR NBC CLARKSBURG, NJ NEW CENTURY COMMUNICATION (PREV CENTURY CFV DALLAS, TX INTERACTIVE FAX, INC) NEW CENTURY DATACOM, INC. NRY GRAND JUNCTION, CO NEW CENTURY TELECOM, INC. NWY MCLEAN, VA NEW CHANNELS - HYPERION TELECOMMUNICATIONS NCY E SYRACUSE, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–140 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NEW CONCEPT COMMUNICATIONS, LLC NNM SANTA BARBARA, CA NEW DIAL INCORPORATED NDP CHICAGO, IL NEW DIMENSIONS INDUSTRIES NDI PHOENIX, AZ NEW EAST TELEPHONY, INC. NEY BELHAVEN, NC NEW EDGE NETWORK, INC (PREV WEST-NET INC) WNI VANCOUVER, WA NEW EDGE NETWORK, INC. NGE VANCOUVER, WA NEW ENGLAND DIGITAL DISTRIBUTION INC NDG BEVERLY, MA NEW ENGLAND MICROWAVE CORP NEM HARTFORD, CN NEW ENGLAND TELEPHONE DISCOUNT SYSTEMS INC NED NORWALK, CT NEW ERA COMMUNICATIONS INC NER ALEXANDRIA, VA NEW FRONTIER TELECOMMUNICATIONS INC NFR HAGERSTOWN, MD NEW GLOBAL TELECOM INC NGB GOLDEN, CO NEW HAMPSHIRE TELEPHONE COMPANY, INC. DBA MCT NHL CONTOOCOOK, NH LONG DISTANCE NEW HOPE TELEPHONE COOPERATIVE LONG DISTANCE, NHV NEW HOPE, AL INC. NEW JERSEY FIBER TECHNOLOGIES NJF PISCATAWAY, NJ NEW JERSEY STATE POLICE NJP WEST TRENTON, NJ NEW JERSEY TELECORP, LTD. NJT SAYREVILLE, NJ NEW MEXICO TELEPHONE EXCHANGE NMT ALBUQUEQUE, NM NEW MILLENNIUM COMMUNICATIONS, CORP NME MIAMI, FL NEW MILLENNIUM TELECOMMUNICATIONS INC NUM CHICAGO, IL NEW NORTH TELECOMMUNICATIONS DBA CITIZENS NNR RHINELANDER, WI LONG DISTANCE NEW ORBIT COMMUNICATIONS, INC. NOD SAN DIEGO, CA NEW ORLEANS TELEPORT INC NOT NEW ORLEANS, LA NEW PAR DBA AIRTOUCH CELLULAR (PREV COLUMBUS CUM COLUMBUS, OH CELL TELEPHONE CO) NEW PAR DBA AIRTOUCH CELLULAR (PREV DETROIT DTC SOUTHFIELD, MI CELLULAR TELE CO) NEW PAR DBA AIRTOUCH CELLULAR (PREV FLINT FNT SOUTHFIELD, MI CELLULAR TELEPHONE CO) NEW PARIS TELEPHONE INC NEA NEW PARIS, IN NEW TELCO, L.P. DBA SPRINT TELECOMMUNICATIONS NEV KANSAS CITY, MO VENTURE NEW TIMES NWM PHOENIX, AZ NEW ULM TELECOM, INC. NUL NEW ULM, MN NEW VALLEY CORP NVY UPPER SADDLE REVER, NJ NEW VECTOR COMMUNICATIONS INC NVC NEW WAVE CELLULAR COMMUNICATIONS NWV PARIS, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–141 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NEW WORLD NETWORK USA INC NUU COCONUT GROVE, FL NEW WORLD PHONE SERVICE, INC. NEE NORRISTOWN, PA NEW YORK ACCESS CORPORATION NYP MIAMI, FL NEW YORK INSTITUTE OF TECHNOLOGY NYI OLD WESTBURY, NY NEW YORK LOCAL TELEPHONE, INC NYE KNOXVILLE, TN NEW YORK LOTTERY GAMES NYL SCHENECTADY, NY NEW YORK RSA 2 CELLULAR PARTNERSHIP NYR CROWN POINT, NY NEW YORK TELECONNECT, INC. NYT HARRISBURG, PA NEW YORK TELSAVE, INC. NYS NEW YORK, NY NEW YORK UNIVERSITY NYU NEW YORK, NY NEW-CELL INC NEW PULASKI, WI NEWCOMM NET, INC. NWB FREDERICK, MD NEWCOMM WIRELESS SERVICES INC NMR GUAYNABO, PR NEWMAN NMN NEWPATH HOLDINGS, INC. NHD DES MOINES, IA NEWROADS TELECOM NRZ FORT SMITH, AR NEWSOUTH COMMUNICATIONS LLC NSC GREENVILLE, SC NEWSOUTH COMMUNICATIONS, LLC NSO GREENVILLE, SC NEWTEL COMMUNICATIONS INC NWU ST JOHNS, NF NEWWAVE COMMUNICATIONS INC NWZ CORNELIUS, NC NEX FONE NXF DALLAS, TX NEXGEN INTEGRATED COMMUNICATIONS, L.C. NXI URBANDALE, IA NEXGEN TELECOMMUNICATIONS, INC. NGC JERSEY CITY, NJ NEXSTAR COMMUNICATIONS INC NXR BOCA RATON, FL NEXT GEN PHONE SYSTEMS, INC. NXY CORVALLIS, OR NEXTEL COMMUNICATIONS NXT SILVER SPRING, MD NEXTEL COMMUNICATIONS,INC (PREV SMART SMR OF SZC RESTON, VA CALIFORNIA INC) NEXTEL PARTNERS OPERATING CORP NLZ KIRKLAND, WA NEXTEL WEST CORP (PREV ONECOMM) ONM DENVER, CO NEXTGEN TELEPHONE, INC. NXG MOUNT SINAI, NY NEXTIRAONE LLC NXN HERNDON, VA NEXTWAVE WIRELESS NXW DALLAS, TX NEXUS COMMUNICATIONS, INC NXU COLUMBUS, OH NEXUS TELECOM NXS BURNABY, BC NFINITY COMMUNICATIONS INC. NFY ALVORD, TX NHT PARTNERSHIP NHR BUFFALO, NY NIACOM COMMUNICATIONS INC NIC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–142 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NIAGARA COMMUNICATIONS INC NCM NIAGARA MOHAWK POWER CORP NMP SYRACUSE, NY NIAGARA TELEPHONE COMPANY NGA NIAGARA, WI NICHEL FONE INC NFN SAN ANTONIO, TX NIELSEN COMMUNICATIONS NSN INMAN, NE NII COMMUNICATIONS, LTD. NIK SAN ANTONIO, TX NITEL CORPORATION NIE DALLAS, TX NJ-PA CORRIDOR CO NPC NLD USA NLU SLOAN, IA NO 1 CELLULAR 1 OCL BARRINGTON, IL NOAH CORP NAH FORT WAYNE, IN NOAH TELECOM, INC. NHI BURBANK, CA NOKIA TELECOMMUNICATIONS INC NOK WESTLAKE, TX NO-MIS COMMUNICATIONS INC NMC NO’MIS COMMUNICATIONS, INC. NOI BROWNSVILLE, TX NOR CAL TELECOM NCT FREEMONT, CA NORARK COMMUNICATIONS, INC. NKI WYNNE, AR NORBRAM GLOBAL INC NGO RICHMOND HILL, ON NORCOM INC. NRO BOCA RATON, FL NORFOLK COUNTY INTERNET, INC NRF FRANKLIN, MA NORIGEN COMMUNICATIONS (PREV NAVITAR NVI TORONTO, ON COMMUNICATIONS INC) NORLIGHT SUB OF MRC TELECOMMUNICATIONS INC NLG MILWAUKEE, WI NORLIGHT TELECOMMUNICATIONS, INC(PREV BEMIDJI BMJ DULUTH, MN LDS) NORLIGHT TELECOMMUNICATIONS, INC(PREV FERGUS FRG DULUTH, MN FALLS LONG DISTANCE) NORLIGHT TELECOMMUNICATIONS, INC(PREV TAD DULUTH, MN TADLOCK’S COMMUNICATIONS) NORSK TELEKOM, L.L.C. NKT SPRING GROVE, MN NORSTAR COMMUNICATIONS INC NRS ORLANDO, FL NORTEL NRL TRAVERSE CITY, MI NORTEL COMMUNICATIONS INC NLC SALT LAKE CITY, UT NORTEX COMMUNICATIONS CO. (PREV NORTH TEXAS NHM MUENSTER, TX COMM. CO.) NORTEX TELCOM, L.L.C. NOX MUENSTER, TX NORTH ALABAMA CELLULAR NAQ ONEONTA, AL NORTH ALABAMA PAGING CO NAP NORTH AMERICA PAGING NRP SANTA ANA, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–143 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NORTH AMERICA TELEPHONE & TELECOMMUNICATIONS NAE CRANFORD, NJ NORTH AMERICAN CELLULAR NRA COEUR D’ALENE, ID NORTH AMERICAN COLLECTION AGENCY, NCG EDGEMONT, PA INCORPORATED NORTH AMERICAN COMMUNICATIONS CONTROL, INC. NRM NEW YORK, NY NORTH AMERICAN COMMUNICATIONS CORP NAI KANSAS CITY, MO NORTH AMERICAN COMMUNICATIONS GROUP NAG KANSAS CITY, MO NORTH AMERICAN DATA SYSTEMS INC. NAB ATLANTIC BEACH, FL NORTH AMERICAN DIGICOM CORPORATION NAD AURORA, CO NORTH AMERICAN GATEWAY, INC. NGW TORONTO, ON NORTH AMERICAN INTELECOM NZI SAN ANTONIO, TX NORTH AMERICAN NETWORK NAN VAN COUVER, BC NORTH AMERICAN SOFTWARE ASSOCIATES, LTD. NSF IUKA, MS NORTH AMERICAN TELECALL NOR NORTH AMERICAN TELECOM NAY WESTBURY, NY NORTH AMERICAN TELECOM INC NAT NORTH AMERICAN TELECOMMUNICATIONS CORP NAA UNIONDALE, NY NORTH AMERICAN TELEPHONE NHT TAMPA, FL NORTH AMERICAN TELEPHONE CO INC NTC NORTH AMERICAN TELEPHONE NETWORK NRN ATLANTA, GA NORTH BY NORTHEASTCOM LLC NBO BEAVERTON, OR NORTH CAROLINA RSA 3 CELLULAR TEL. CO DBA NRU WILKESBORO, NC CAROLINA WEST WIRELESS NORTH CAROLINA TELCOM, L.L.C. NLX ROBBINS, NC NORTH CENTRAL COMMUNICATIONS, INC. NHU LAFAYETTE, IN NORTH COUNTY COMMUNICATIONS CORP NHC LA JOLLA, CA NORTH COUNTY TEL-COMM NOU OCEANSIDE, CA NORTH DAKOTA LONG DISTANCE NDL DEVILS LAKE, ND NORTH DAKOTA NETWORK CO DBA SRT WIRELESS (PREV MMN MINOT, ND SOURIS RIVER TELE) NORTH DAKOTA TELEPHONE COMPANY NDK DEVILS LAKE, ND NORTH LAKE NETWORK SERVICE NKN DALLAS, TX NORTH MISSISSIPPI MOBILPHONE NMM NORTH PENN TELEPHONE CO. NHN PRATTSBURGH, NY NORTH PITTSBURGH TELEPHONE COMPANY NPE GIBSONIA, PA NORTH STATE SYSTEMS INC NSS NORTH STATE TELE. LONG DISTANCE CO DBA N. STATE NST HIGH POINT, NC COM LONG DISTANCE NORTHCOAST COMMUNICATIONS, L.L.C. NHS SYOSSET, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–144 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NORTHEAST CELLULAR TELEPHONE CO., LP NRH GRAY, ME NORTHEAST FLORIDA LONG DISTANCE CO., INC. NEF MACCLENNY, FL NORTHEAST FLORIDA TELEPHONE COMPANY NFT MACCLENMY, FL NORTHEAST LOUISIANA TELEPHONE COMPANY, INC. NUH COLLINSTON, LA NORTHEAST MISSOURI LONG DISTANCE, L.L.C. NMU GREEN CITY, MO NORTHEAST NETWORKS INC NWI WHITE PLAINS, NY NORTHEAST OPTIC NETWORK INC (PREV FIVECOM INC) FVI WESTBOROUGH, MA NORTHEAST PAGING SERVICE NOP ST JOHNSBURY, VT NORTHEAST TELECOM INC DBA NORTHEAST LONG NSE COLLINSTON, LA DISTANCE NORTHEAST TELECOM, INC. NHX COLLINSTON, LA NORTHEAST TELEDISCOUNT INC NDS NORWALK, CT NORTHEAST TELEPHONE CO NRE PULASKI, WI NORTHEAST TELEPHONE LONG DISTANCE, INC. NOL PULASKI, WI NORTHEAST TELEPHONE SERVICE NPV WASHINGTON CROSSING, PA NORTH-EASTERN PENNSYLVANIA TELEPHONE COMPANY NEQ FOREST CITY, PA NORTHERN ARIZONA COMMUNICATIONS CORP NAR FLAGSTAFF, AZ NORTHERN COLORADO COMMUNICATIONS, INC. NZC WIGGINS, CO NORTHERN COMMUNICATIONS L P NZR LOS ALTOS HILLS, CA NORTHERN DOOR COMMUNICATIONS NDC SISTER BAY, WI NORTHERN ILLINOIS CELLULAR COMMUNICATION INC NIL DEKOLB, IL NORTHERN INDIANA RADIOPHONE & PAGING SYSTEMS NIR INC NORTHERN MICHIGAN LDS NML PETOSKEY, MI NORTHERN MONTANA COMMUNICATIONS NMO BIG SANDY, MT NORTHERN NEW MEXICO TELCOM NNX MORA, NM NORTHERN OHIO CELLULAR TELEPHONE NOH CLEVELAND, OH NORTHERN PCS SERVICES, LLC NPM WAITE PARK, MN NORTHERN TELECOM INC NTQ NASHVILLE, TN NORTHERN TELEPHONE & DATA NDT OSHKOSH, WI NORTHERN VALLEY COMMUNICATIONS, L.L.C. NVO BATH, SD NORTHERN WISCONSIN LDS (NETWORK 1 INC) NWD WOODRUFF, WI NORTHLAND NETWORKS NNW UTICA, NY NORTHLAND TELEPHONE SYSTEMS LTD NRD UTICA, NY NORTHPOINT CANADA COMMUNICATIONS INC NPD TORONTO, ON NORTHQUEST TELECOM INC. NQL TORONTO, ON NORTHROP CORP NOC HAWTHORNE, CA NORTHSTAR ACCESS, L.L.C. NSA BIG LAKE, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–145 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NORTHSTAR TECHNOLOGY, LLC(PREV THIRD KY CELL WLH CORBIN, KY DBA WIRELESS 2000) NORTHSTAR TELECOM NSU RSM, CA NORTHSTARR COMMUNICATIONS INC NRR BOULDER, CO NORTHVOICE COMMUNICATIONS INC NVM RICHMOND, BC NORTHWEST CELLULAR NWL TOMAH, WI NORTHWEST COLO RADIO PHONE INC(DBA EGM 1994) NWC NORTHWEST COMMUNITY COMMUNICATIONS, INC. NWE AMERY, WI NORTHWEST FLORIDA MOBILE PHONE NFM NORTHWEST MICROWAVE INC NMV YAKIMA, WA NORTHWEST MISSOURI CELLULAR LIMITED NIS MARYVILLE, MO PARTNERSHIP NORTHWEST NATURAL GAS NNG NORTHWEST NETWORK INC NWN READING, CA NORTHWEST RURAL ELECTRIC COOPERATIVE NUR ORANGE CITY, IA NORTHWEST TELECOM LTD NWT SNOWMASS VL, CO NORTHWEST TELEPHONE, INC. NRI WENATCHEE, WA NORTHWESTEL INC. NWJ WHITEHORSE, CN NORTHWESTERN INDIANA TELEPHONE COMPANY NID HEBRON, IN NORVERGENCE INC NRV NEWARK, NJ NORWAY RURAL TELEPHONE COMPANY NRW KANAWHA, IA NORWEST BANKS NRB MINNEAPOLIS, MN NOS COMMUNICATIONS INC. NOZ BETHESDA, MD NOSOMA SYSTEMS, INC. NSM WEST BERLIN, NJ NOSVA, L.P. AFN LOS ANGELES, CA NOTA BENE NTB PHEONIX, AZ NOVACOM GLOBAL LLC NCB SANTA MONICA, CA NOVACOM SYSTEMS NOV HERRIN, IL NOVACON, LLC. NVU NORTHBROOK, IL NOVAH OF MICHIGAN NVH EAST EINDSOR, CT NOVUS COMMUNICATIONS, INC. NSX SEBRING, FL NOVUS TELECOM INC. NVR VANCOUVER, BC NOW COMMUNICATIONS, INC NOW JACKSON, MS NPI WIRELESS, DIVISION OF NOVERR PUBLISHING, INC. NPW TRAVERSE CITY, MI NPS, INC. NPN CHAMPAIGN, IL NR COMMUNICATIONS NRC NSI COMMUNICATIONS SERVICES, INC. NII LYNDHURST, NJ NSPOF COMMUNICATIONS, INC (PREV GLOBALNET GOB STAFFORD, TX CORPORATION)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–146 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NTC NUD DALLAS, TX NTC INC NCQ LIGHTHOUSE POINT, FL NTC NET LONG DISTANCE INC. NLA NEWPORT, NY NTCH-CA, INC. HCA HERMOSA BEACH, CA NTCH-COLORADO INC NDO GRAND JUNCTION, CO NTCH-ET, INC. ETB HERMOSA BEACH, CA NTCH-IDAHO, INC. NHH POCATELLO, ID NTCH-WEST TENN, INC. NHW HERMOSA BEACH, CA NTCNET TELECOM INC NCD NEWPORT, NY NTE CENTRAL COAST NCA NTE DESERT PHONE INC NTD PALM DESERT, CA NTEGRITY TELECONTENT SERVICES, INC NGI SOUTHFIELD, MI NTELOS NETWORK INC. (PREV CFW NETWORK INC). FWN WAYNESBORO, VA NTERA, INC. NZA MIAMI, FL NTI TELECOM, INC(PREV NET TELECOMMUNICATIONS, NTF LAS VEGAS, NV INC) NTS COMMUNICATIONS (PREV GST TELECOM) ATC LUBBOCK, TX NTS COMMUNICATIONS INC NTS NTS COMMUNICATIONS, INC. (PREV HI-PLAINS NTS HPL PAMPA, TX COMMUNICATIONS INC) NTT INC (INVALID CODE) NIN MILWAUKEE, WI NTTA.COM, INC. NAX NEW YORK, NY NTWS DIGITAL BROADBAND, INC. NDB DECATUR, TX NU TELECOM INC NUO NEWARK, NJ NU WAVE COMMUNICATIONS, INC. NUW HOOD RIVER, OR NUCOMNET, LLC NLL PLEASANTON, CA NUESTRA TELEFONICA NUE NEW YORK, NY NUMBER PLEASE LIMITED NPL NUSHAGAK LONG DISTANCE NKL DILLINGHAM, AK NUSTAR COMMUNICATIONS CORP. NUC MARIETTA, GA NUSTAR TELEPHONE CO. INC. NLH SMYRNA, FL NUTEL COMMUNICATIONS NUA TUCSON, AZ NUTEL COMMUNICATIONS, INC. NUN LANDOVER, MD NUTEL PHONE SERVICE INC NUP NORRISTOWN, PA NWM MANAGEMENT, INC. NMI JACKSON, MS NXGEN NETWORKS, INC. NXE DENVER, CO NY CITY TRANSIT AUTHORITY NYA NEW YORK, NY NY TELENETWORKS INC NYW NEW YORK, NY NYNEX LONG DISTANCE COMPANY NYD NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–147 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location NYNEX LONG DISTANCE COMPANY DBA VERIZON VES NEW YORK, NY ENTERPRISES SOLUTIONS NYNEX MOBILE COMMUNICATIONS COMPANY NYM NY-TEL COMMUNICATIONS INC NYO LAKE SUCCESS, NY NYTEL CORP NEJ LONG ISLAND CITY, NY O K COMMUNICATIONS OKC O L C CO OLC HOUSTON, TX O.N. TEL ONB NORTH BAY, ON O1 COMMUNICATIONS INC OCQ SACREMENTO, CA O1 COMMUNICATIONS, INC (PREV OPTION ONE OPE SACRAMENTO, CA COMMUNICATIONS INC) OAK CELLULAR ASSOCIATES OAK WEST ATLANTIC CITY, NJ OAN SERVICES, INC. (PREV OPERATOR ASSISTANCE OAN NORTHRIDGE, CA NETWORK) OAN SERVICES, INC. (PREV US TELEDATA CORP) UTA NORTHRIDGE, CA OCC COMMUNICATIONS CORP OCZ CEDAR HILL, TX OCC LIMITED OCC BOSTON, MA OCCT OCT OK CITY, OK OCEAN REEF CLUB ORC ODESSA CELLULAR CORP ODS FAIRFIELD, CA ODIN TELEPHONE EXCHANGE, INC ODX ODIN, IL OFF-CAMPUS COMMUNICATIONS OFF OREM, UT OFFICECOMM, INC. OFE AUSTIN, TX OGDEN CHECK APPROVAL NETWORK, INC. OCA VIRGINIA BEACH, VA OGDEN COMMUNICATIONS, INCORPORATED OGC RESTON, VA OGDEN TELEPHONE COMPANY OGD SPENCERPORT, NY OHIO CELLULAR RSA LIMITED PARTNERSHIP OHC FT MYERS, FL OHIO DEPARTMENT OF ADMINISTRATIVE SERVICES OHD COLUMBUS, OH OHIO DIRECT COMMUNICATIONS, INC. OHR MIDVALE, UT OHIO LINX OHL CLEVELAND, OH OHIO MOBILE TELEPHONE CO OMT OHIO RIVER CELLULAR CORPORATION ORV NEW YORK, NY OHIOTELNET.COM, INC. OON NEWARK, OH OK CELLULAR OKK KINGFISHER, OK OKLAHOMA CELLULAR INC OKL BOSTON, MA OKLAHOMA COMMUNICATION SYSTEMS INC OCS OKLAHOMA LONG DISTANCE OLD OKLAHOMA CITY, OK OKLAHOMA RADIO SYSTEM OKR MOORE, OK OKLAHOMA WESTERN TELEPHONE COMPANY OWT CLAYTON, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 8–148 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location OLD HOME OPERATOR OHO DALLAS, TX OLD LAREDO SERVICE OLS LAREDO, TX OLD WEST PAGING AND COMMUNICATIONS OWP REDMOND, UT OLTRONICS INC OLT ORLANDO, FL OLYMPIA LEASING INC OLN PARIS, TX OLYMPIA NET OPN NEW YORK, NY OLYMPIA TELECOM OTI PARIS, TX OLYMPIC COMMUNICATION NETWORK OCN STANWOOD, WA OLYMPIC PAGING CO OYP TACOMA, WA OLYMPIC TELECOMMUNICATIONS, INC.(PREV. MIRAGE IAN SEATTLE, WA MARKETING) OMAHA CELLULAR TELEPHONE CO OMC OMAHA, NE OMC COMMUNICATIONS, INC. OMV BETHESDA, MD OMEGA CELLULAR PARTNERS OEC SALT LAKE CITY, UT OMEGA ELECTRONICS OMG AMARILLO, TX OMEGA NETWORK SERVICE ONS DALLAS, TX OMNETRIX INTERNATIONAL, INC. OXI LOS ANGELES, CA OMNI COMMUNICATIONS INC OCM OMNI COMMUNICATIONS INC OMU PALM BEACH GARDENS, FL OMNI MARKETING & MANAGEMENT CO INC OMI LEESUMMIT, MO OMNI PRISM COMMUNICATIONS INC OMZ ARLINGTON, TX OMNI PRISM COMMUNICATIONS, INC. OPR ARLINGTON, TX OMNICALL OML GREENVILLE, SC OMNICALL COMMUNICATIONS CORP ONI WEST BLOOMFIELD, MI OMNICALL INC ONC SEATTLE, WA OMNICOM OMN OMNICOM PAGING PLUS OIC MISSOULA, MT OMNI-PAGE ONP ANDREWS, TX OMNIPLEX COMMUNICATIONS GROUP, LLC (PREV. USA UXC CHESTERFIELD, MO EXCHANGE, LLC) OMNIPOINT COMMUNICATIONS, INC. OPT WAYNE, NJ OMNITEL COMMUNICATIONS, INC. OTU NORA SPRINGS, IA OMNIWERX OMX ANAHEIM, CA OMNPLEX COMMUNICATIONS GROUP LLC OCG CHESTERFIELD, MO ON US NETWORK OUN KENNEDALE, TX ONA MANUFACTURING INC ONA FRUIT HEIGHTS, UT ONCALL COMMUNICATIONS OF OHIO INC OOH MARION, OH ONCOR COMMUNICATIONS INC ONR BETHESDA, MD ONE CALL COMMUNICATIONS ONE INDIANAPOLIS, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–149 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ONE CLEAR TELECOM OEE LOS ANGELES, CA ONE COMMUNICATIONS SYSTEMS, INC. OYS LONDON, KY ONE EIGHTY COMMUNICATIONS, INC. OEY BILLINGS, MT ONE EIGHTY NETWORKS, INC. OEW SPOKANE, WA ONE EZ CALL, INC OEZ KEYSTONE HEIGHTS, FL ONE SOURCE TELECOMMUNICATIONS INC OSL DUBLIN, CA ONE STOP CELLULAR & PAGING OSP ONTARIO, CA ONE TEL INC. OTE LONG BEACH, CA ONE TOUCH COMMUNICATIONS OTH RALEIGH, NC ONE VOICE COMMUNICATIONS, INC. OVM STERLING, VA ONE WAY COMMUNICATIONS, INC. OWY SOMERS PT, NJ ONE-2-ONE COMMUNICATIONS PRO PHOENIX, AZ ONE-2-ONE COMMUNICATIONS(PREV AMERICAN LDC PHOENIX, AZ TELECOM NETWORK, INC) ONEIDA COUNTY TELEPHONE LONG DISTANCE ODC HOLLAND PATENT, NY ONEIDA NETWORK SERVICES, INC. OEI ONEIDA, IL ONEPOINT SERVICES,L.L.C. OPV PHOENIX, AZ ONESTAR LONG DISTANCE, INC. (PREV. TELSTAR TPD ARBOR VITAE, WI COMMUNICATIONS, INC) ONE-STOP COMMUNICATIONS, INC. OSC HINDSDALE, IL ONESUITE CORPORATION OSQ LOS ANGELES, CA ONETONE TELECOM, INC (PREV TALON AJX SENECA, SC COMMUNICATIONS, INC) ONFIBER CARRIER SERVICES, INC. OFC CUPERTINO, CA ONLINE COMMUNICATIONS INC OLI SANTA CLARA, CA ONQUE COMMUNICATIONS, INC. OQC OKLAHOMA CITY, OK ONSITE ACCESS LOCAL LLC OAL NEW YORK, NY ONSITE ACCESS, INC. OSX NEW YORK, NY ONVOY INC OVY PLYMOUTH, MN ONVOY, INC, PREV (MEANS TELCOM) MEN PLYMOUTH, MN ONVOY, INC. (PREV MEANS COMMUNICATIONS MSK PLYMOUTH, MN CORPORATION) ONVOY, INC. (PREV MEANS TELCOM) POL PLYMOUTH, MN OPEN NETWORKS GLOBAL SERVICES ONG RESTON, VA OPENBAND OF VIRGINIA, INC. OVG CHANTILLY, VA OPENCOM INC OPK AMESS, IA OPENTEL COMMUNICATIONS, INC OPU SANTA CLARA, CA OPERATOR SERVICE COMPANY OSR LUBBOCK, TX OPPENHEIMER AND COMPANY OAC NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–150 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location OPTEL, INC. OPL DALLAS, TX OPTICAL TELEPHONE CORPORATION OHE HUNTSVILLE, AL OPTICALL COMMUNICATIONS SERVICES OPC VICTORVILLE, CA OPTICOM (PREV. ONE CALL COMMUNICATIONS) SVL TERRA HAUTE, IN OPTICOM CORP OPM PITTSBURGH, PA OPTIMUM GLOBAL COMMUNICATIONS, INC. OIM SPRINGFIELD, MA OPTIMUM NETWORK SERVICES, LLC ONV COLORADO SPRINGS, CO ORANGE CITY COMMUNICATIONS, LLP OCY ORANGE CITY, IA ORANGE COUNTY RADIO TELEPHONE OCR OREGON FARMERS MUTUAL LONG DISTANCE, INC. OFM OREGON, MO OREGON MOBILE RADIO INC OMR MEDFORD, OR OREGON PAGING ORP EUGENE, OR OREGON TELECOM INC. ORO SALEM, OR OREGONTEL, LLC ORG MCMINNVILLE, OR ORION TELECOM ORN CUCAMONGA, CA ORION TELECOMMUNICATIONS INC. OTQ BAYSIDE, NY ORIX GLOBAL COMMUNICATION INC OXG LAS VEGAS, NV ORLANDO DIGITAL TELEPHONE CORPORATION ODT ORLANDO, FL ORLANDO TELEPHONE COMPANY ORL ORLANDO, FL OR-TEX OTX LONG BEACH, WA ORWELL TELEPHONE COMPANY ORW ORWELL, OH OSAGE MUNICIPAL COMMUNICATIONS UTILITY OSM OSAGE, IA OTEL TELEKOM, INC. OEK MANCHESTER, NH OTELCO TELECOMMUNICATIONS, LLC (PREV OTELCO & OCW ONEONTA, AL ONEONTA TELE CO) OTTER TAIL CELLULAR TELEPHONE CO OTC BROOKFIELD, WI OTTER TAIL TELCOM OTR FERGUS FALLS, MN OTZ TELECOMMUNICATIONS, INC. OTZ KOTZEBUE, AK OU CONNECTION, INC. OUO ADA, MN OUTERNET CONNECTION STRATEGIES, INC. ONT AUSTIN, TX OUTSIDE CONNECTION, INC. OUT ROCKVILLE CENTRE, NY OVATION COMMUNICATIONS, INC OVT MINNEAPOLIS, MN OVATION COMMUNICATIONS, INC (PREV OCI OCB MINNEAPOLIS, MN COMMUNICATIONS INC) OVERLOOK COMMUNICATIONS INTERNATIONAL, OCI ATLANTA, GA CORPORATION OVERSEAS TELECOMMUNICATIONS INC OTN ALEXANDRIA, VA OWENSBORO MUNICIPAL UTILITIES OOM OWENSBORO, KY OXBORROW TELECOM, INC. OXB MESA, AZ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–151 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location OXFORD COUNTY TELEPHONE AND TELEGRAPH OTT BUCKFIELD, ME COMPANY OXFORD COUNTY TELEPHONE SERVICE COMPANY DBA OXF BUCKFIELD, ME OXFORD NETWORKS OXNARD CELLULAR OXD CITY COMMERCE, CA OZARK MOBILPHONE INC OMP OZARK TELCOM INC OZK SPRINGFIELD, MO OZMAIL INTERLINE OZM JOLIMONT, AU P G PAGING PGZ ST CHARLES, MO P S I PHONE SAVER INSTITUTE PSI W ORANGE, NJ P.V. TEL INC PVL KINGSPORT, TN P.W.I. HOLDINGS, INC. PWI MISSOULA, MT PA RADIO TELE CORP PAR PAC BELL MOBILE COMMUNICATIONS PBL SAN RAMON, CA PAC TEL PAGING PTG DALLAS, TX PACBELL COMMUNICATIONS PBC SAN DIEGO, CA PACE TELECOM, INC. PAU ATLANTA, GA PACENET PCT BEVERLY HL, CA PACIFIC BELL PAB SAN FRANCISCO, CA PACIFIC BELL DEVELOPMENT COMPANY PBE SAN FRANCISCO, CA PACIFIC BELL DIRECTORY PBD SAN FRANCISCO, CA PACIFIC BELL INTERACTIVE MEDIA(PREV ESS ESS PASADENA, CA VENTURES, INC) PACIFIC BELL INTERNET SERVICES PBI SAN RAMON, CA PACIFIC BELL MOBIL SERVICES PFM PLEASANTON, CA PACIFIC CENTREX SERVICES, LLC PNJ NORTH HOLLYWOOD, CA PACIFIC COAST PAGING PIF ESCONDIDO, CA PACIFIC COMLINK INC (PREV. RADIX TECHNOLOGY, INC.) RDX SEATTLE, WA PACIFIC DATAPORT INC PDT ANKORAGE, AK PACIFIC EAST RESEARCH CORPORATION PEH SUMAS, WA PACIFIC GATEWAY EXCHANGE INC PGW BURLINGAME, CA PACIFIC INLAND COMMUNICATIONS INC PIC TUSTIN, CA PACIFIC LIGHTNET, INC. PKF HONOLULU, HI PACIFIC MIDWESTERN INVESTMENT CO PMI PALM DESERT, CA PACIFIC NETWORK COMMUNICATIONS CORP PNC PACIFIC NORTHWEST CELLULAR INC PAZ BELLEVUE, WA PACIFIC NORTHWEST COMMUNICATIONS PNW PACIFIC PAGING INC PPG PACIFIC POWER AND LIGHT PPL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–152 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PACIFIC SOUTH TELECOM, INC. PFH DALLAS, TX PACIFIC TELECOM CABLE INC PCB VANCOUVER, WA PACIFIC TELECOM CELLULAR INC PTE TOMAH, WI PACIFIC TELECOM, INC. PFT VANCOUVER, WA PACIFIC TELECOMMUNICATIONS CORP PFX LOS ANGELES, CA PACIFIC TELEKEY PFY WEST COVINA, CA PACIFIC TELESIS VIDEO SERVICES DBA PACIFIC BELL PBV SAN RAMON, CA VIDEO SERVICES PACIFIC WAVE COMMUNICATIONS PWV MCMINNVILLE, OR PACIFIC WESTERN CONTEL OF SACRAMENTO INC PWC SACRAMENTO, CA PACIFIC WIRELESS PWS SAN FERNANDO, CA PACIFIC WIRELESS SYSTEMS, LLC PWM RICHLAND, WA PACIFICTEL COMMUNICATIONS INC PFQ AJAX, ON PACKET TEL CORPORATION PTK KITCHENER, ON PACKETS PKT RANCHO CORDOVA, CA PACLEC CORPORATION PRJ LEBANON, PA PACNET COMMUNICATIONS PCN AUSTIN, TX PACNET COMMUNICATIONS NORTH PNN PACNET COMMUNICATIONS SOUTH PNS PACNET INC (FORMERLY DIGINET DGN MERCER ISLAND, WA TELECOMMUNICATIONS) PACTEL MOBILE ACCESS PTM COSTA MESS, CA PAC-WEST TELECOMM, INC. DBA AMERICALL (PREV. ARZ STOCKTON, CA AMERICALL CORP.) PAETEC COMMUNICATIONS, INC PUA FAIRPORT, NY PAGE A FONE PAF PAGE ALERT/DIV OF COMMUNICATIONS ALERT INC PAL FORT WAYNE, IN PAGE AMERICA PGA PAGE AMERICA COMMUNICATIONS INC PGC PAGE AMERICA COMMUNICATIONS OF CALIFORNIA INC PGM HACKENSACK, NJ PAGE BOY INC PGB PAGE CLUB NORTHWEST PGU MERCER ISLAND, WA PAGE COMMUNICATIONS PCZ LEAVENWORTH, KS PAGE COMMUNICATIONS, INC. PCQ NEW YORK, NY PAGE EXPRESS, INC. PEX LAWNDALE, CA PAGE FIRST COMMUNICATIONS PFS INGLEWOOD, CA PAGE HAWAII PAH HONOLULU, HI PAGE ILLINOIS INC PIL SPRINGFIELD, IL PAGE N TELL INC PNT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–153 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PAGE NET PGN ANAHEIM, CA PAGE NEW ENGLAND PWG WEST SPRINGFIELD, MA PAGE NEW YORK PYK SCHENECTADY, NY PAGE ONE PGO PORTLAND, OR PAGE ONE OF WYOMING, INC POW CHEYENNE, WY PAGE ONE WIRELESS, INC. PEW FORT COLLINS, CO PAGE PHONE CORP PGP PAGE PLUS PPZ OKLAHOMA CITY, OK PAGE SOUTH - CHARLOTTE PCH CHARLOTTE, NC PAGE TEXAS (FMLY AMERICAN MOBILPHONE PAGING) ANO SAN ANTONIO, TX PAGE1 PGV CHARLESTON, WV PAGEAMERICA OF NEW YORK INC PNY SUNNYSIDE, NY PAGE-A-PHONE PAP PAGECAST INC. PEA GILBERT, PA PAGECELL, INC. PCJ SAN FRANCISCO, CA PAGEDATA PDD BOISE, ID PAGEMART INC PGR DALLAS, TX PAGENET OF DALLAS PDL DALLAS, TX PAGENET OF SAN DIEGO INC PSD SAN DIEGO, CA PAGENET OF TAMPA PNF TAMPA, FL PAGENET PAGING NETWORK OF ILLINOIS INC PLL DURR RIDGE, IL PAGE-PHONE INC PPH PAGEPRO NETWORK PPK LOS ANGELES, CA PAGER & CELLULAR DEPOT PCX HOUSTON, TX PAGER ONE PAO WEST PALM BEACH, FL PAGER ONE PON HONOLULU, HI PAGER PEOPLE PGF BOZEMAN, MT PAGER PROMOTIONS, INC. PPA VENICE, CA PAGER-ONE, INC. DBA TELESPECTRUM PUU DULUTH, MN COMMUNICATIONS OF DULUTH PAGERPLUS PGQ BATESVILLE, AR PAGERS PLUS PPS TUSTIN, CA PAGETEL PAE DETROIT, MI PAGEUSA LOCAL AND NATIONWIDE PAGING PEU DUBLIN, CA PAGEX RADIO PHONE PGX PAGING ASSOCIATES PAG PAGING DIMENSIONS INC PGD ORANGE, CA PAGING INCORPORATED PGG BLACKSBURG, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–154 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PAGING NETWORK OF BURBANK, INC. PBK GLENDALE, CA PAGING NETWORK OF LOS ANGELES INC PLA COMMERCE, CA PAGING NETWORK OF OAKLAND PPO OAKLAND, CA PAGING NETWORK OF OHIO INC PNO PAGING NETWORK OF ONTARIO, INC. PKO ONTARIO, CA PAGING NETWORK OF ORANGE COUNTY, INC. POC ANAHEIM, CA PAGING NETWORK OF PHILADELPHIA PNP W CONSHOHOCKEN, PA PAGING NETWORK OF SACRAMENTO PPW SACRAMENTO, CA PAGING NETWORK OF SAN DIEGO, INC. PDG SAN DIEGO, CA PAGING NETWORK OF SAN JOSE PPJ SAN JOSE, CA PAGING PARTNERS L P PPR FREEHOLD, NJ PAGING PLUS PGI ADA, OK PAGING PLUS PGY AVOCA, PA PAGING PLUS COMMUNICATIONS PPU GLENDALE, CA PAGING SOURCE GROUP LLC POG BELROSE, NY PAGING SOURCE USA, INC. PIU BELLROSE, NY PAGING SYSTEMS INC PSM BURLINGAME, CA PAGING TULSA INC. PLJ TULSA, OK PAGING USA INC PUS INDIANAPOLIS, IN PALM BEACH RADIO PBR PALMER CELLULAR PARTNERSHIP PZP FT MYERS, FL PALMER MUTUAL TELEPHONE COMPANY PMU PALMER, IA PALMERTON LONG DISTANCE DBA BLUE RIDGE BID PALMERTON, PA TELEPHONE PALMERTON TELEPHONE COMPANY PMO PALMERTON, PA PALMETTO RURAL TELEPHONE COOPERATIVE, PWB WALTERBORO, SC INCORPORATED PALMETTONET PLM FLORENCE, SC PAMPA COMMUNICATIONS PCM PAN AM WORLD AIRWAYS PAW NEW YORK, NY PANAM SAT PSF HOMESTEAD, FL PANAM WIRELESS, INC PMW GUAYNABO, PR PAN-ATLANTIC TELECOM, INC. PMY SHAKER HEIGHTS, OH PANDA COMMUNICATIONS INC PAN PITTSBURG, PA PANHANDLE TELECOM SYSTEMS INC PHL GUYMAN, OK PANTEL COMMUNICATIONS, INC. PNU ST. CHARLES, IL PAPOSH LLC PPX WALLINGFORD, CT PARADIGM TELECOM CORP PDM SEATTLE, WA PARADISE COMMUNICATIONS PDS LONGVIEW, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–155 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PARAMOUNT COMMUNICAITONS INC PUM RALEIGH, NC PARAMOUNT MANAGEMENT ASSOCIATES CORP PMA OREM, UT PARCOM COMMUNICATIONS INC POF NORTH PORT, FL PARKER COMMUNICATIONS INC PKR DALLAS, TX PARKER COMMUNICATIONS, INC. (MT) PEZ HELENA, MT PARKER FIBERNET, LLC. PEB SUMMERVILLE, GA PARKER LD PKD WYLE, TX PARKERSBURG CELLULAR TELEPHONE CO PKG PARKERSBURG, WV PARKERSON ELECTRONICS PKS FORT WAYNE, IN PARKINSON ELECTRONICS COMPANY PKN LEVELLAND, TX PARKSIDE NETWORK SERVICE PKW DALLAS, TX PARKWAY COMMUNICATIONS INC PKY PLANO, TX PARKWAY PAGING PRK PLANO, TX PARMER COMMUNICATIONS INC PRR LEVELLAND, TX PARSON MOBILE AND PAGING PMP PARTNER COMMUNICATIONS GROUP, LLC PUG NORTH BRANFORD, CT PARTNERS TELECOM INC PES RICHARDSON, TX PASSPORT TELECOM PPQ NEW YORK, NY PASSWORD INCORPORATED PWD SPOKANE, WA PATH ENTERPRISES INC PHP UNION, NJ PATHFINDER COMMUNICATIONS PAT PATHNET, INC. PAI WASHINGTON, DC PATHWAY COM-TEL, INC. (PREV FIBER WAVE TELECOM, FBW JOSHUA, TX INC.) PATHWAYZ COMMUNICATIONS, INC. PZC AMARILLO, TX PATRIOTCOM INC PTJ HALLANDALE, FL PAT’S MOBILEPHONE INC PMB PATUXENT RIVER NAVAL AIR STATION (NAWCAD) PVV PATUXENT RIVER, MD PAUL BUNYAN RURAL TELEPHONE COOPERATIVE PBU BEMIDJI, MN PAUL VALRO DBA RE-HOOK 1 PVR HUDSON, FL PAXX TELECOM, LLC PAX SCOTTSDALE, AZ PAY PHONE INC PPI PROVIDENCE, RI PAY TELEPHONE THE PYT ENGLEWOOD, NJ PAYLESS LONG DISTANCE, LTD PYC RICHARDSON, TX PAYLESS TELECOM INC. PYQ BELLEVILLE, NJ PAYLINE SYSTEMS INC PLS TUALATIN, OR PAYPHONE MANAGEMENT CORP PYM RICHARDSON, TX PAYPHONE SERVICES, INC PYE CHICAGO, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–156 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PAYPHONE SYSTEM PYS REDDING, CA PAYROLL ADVANCE INC. PAV MOUNTAIN HOME, AR PAY-TEL COMMUNICATIONS INC PAY GREENSBORO, NC PAYTEL OF TEXAS INC PYL DALLAS, TX PBC LONG DISTANCE PBG ARLINGTON, AL PBI INC PBN OKLAHOMA CITY, OK PBT COMMUNICATIONS, INC. PBO GILBERT, SC PC CELLULAR OF KENTUCKY LP PCY PADUCAH, KY PCI COMMUNICATIONS INC PCI AGANA, GU PC-PLUS GMBH PGH MUNICH, GE PCS COMMUNICATIONS CO PCA ALTAMONTE SPS, FL PDGT.COM INC PDX SEATTLE, WA PDQ COMMUNICATIONS SOURCE PDQ KILGORE, TX PDS, INC PDY DALLAS, TX PEACE VALLEY TELEPHONE CO., INC. PVO PEACE VALLEY, MO PEAK COMMUNICATIONS, INC. PEK ORANGE, CA PEAK COMMUNICATIONS, INC. (IL) PKA BELLEVILLE, IL PEARSON/VAIL INC DBA INTEGRATED IGM JONESBORO, AR TELECOMMUNICATIONS SERVICES PEASE & ASSOCIATES PAA PECO HYPERION TELECOMMUNICATIONS PHY PHILADELPHIA, PA PELL-TEL, INC. PEY BLOOMFIELD, NJ PEMBROKE ADVANCED COMMUNICATIONS, INC. PMV PEMBROKE, GA PEMBROKE TELEPHONE COMPANY, INC. PKE PEMBROKE, GA PENCOR SERVICES INC PCR PALMERTON, PA PEND OREILLE TELEPHONE COMPANY PPF GLENNS FERRY, ID PENINSULA COMMUNICATIONS INC PSU TACOMA, WA PENINSULA LONG DISTANCE SERVICE CORP PLD STURGEON BAY, WI PENINSULA RADIO TELEPHONE PER PENN ACCESS CORP PNA PITTSBURGH, PA PENN TELECOM INC PEN GIBSONIA, PA PENNSYLVANIA PAY TELEPHONE PVP ALLENTOWN, PA PENNSYLVANIA TELEPHONE COMPANY PSY JERSEY SHORE, PA PENNY FONE PFN SAN ANTONIO, TX PENSAT INTERNATIONAL COMMUNICATIONS PSQ BETHESDA, MD PENTAGON COMPUTER DATA PCD CICERO, IL PENTHOUSE SUITES, INC. POI IRVING, TX PEOPLES COMMUNICATION INC PIO QUITMAN, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–157 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PEOPLES PHONE CO PPE DARIAN, CO PEOPLE’S RURAL TELEPHONE COOPERATIVE PRV MCKEE, KY CORPORATION PEOPLES TELECOMMUNICATIONS, INC POU QUITMAN, TX PEOPLES TELECOMMUNICATIONS, INC (KS) POK LACYGNE, KS PEOPLES TELEPHONE CO INC (PTC) POP MIAMI, FL PEPCO COMMUNICAITONS L.L.C. PUT WASHINGTON, DC PEPSICO PEP PURCHASE, NY PERRY-SPENCER COMMUNICATIONS, INC. PYR SAINT MEINRAD, IN PERSON TO PERSON TELECOM INC PPT COLORADO SPGS, CO PERSONAL COMMUNICATIONS PSL ALTOONA, PA PERSONAL COMMUNICATIONS NETWORK PUE MELVILLE, NY PERSONAL MOBILE COMMUNICATIONS PARTNERSHIP PMC INCLINE VILLAGE, NV PERSONAL SERVICE COMPANY PVY DALLAS, TX PERSONAL TOUCH COMMUNICATIONS L.P. (PREV CUMBY PUH CUMBY, TX CELLULAR COMM.) PETE’S COMMUNICATIONS, INC. PEC WILLIMAR, MN PETOSKEY MOBILE TELEPHONE PMT KALAMAZOO, MI PETRA COM CORPORATION PET DALLAS, TX PETRICCA COMMUNICATIONS SYSTEMS INC PEI PETRO COMMUNICATIONS INC PTC MIDLAND, TX PETROLEUM COMMUNICATIONS PTR HARAHAN, LA PF.NET COMMUNICATIONS, INC. PFU HERNDON, VA PFIZER INC PZR NEW YORK, NY PHANTOM NETWORKS, INC. PHW FORT LAUDERDALE, FL PHASE 2 PHS CAREFREE, AZ PHILA MOBILE TELEPHONE CO PHM PHILACOM, INC PIA OCEAN RIDGE, FL PHILADELPHIA FIBER OPTIC CORP PFO CHICAGO, IL PHILADELPHIA GAS WORKS PDW PHILADELPHIA, PA PHILADELPHIA NATIONAL BANK PNB PHILADELPHIA, PA PHILLIPS COUNTY TELEPHONE COMPANY PHA HOLYOKE, CO PHOENIX COMMUNICATIONS CO OF GEORGIA INC PCO PHOENIX COMMUNICATIONS GROUP INC PCG FLAGSTAFF, AZ PHOENIX COMMUNICATIONS INC PNX PHOENIX COMMUNICATIONS SOLUTIONS INC PIX W NEW YORK, NJ PHOENIX INTEGRATION, CORP. POX LOS ANGELES, CA PHOENIX LONG DISTANCE, INC. PXL CLAYTON, OK PHOENIX NETWORK PXN SAN FRANCISCO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–158 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PHONE AMERICA OF SOUTH DAKOTA PAM RAPID CITY, SD PHONE CONNECTION PHC JUNEAU, AK PHONE CONNECTION PNH PORTLAND, OR PHONE DEPOT PHD PHONE DEPOTS INC PDP PHONE LANGUAGE INC. PEL CALGARY, CN PHONE MAIL INC PHE GLEN MILLS, PA PHONE NET INC PHN SALEM, OR PHONE RECONNECT OF AMERICA, LLC PVA PORT ST. LUCIE, FL PHONE REMEDIES, LLC. PMX ALLEN, TX PHONE SOLUTION INCORPORATED PHU PORTLAND, OR PHONECOMM USA PEM PHILADELPHIA, PA PHONEIT, INC. PII HOUSTON, TX PHONELINK INC PNL BELLEVUE, WA PHONE-LINK, INC. PHK LAGRANGE, KY PHONEMATE INC PHI PHONEPOWER OF STATE COLLEGE PSC PHONETEL TECHNOLOGIES INC PHT CLEVELAND, OH PHONETIME INTERNATIONAL PTF MISSISSAUGA, ON PHONEXCHANGE INC PXC ALISO VIEJO, CA PHOTOTRONICS INC PHR BALTIMORE, MD PICK COMMUNICATIONS CORP PIK WAYNE, NJ PICUS COMMUNICATIONS, LLC (PREV ATLANTIC AXO VIRGINIA BEACH, VA TELECOM, INC.) PIEDMONT AIRLINES PTA WINSTON-SALEM, NC PIEDMONT COMMUNICATIONS SERVICES, INC. PDU LEXINGTON, NC PIERCE TELEPHONE COMPANY PTB PIERCE, NE PIERRE RADIO PAGING & TEL PRP PILGRIM TELEPHONE INC PLG NEWTONVILLE, MA PINE BELT BROADCASTING, LLC DBA PINE BELT TELE PBB ARLINGTON, AL COMPETIVE SER. PINE MOUNTAIN PNM PINE TELEPHONE COMPANY, INC. PIP BROKEN BOW, OK PINELAND PCS, INC. PED METTER, GA PINNACLE THREE COMMUNICATIONS INC PIN NEW YORK, NY PINNACLES TELEPHONE CO PNI PAICINES, CA PINPOINT COMMUNICATIONS, INC. PIB CAMBRIDGE, NE PINPOINT WIRELESS, INC. PIR CAMBRIDGE, NE PIONEER CELLULAR PNR KINGFISHER, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 8–159 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PIONEER CONSOLIDATED, INC. PSJ PHILOMATH, OR PIONEER LONG DISTANCE PDI KINGFISHER, OK PIONEER LONG DISTANCE PND ULYSSES, KS PIONEER LONG DISTANCE PNG PHILOMATH, OR PIONEER TELECOM(PREV. DWR LONG DISTANCE A DIV OF DYV LANCASTER, WI DICKEYVILLE TEL) PIONEER TELEPHONE COOPERATIVE INC POA KINGFISHER, OK PITTENCRIEFF COMMUNICATIONS, INC. PEF ABILENE, TX PITTSBURG COMMUNICATIONS SYSTEM PCS PITTSBURG, KS PITTSBURGH INTERNATIONAL TELEPORT PIT PITTSBURGH, PA PIZZA HUT INC PZH WICHITA, KS PLAINS COOPERATIVE TELEPHONE ASSOCIATION, INC. PPV JOES, CO PLANET COMMUNICATIONS GROUP(PREV DESTINY DTE PORTLAND, OR TELECOMM INTERNATIONAL) PLANNING RESEARCH CORP PRC PLANT LONG DISTANCE COMPANY PLZ CHULA, GA PLANT TELECOMMUNICATIONS SALES AND SERVICE PTS PLANTERS TELEPHONE LONG DISTANCE, INC. PLW NEWINGTON, GA PLATEAU CELLULAR INC PTU LONGMONT, CO PLATEAU TELECOMMUNICATIONS (PREV EASTERN ETM CLOVIS, NM TELECOMM. SERVICES CO) PLATINUM DEVELOPMENT COMPANY,LLC. PDV MONTEREY, CA PLATTE VALLEY COMMUNICATIONS PVC GRAND ISLAND, NE PLAZA S-L INC. PLN MCALLEN, TX PLDT (US) LTD PUD DOVER, DE PLEASANT TELEPHONE ANSWERING SERVICE INC PSN MT PLEASANT, MI PLEXNET PLX MIDLAND, TX PLEXSYS INTERNATIONAL PXI HERNDON, VA PLG NORTH, INC. PZO CAMBRIDGE, MA PLUS CELLULAR CORP PLU MILWAUKEE, WI PM TELECOMMUNICATIONS, LLC PMF ARLINGTON, TX PNC INC PNZ VERONA, IL PNG TELECOMMUNICATIONS, INC DBA POWERNET PGJ WEST CHESTER, OH GLOBAL COMMUNICATIONS PNI TECHNOLOGIES INC (PREV. PREFERRED NETWORKS, PFR NORCROSS, GA INC.) POCKET COMMUNICATIONS, INC(PREV DCR DDR WASHINGTON, DC COMMUNICATIONS,INC) POCKET PHONE BROADCAST SERVICE INC PPB POCONO LEHIGH PAGING, INC. PLF BANGOR, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–160 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location POCONO MOBILE RADIO TELE CO INC PML POINT BTA 371 LLC PBA SANTA MONICA, CA POINT BTA 79 LLC PBW SANTA MONICA, CA POINT COMMUNICATIONS CO PCU ALBANY, OR POINTE COMMUNICATIONS CORPORATION POZ ROSWELL, GA POINTE COMMUNICATIONS CORPORATION (PREV HTC HTU EL MONTE, CA COMMUN., LLC) POINTECOM, INC (PREV INTERNATIONAL DIGITAL TELE IDG MIAMI, FL SYSTEMS) POKA LAMBRO COMMUNICATIONS PLO TAHOKA, TX POKA LAMBRO PCS, INC. PKM LUBBOCK, TX POKA LAMBRO TELECOMM., INC. DBA POKA LAMBRO PKU TAHOKA, TX TELEPHONE COMPANY POLAR COMMUNICATIONS CORP PLR OLD BRIDGE, NJ POLAR TELCOM, INC. PLQ PARK RIVER, ND POLARIS COMMUNICATIONS AND NETWORKING PMZ LOS ANGELES, CA TECHNOLOGIES IBC POLLOCK LD SERVICE PKL DALLAS, TX PONDEROSA CABLEVISION DBA PONDEROSA LONG PLY O’NEALS, CA DISTANCE PONDEROSA TELEPHONE CO (THE) PDR O’NEALS, CA POPP TELCOM (PREV. LDB CORP) LDB MINNEAPOLIS, MN PORT CITY COMMUNICATIONS PCC PORT HURON, MI PORTA-PHONE PNE MACON, GA PORT-A-PHONE POR PORTERVILLE TELECOM PLT FRESNO, CA PORTLAND CITY EMERGENCY COMMUNICATIONS PCE PORTLAND GENERAL ELECTRIC CO PGE PORTLAND MARINE RADIO PMR PORTLAND PAGING COMPANY PPC PORTSMOUTH MOBILE TELEPHONE SERVICE PZM PORTSMOUTH, OH POUGHKEEPSIE RADIO INC PRD POWER PAGE, LLC PWP INGLEWOOD, CA POWERCOM CORPORATION (PREV TCC TGN BEAVER DAM, WI COMMUNICATIONS INC ) POWERCOM ENERGY AND COMMUNICATIONS ACCESS, PWY LOS ANGELES, CA INC. POWERNET, INC. PWN RENO, NV POWERTEL,INC PWR WEST POINT, GA POWERTELNET COMMUNICATIONS INC PWO PROSSER, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–161 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PPL TELCOM, LLC. PXM ALLENTOWN, PA PRAIRELINK PLK LINCOLN, NE PRAIRIE GROVE TELEPHONE COMPANY PVH PRAIRIE GROVE, AR PREBON MONEY BROKERS INC PBM NEW YORK, NY PRE-CELL SOLUTIONS, INC. PQS MELBOURNE, FL PRECONNECTION, INC. PEJ ELIZABETH, NJ PREFERRED CARRIER SERVICES, INC. PFV HURST, TX PREFERRED NETWORK SOLUTIONS, INC. PDK PLAINVIEW, NY PREFERRED PAGING, INC. PFG EVERETT, MA PREFERRED TELECOM, INC. PTQ DALLAS, TX PREMIER COMMUNICATIONS DBA KTS PREMIER PUI CHICAGO, IL COMMUNICATIONS PREMIER COMMUNICATIONS, INC. PEE SIOUX CENTER, IA PREMIER LONG DISTANCE SERVOCES INC PIE DUNCANVILLE, TX PREMIER NETWORK SERVICES INC PRN DALLAS, TX PREMIER PAGING, INC PEG CANTON, NY PREMIERE COMMUNICATIONS, INC. PME ATLANTA, GA PREMIERE NETWORK SERVICES, INC. PNV DE SOTO, TX PREMIERE PAGE PRE CHAMPAIGN, IL PREMIERE TECHNOLOGIES PMH ATLANTA, GA PREMIERE TELECOMMUNICATIONS INC PTL PREMIERE TELEMEDIA INC PMM EL MONTE, CA PREPAID CELLULAR SERVICES, LLC PPD ATLANTA, GA PREPAID CELLULAR, INC PDO ROCHESTER, NY PRE-PAID LOCAL ACCESS PHONE SERVICE CO. PRA SOUTH HOLLAND, IL PRE-PAID PHONES, LTD PAD LAS VEGAS, NV PREPAID TEL.COM INC. PDE CONCORD, CA PREPAID TELECOM, INC. (GA) PDN ATLANTA, GA PRE-PAY U.S.A. INC. PPY EAST NORTHPORT, BR PRESTIGE HOUSE PRH PRESTO TELECOMMUNICATIONS, INC. PUO SAN DIEGO, CA PRESTON ENTERPRISE, INC (PREV. THE PRESTON PSH PRESTON, IA TELEPHONE COMPANY) PRESTWOOD COMMUNICATIONS COMPANY PTD PREXAR, LLC PXR ELLSWORTH, ME PRICE COMMUNICATIONS WIRELESS, INC. PWL DOTHAN, AL PRICE COUNTY INFORMATION SYSTEMS, INC. PYI PHILLIPS, WI PRICELLULAR WIRELESS CORPORATION PCW NEW YORK, NY PRIME AXXESS (PREV CONNNET PACKET) CXN MERIDEN, CT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–162 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PRIME CONNECTIONS, INC. PMS WAKEFIELD, MA PRIME LINE COMMUNICATIONS, INC DBA PRIME LINK PLE COLUMBIA, MO LONG DISTANCE, INC PRIME SERVICES GROUP, INC. PSG LIVERMORE, CA PRIME TIME COMMUNICATIONS INC PRI RACINE, WI PRIMECO PERSONAL COMMUNICATIONS,L.P.(PREV. PCS PPM WESTLAKE, TX PRIMECO) PRIMELINK, INC (PREV CHAMPNET COMMUNICATIONS, HAC CHAMPLAIN, NY INC PRIMETEL COMMUNICATIONS, INC. PRQ PHILADELPHIA, PA PRIMUS TELECOMMUNICATIONS CANADA (PREV CAM- CVC VANCOUVER, BC NET COMM INC) PRIMUS TELECOMMUNICATIONS, INC. PST MCLEAN, VA PRIORITY COMMUNICATIONS INTERNATIONAL, INC. DBA PIM LAPEER, MI PRICOMM PRIORITY COMMUNICATIONS, INC. POY BOCA RATON, FL PRIORITY ONE PLUS LONG DISTANCE PRY ONTARIO, CA PRIORITY PAGING, INC PYA JACKSONVILLE, FL PRIORITYONE TELECOMMUNICATIONS, INC. PYO LA GRANDE, OR PRISM COMMUNICATION SERVICES, INC (PREV TFQ EDISON, NJ TRANSWIRE COMMUNICATIONS) PRIVATE TRANSATLANTIC TELECOMMUNICATIONS SYS PVT MC LEAN, VA INC PRO TEL COMMUNICATIONS INC POT BIRMINGHAM, AL PROCESS CONTROL DIVISION PRS WALTHAM, MA PROCOM COMMUNICATIONS, INC. POO DALLAS, TX PROCOM INC PRM OAKLAND, MD PROCOM INTERNATIONAL LIMITED PID CICERO, IL PROCOMM PAGING PCP PROCOMM, INC. PRW VALPARAISO, IN PROFESSIONAL ANSWERING SERVICE INC PAS PROFESSIONAL BUREAU INC PFB PROFESSIONAL COMMUNICATIONS INC PFC PROFESSIONAL COMMUNICATIONS INC PFL PROFESSIONAL COMMUNICATIONS MANAGEMENT INC PLC BAXTER, MN PROFESSIONAL FUSION ENTERPRISES, INC(PREV FBU FOUNTAIN VALLEY, CA FLEABUSTERS) PROFESSIONAL MESSAGING SERVICES INC PMN ERIE, PA PROFESSIONAL TELEPHONE ANSWERING SERVICE INC PFE AUSTIN, TX PROFESSIONAL TRANSMISSIONS INC PTI SPRING, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–163 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PROGRESS TELECOMMUNICATIONS CORP PUN ST. PETERSBURG, FL PROGRESSIVE CASUALTY INSURANCE COMPANY POV MAYFIELD VILLAGE, OH PROGRESSIVE CONCEPTS INC PRG FORT WORTH, TX PROGRESSIVE HOLDING POH RENTZ, GA PROGRESSIVE NATIONAL TELEPHONE COMPANY (PREV AGG FORT WORTH, TX APPLEGATE) PROGRESSIVE PAGING PSS BOISE, ID PROGRESSIVE RURAL TELEPHONE COOPERATIVE, INC PVU RENTZ, GA PROJECT MUTUAL TELEPHONE COOPERATIVE PJM RUPERT, ID ASSOCATION, INC. PRO-LIFE NETWORK, L.L.C. PFK SCOTTSDALE, AZ PROMO LINE INC. POE DIX HILLS, NY PROMPT CALL ANSWERING SERVICE POM SAN ANTONIO, TX PRONET MEDICAL PMD HAYWARD, CA PRONET, INC. PNQ LAKE SUCCESS, NY PRONTO PTO WESTMOUNT, PQ PRONTO CHECK CASHING, INC. PKC LUBBOCK, TX PRONTO COM MARKETING, INC. PMK COSTA MESA, CA PRONTO DELAWARE CORP PDA PITTSBURGH, PA PROPHONE COMMUNICATIONS INC PRZ MUSKEGON, MI PROSPECT COMMUNICATIONS PSP PROSPEED.NET, INC (PREV COMPLETE BUSINESS OBS TYNGABORO, MA SYSTEMS, INC) PROTECTOWIRE PACIFIC PTP PROTEL INC PTZ LAKELAND, FL PROVIS BROADBAND TEXAS, LLC PVB HOUSTON, TX PRTCOMMUNICATIONS, LLC PXS LAURENS, SC PRUDENTIAL BACHE SECURITIES PBS BOSTON, MA PSA INC PSA DAYTONA BEACH, FL PSINET INC PSK HERNDON, VA PSP MARKETING GROUP INC PMG JACKSON, MS PT&T TELECOM, INC PTW OAKLAND, CA PT-1 COMMUNICATIONS INC (PREV. PHONETIME INC) PHO FLUSHING, NY PUBLIC COMMUNICATIONS ASSOCIATES LTD INC PUC MCKEE CITY, NJ PUBLIC INTEREST NETWORK SERVICES, INC. PIW NEW YORK, NY PUBLIC PHONE PUP EGG HARBOR TOWNSHIP, NJ PUBLIC SERVICE CELLULAR INC PSR COLUMBUS, GA PUBLIC SERVICE CO OF NEW MEXICO PSV ALBERQUERQUE, NM PUBLIC SERVICE ELECTRIC & GAS PSE NEWARK, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–164 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location PUBLIC SERVICE TELEPHONE COMPANY PLV REYNOLDS, GA PUBLIC SWITCH CORP PSW WOODSIDE, NY PUBLIC TELEPHONE CORPORATION PBP NORWOOD, NJ PUBLIC TELEPHONE NETWORK INC PTN MIAMI, MI PUBLIC TELEPHONE, INC. PBT MONSEY, NY PUBLIX NETWORK CORPORATION PUX NORTH HAVEN, CT PUCCNI VOICE PCV KENNEDALE, TX PUEBLO TELEPHONE SECRETARIAL SERVICE PUB PUERTO RICO TELECOM PRL SAN JUAN, PR PUGET SOUND BANK PSB SEATTLE, WA PUGET SOUND POWER AND LIGHT PGT PULASKI WHITE COMMUNICATIONS, INC. PWH STAR CITY, IN PV TEL ENTERPRISES INC PVI MYRTLE BEACH, SC PV TELECOM, INC PVE KINSPORT, TN PVT NETWORKS, INC. PVN ARTESIA, NM PVT WIRELESS LIMITED PARTNERSHIP PVW ARTESIA, NM PYMATUNING INDEPENDENT TELEPHONE COMPANY PYN GREENVILLE, PA Q M C PAGING QMC QAI CAPITAL CENTRE QAI ST. PAUL, MN QAI, INC. QCA IRVINE, CA QCC INCORPORATED QCC OVERLAND PARK, KS QRATINGS INC QRI NEW YORK, NY QST COMMUNICATIONS INC. QSC PEORIA, IL QTEL, INC. QTL DALLAS, TX QUAD INTERNATIONAL COMMUNICATIONS QIC MOORPARK, CA CORPORATION QUADRA PIPE AND SERVICE INC QPS LONG VIEW, TX QUALCOMM INC QLC SAN DIEGO, CA QUALITY COMMUNICATIONS COMPANY QLT GARLAND, TX QUALITY TELEPHONE INC QYT MESA, AZ QUALSTAR COMMUNICATIONS, INC. QSA DEFIANCE, OH QUANTREX COMMUNICATIONS, INC. QTX VIRGINIA BEACH, VA QUANTUM COMMUNICATIONS GROUP INC QUN MINNEAPOLIS, MN QUANTUM COMPUTER SERVICES INC QTM VIENNA, VA QUANTUM TELECOMMUNICATIONS, INC. QTU MANCHESTER, MD QUEBEC-TELEPHONE QBC RIMOUSKI, PQ QUEST COMMUNICATIONS CORP QST LAUDERDALE-BY-THE-SEA, FL QUESTAR INFOCOMM, INC. (PREV. QUESTAR SERVICE QLD SALT LAKE CITY, UT CORPORATION)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–165 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location QUESTAR MICROSYSTEMS INCORPORATED QMS WOODINVILLE, WA QUESTAR RADIO COMMUNICATIONS QRC SANTA MARIA, CA QUICK COMMUNICATIONS, INC. QUK CLARKSTON, MI QUICK COMMUNICATIONS, INC. (MS) QUS MERIDIAN, MS QUICK CONNECT TELEPHONE SERVICE, INC. QTC MURRELLS INLET, SC QUICK TEL QTK BROOKLYN, NY QUICKPIC QCK PELL CITY, AL QUICK-TEL COMMUNICATIONS, INC. QUI BOYD, TX QUORUM COMMUNICATIONS INC QRN MORRISTOWN, NJ QUOTRON SYSTEMS INC QTS LOS ANGELES, CA QUSORON SYSTEMS INC QSI NEW ORLEANS, LA QWEST COMMUNICATIONS CORP (PREV DIGITAL SIGNAL DGL DENVER, CO INC) QWEST COMMUNICATIONS CORP (PREV SOUTHERN SPA DENVER, CO PACIFIC TELECOM) QWEST COMMUNICATIONS INTERNATIONAL INC. (PREV U UWS ENGLEWOOD, CO S WEST, INC) QWEST MICROWAVE CORP QWE R & B COMMUNICATIONS RBM DALEVILLE, VA R & B ENTERPRISE RBE PLANO, TX R & D NETWORK SERVICES, INC RDW MIAMI, FL R & J COMMUNICATIONS CO RJC DICKINSON, ND R A COMMUNICATIONS INC RCN R C S INC RCZ R D THOMPSON AND ASSOCIATES RTA R D & J COMMUNICATIONS MANAGEMENT INC RDJ MYRTLE BEACH, SC R R T OF ASPEN INC RAN R TEX COMMUNICATIONS GROUP, INC. DBA RTEX RXO WHITESBORO, TX COMMUNICATIONS R&B NETWORK, INC. (WHOLLY OWNED SUB OF NTELOS RBN DALEVILLE, VA INC.) R&M COMMUNICATIONS QRM GREENVILLE, TX R.F. COMMUNICATIONS RFM CATAWISSA, PA R.G. DATA INCORPORATED RGD ROCHESTER, NY R.G. SOUND AND COMMUNICATIONS RSC CELINO, OH R.T. COMMUNICATIONS INC. RTO WEATHERFORD, OK R.T.O. COMMUNICATIONS, LLC. RTU NORFOLK, VA RACC ENTERPRISES LLC RNR ALANSON, MI RA-CO COMMUNICATIONS INC RCC BRADLEY, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–166 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location RACO INC RAC RACOM RAZ LA GRANDE, OR RADIO & COMMUNICATION CONSULTANTS, INC. RDM SHREVEPORT, LA RADIO AND ELECTRONIC SERVICE INC RES RADIO BROADCASTING CO RDO RADIO BROADCASTING CO PA RBP RADIO BROADCASTING COMPANY RBC RADIO CALL CO OF VIRGINIA INC RDV RICHMOND, VA RADIO CALL CORP RCP REDONDO BEACH RADIO CALL OF LONG ISLAND INC RLI RADIO CALL-IN RCI RADIO COMMUNICATION COMPANY INC OF WATERLOO RWT WATERLOO, IA RADIO COMMUNICATIONS CENTER RCR JONESBORO, AR RADIO COMMUNICATIONS CO RCM RADIO COMMUNICATIONS COMPANY INC RAI CEDAR RAPIDS, IA RADIO COMMUNICATIONS CONSULTANTS INC RAD RADIO COMMUNICATIONS CORP RCU SCHAUMBURG, IL RADIO COMMUNICATIONS CORPORATION ROC RADIO COMMUNICATIONS INC RDC PRINCE FRED, MD RADIO COMMUNICATIONS OF OHIO ROH MARION, OH RADIO COMMUNICATIONS OF VA INC RCV GLEN ALLEN, VA RADIO COMMUNICATIONS SERVICE RCS PITTSBURY, KS RADIO CONTACT CORP RCT RADIO DISPATCH COMPANY RDP KALAMAZOO, MI RADIO DISPATCH SERVICE RDS RADIO ELECTRONICS INC RDE MIDLAND, TX RADIO ELECTRONICS PRODUCTS CORPORATION REP RADIO EXCHANGE INC REX RADIO PAGE RPE RADIO PAGE COMMUNICATIONS RPG MARLTON, NJ RADIO PAGE OF TACOMA RPT RADIO PAGING RAP RADIO PAGING AND TAS OF CHAROLETT ROT RADIO PAGING INC ROP RADIO PAGING INC (FORT LAUDERDALE) RPF RADIO PAGING OF ASPEN INC RAS ASPEN, CO RADIO PAGING OF ILLINOIS RPI PEORIA, IL RADIO PHONE COMMUNICATIONS RPN BALTIMORE, MD

Proprietary — Licensed Material See proprietary restrictions on title page. 8–167 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location RADIO PHONE INC RPH RADIO RELAY CORP - MO RRM RADIO RELAY CORP - TEXAS RRT RADIO RELAY CORP -OHIO RRO RADIO RELAY CORPORATION RRY WESTCHESTER, IL RADIO SERVICE CO RSV BURLEY, ID RADIO SYSTEMS INC RSY DALLAS, TX RADIO TELEPHONE COMMUNICATION INC RTP RADIO TELEPHONE COMMUNICATION OF DAYTONA RTD RADIO TELEPHONE COMMUNICATION OF GAINESVILLE RTG RADIO TELEPHONE COMMUNICATION OF PANAMA CITY RPC RADIO TELEPHONE COMPANY OF DAYTONA RDY RADIO TELEPHONE COMPANY OF INDIANA INC RTL RADIO TELEPHONE DUPAGE INC RTE GLEN ELLYN, IL RADIO TELEPHONE INC RDT ASHLAND, KY RADIO TELEPHONE SERVICES RTS RADIO WEST RWE LAKE CKELEN, WA RADIOCALL CO RDI RADIOCALL INC RIO RADIOENTERPRISE OF OHIO PEO RADIOFONE RFN RADIOFONE INC RFE RADIOFONO OF GEORGIA INC RFG RADIOPAGE RDG KALISPELL, MT RADIOPHONE OF SEDALIA RPS SEDALIA, MO RADIOTELEPHONE COMPANY OF GAINESVILLE RGV RADIOTELEPHONE OF LOUISIANA RDL RADIOTELEPHONE OF MISSISSIPPI RTM RADIUS TELECOMMUNICATIONS INC RNY HARTFORD, CT RAEX COMMUNICATIONS INC RXC CANTON, OH RAGLAND LONG DISTANCE COMPANY, INC. ROD RAGLAND, AL RAGLAND TELEPHONE COMPANY RGA RAGLAND, AL RAINBOW COMMUNICATIONS RBW PHOENIX, AZ RAINBOW TEL. COOP. ASSN. INC. RWP EVEREST, KS RAINIER CONNECT, INC. (PREV RAINIER CABLE INC) RNC EATONVILLE, WA RAM BROADCASTING INC RBG RAM BROADCASTING OF COLO INC RCO RAM BROADCASTING OF INDIANA INC RBD

Proprietary — Licensed Material See proprietary restrictions on title page. 8–168 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location RAM BROADCASTING OF MICHIGAN INC RMI SOUTHFIELD, MI RAM BROADCASTING OF MO INC RMO RAM BROADCASTING OF NEW MEXICO RNM RAM BROADCASTING OF OREGON RBO RAM BROADCASTING OF TEXAS RBT RAM COMMUNICATIONS RAX SEATTLE, WA RAM COMMUNICATIONS RMC LANSING, MI RAM PAGING HAWAII RAG HONOLULU, HI RAM TECHNOLOGIES INC RMZ ASHLAND, KY RAM TELEMATICS SYSTEMS INC RAM RAM/BSE PAGING CO L.P. RBS PITTSBURGH, PA RAMCELL OF CALIFORNIA RMF LEXINGTON, KY RAMP ELECTRONICS RME RANCH RADIO INC RRD RANDOLPH TELEPHONE TELECOMMUNICATIONS, INC. ROL ASHEBORO, NC RANDOLPH CELLULAR CORP RND CHARLOTTESVILLE, VA RANDOLPH TELEPHONE COMPANY RPL LIBERTY, NC RANDOLPH TELEPHONE MEMBERSHIP CORP RNH ASHEBORO, NC RANGE CORPORATION RNG MARQUETT, MI RANGE TELECOMMUNICATIONS RGE MARQUETTE, MI RANGER CALIFORNIA RGR SAN FRANCISCO, CA RANGER PAGING RAR JOURDANTON, TX RAPID COMMUNICATIONS INC RPD GRAND RAPIDS, MI RAPID COMMUNICATIONS, INC. (NJ) RID MORRISTOWN, NJ RAPID LINK U.S.A., INC. RLK ATLANTA, GA RAPID RADIO SERVICE RDR PALMDALE, CA RAPID SYSTEMS RPM TAMPA, FL RASERCO, INC. RSR EL DORADO, AR RA-TEL COMPANY INC RAE RAYCOMM, INC. DBA KAUA’I PAGING & RAY LIHUE, HI COMMUNICATIONS RAYFIELD COMMUNICATONS RYF SPRINGFIELS, MO RC&A RCW SAN ANTONIO, TX RCA AMERICAN COMMUNICATIONS INC RCA RCA GLOBAL SYSTEMS RGS PRINCETON, NJ RCA NETWORK SERVICES INC RNS RCC ATLANTIC INC RCY ALEXANDRIA, MN RCC HOLDINGS, INC. RHD ALEXANDRIA, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–169 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location RCC NETWORK, INC. RNW ALEXANDRIA, MN RCC OF PA INC RPA RCC OF VIRGINIA RVA RCC PAGING, INC. RGG ALEXANDRIA, MN RCN LONG DISTANCE COMPANY(PREV COMMONWEALTH CWZ DALLAS, PA LONG DISTANCE CO) RCN TELECOM SERVICES OF ILLINOIS INC(PREV 21ST TYO CHICAGO, IL CENTURY TELE IL ) RCN TELECOM SERVICES OF PHILADELPHIA INC. RVP PRINCETON, NJ RCN TELECOM SERVICES, INC(PREV RESIDENTIAL COMM. CEH PRINCETON, NJ NETWORK INC) RCS INC RCQ RCS INC RSX ELK CITY, OK RCX, INC. RXX OREM, UT RDST INC RSD IRVING, TX REA LONG DISTANCE RLG DALLAS, TX REACH COMMUNICATIONS, INC. RHC ALBANY, NY REACH DIRECT, INC. RCD DALLAS, TX READY TELECOM INC RYM ASHEBORO, NC REAL CONNECT REA PORTLAND, OR REAL NAVIGATION SYSTEMS CORP DBA REAL RAL SAN FRANCISCO, CA TELEPHONE COMPANY REAL PUBLIC TELEPHONE CO INC(THE) REL ORLANDO, FL REAL/TIME COMMUNICATIONS RTQ AUSTIN, TX REALIST RLS PHILADELPHIA, PA REAL-TIME SERVICES INC RLT TAMPA, FL REANET CORPORATION RER DURANGO, CO REBL COMMUNICATIONS RBL SANTA ROSA, CA REBOOT INC DBA EAGLE BELL (CA) EBL ANAHEIM, CA REBOUND ENTERPRISES, INC. DBA REI - REI BARTOW, FL COMMUNICATIONS RED FROG, L.L.C. RRZ EMDOND, OK RED WING LDS RWG RED WING, MN REDI-CALL COMMUNICATIONS RED GEORGETOWN, DE REDI-CALL CORP REC REDSTONE NETWORK SERVICES LIMITED RSW BAREHAMWOOD, EN REDUCED ALTERNATIVE TEL SERVICE RDA INCLINE VL, NV REDWOOD LONG DISTANCE RLD REDWOOD FALLS, MN REFLEX COMMUNICATIONS, INC. RFL SEATTLE, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–170 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location REGENCY LONG DISTANCE RGY PLANO, TX REGENT COMMUNICATIONS INC RGT SALT LAKE, UT REGIONAL CABLESYSTEMS INC. RCJ SUDBURY, ON REGIONAL COMMUNICATIONS INC RGL PARAMUS, NJ REGIONET WIRELESS OPERATIONS, LLC RWO NEWPORT BEACH, CA REINBECK MUNICIPAL TELECOMMUNICATIONS UTILITY RMY REINBECK, IA REITZ RENTALS, INC. RZR AUSTIN, TX RELAY COMMUNICATIONS CORP RLC RELERA, INC. RLA DENVER, CO RELIANCE TELECOMMUNICATIONS, INC. RET HAYWARD, CA RELIANT ENERGY COMMUNICATIONS, INC. REG HOUSTON, TX REMI RETAIL COMMUNICATIONS, LLC RRU GREENSBURG, PA RENICK INFORMATION SYSTEMS INC RKI ANAHAIM, CA RENSCHLER COMMUNICATIONS INC RSH WACO, TX REO-CAP INC REO REPUBLIC TELECOM (PREVIOUSLY CCS) RTT REPUBLICAN NATIONAL TELEPHONE COMPANY (PREV FMG DALLAS, TX FLEMING LONG DISTANCE RESERVATION & INFORMATION SYSTEMS RIS ALTA MONTE SPG, FL RESERVATION TELEPHONE COOPERATIVE RVO PARSHALL, ND RESERVE LONG DISTANGE T/A RESERVE RVL RESERVE, LA TELECOMMUNICATIONS RESERVE TELEPHONE COMPANY INC RSO RESERVE, LA RESIDENTIAL COMMUNICATION NETWORK, INC. RCK PRINCETON, NJ RESORT HOSPITALITY SERVICES, LTD RHS HILTON HEAD, SC RESORT TELE-PAGE RST RESOURCE INOVATIONS GROUP, INC. RSI DENTON, TX RESOURCE TECHNOLOGY SERVICES INC RTY MCLEAN, VA RESPONSE TELECOM LP RSP BURLINGTON, VT RETAIL DATA NETWORKS (RDN) RDN ATLANTA, GA RETEL-COM LTD RCL RETEVISION RTV MADRID, SP REVENUE COMMUNICATIONS, INC. RVC ALLEN, TX REVOLUTION COMMUNICATIONS COMPANY, LTD RVU BEACHWOOD, OH REVOLUTION NETWORKS, LLC. (PREV COMMUNITY OSA WINTHRUP, ME SERVICE LONG DISTANCE) REYNOLDS LONG DISTANCE INC REY REYNOLDS, IL RFB CELLULAR INC RFC STAMFORD, CT RG/CB ASSOCIATES RGC LOREDO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–171 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location RGB COMMUNICATIONS, LLC RGX SAN MARTIN, CA RGM COMMUNICATIONS RGM HILLSBORO, NM RHINOS INTERNATIONAL LTD CO RIL GREENVILLE, SC RHYTHMS LINKS INC (PREV ACCELERATED AKJ ENGLEWOOD, CO CONNECTIONS, INC) RICE BELT TELEPHONE COMPANY, INC. RBH WEINER, AR RICHARD F BLYLER RFB RICHLAND-GRANT LONG DISTANCE, INC. RGO BLUE RIVER, WI RICHMOND CELLULAR RMD RICHMOND, VA RICHMOND COMMUNICATIONS CO RIC RICHMOND, IN RICHMOND CONNECTIONS, INC. RHM RICHMOND, MA RICHON INC. DBA PAGE NORTHWEST RIH KALISPELL, MT RIEBE, DAVID S DBA ELECTRONIC ENTERPRISES REE BOISE, ID RIG TELEPHONES INC RIT LAFAYETTE, LA RIGGS COMMUNICATIONS RIG RINGGOLD TELEPHONE CO. RIN RINGGOLD, GA RINGGOLD TELEPHONE LONG DISTANCE, INC. RGN RINGGOLD, GA RINKERS COMMUNICATIONS RNK RIO COMMUNICATIONS, INC. ROS EUGENE, OR RIO MARKETING AND COMMUNICATIONS ROM HARLINGEN, TX RIPTIDE COMMUNICATIONS RPU RICHMOND HILL, ON RISWELL ENTERPRISES INC RWL NEW HYDE PARK, NY RITBRIDGE COMMUNICATIONS, CO. RGI NEW BRUNSWICK, NJ RIVERBEND COMMUNICATIONS RVB FORT WORTH, TX RIVERS ASSOCIATES INC RSA RIVERSIDE LONG DISTANCE OPERATOR RVD AUSTIN, TX RIVERSIDE TELEPHONE CO RVS TULSA, OK RJM COMM RJM CLUTE, TX RKS COMMUNICATIONS RKS FORT WORTH, TX RMR COMMUNICATIONS, LLC RMU DETROIT, MI RNK, INC DBA BUCKET OF MINUTES RNX SHARON, MA ROADRUNNER RADIO PAGING INC RRP ROAMER SERVICES INC RMR LEBANON, NJ ROANOKE & BOTEFOURT TELEPHONE CO RBF DANEVILLE, VA ROANOKE TELEPHONE CO INC ROA MONROE, LA ROANOKE VALLEY CELLULAR TELEPHONE CO RVY HASTINGS, NY ROBERT CEFAIL & ASSOCIATES RCF SAN ANTONIO, TX ROBERT HUEBNER DBA TALK BACK ARKANSAS TBA FORT SMITH, AR

Proprietary — Licensed Material See proprietary restrictions on title page. 8–172 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ROBERT L COYLE, JR RLY HOUSTON, TX ROBERT’S COMMUNICATIONS INC. RBU LITTLE ROCK, AR ROBERTS WIRELESS COMMUNICATIONS, L.L.C. ROW ST. LOUIS, MO ROBO TEL, INC RBI LOMITA, CA ROCHESTER COMMUNICATIONS INC RCH ROCHESTER TEL TELECOMMUNICATIONS GROUP(PREV. TDT CHATHAM, NY TACONIC LONG DIST.) ROCHESTER TELECOMMUNICATIONS SYSTEM RHT ROCHESTER, MN ROCHESTERTEL MOBILE COMMUNICATIONS RMB ROCHESTER, NY ROCK CANYON LD RKY DALLAS, TX ROCK PORT TELEPHONE COMPANY ROY ROCK PORT, MO ROCKEFELLER GROUP TELECOMMUNICATIONS RGP NEW YORK, NY SERVICES INC ROCKFORD COMMUNICATIONS INC RKC ROCKFORD, IL ROCKWELL SIGNAL RWS ROCKY MOUNTAIN BROADBAND, INC. RYB DENVER, CO ROCKY MOUNTAIN COMMUNICATIONS RMT MISSOULA, MT ROCKY MOUNTAIN SYSTEMS RMS ROCKY TOP ENTERPRISE RKT ROGERS CANTEL INC ROG SAINT-LAURENT, WB RONALD ROBINSON DBA PRECISE PAGING & RRG CHICAGO, IL COMMUNICATION CO. ROPIR INDUSTRIES, INC. DBA ROPIR COMMUNICATIONS ROI MONTGOMERY, AL ROSEBUD COTTON COMPANY DBA ROSEBUD TELEPHONE ROE ROSEBUD, TX ROSEVILLE TELEPHONE COMPANY RVT ROSEVILLE, CA ROSEVILLE TELEPHONE COMPANY DBA RCS DIGITAL RIV ROSEVILLE, CA SERVICES ROYAL PAGING RBZ PEORIA, AZ ROYALTEL TELECOMMUNICATIONS BROKERS RTB NIAGARA FALLS, NY ROYCE’S ELECTRONICS, INC. RYE MOAB, UT RRV ENTERPRISES, INC. DBA CONSUMER ACCESS CFU 5120 WOODWAY DRIVE, TX RSL COM CANADA INC RSN VANCOUVER, BC RSL COM U.S.A. (PREV CYBERLINK INTERNATIONAL) CYB WOODLAND HILLS, CA RSL COM U.S.A., INC (PREV WESTINGHOUSE ELECTRIC WIN PITTSBURG, PA CORP COMMUN. SYS) RSL COM USA,INC(PREV INTERNATIONAL IZT VALLEY STREAM, NY TELECOMMUNICATIONS CORP) RTC COMMUNICATIONS CORP ROU ROCHESTER, IN RTI COMMUNICATIONS (PREV ROYAL TELECOM RTR LOS ANGELES, CA INTERNATIONAL)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–173 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location RTK COMMMUNICATIONS RTK EAST ORANGE, NJ RTNT COMMUNICATIONS RTN KENNEDALE, TX RTSC COMMUNICATIONS, INC. RSM LENORA, KS RUBICON TECHNOLOGIES & TELECOMMUNICATION RTH NEW YORK, NY RUBY RANCH INTERNET COOPERATIVE ASSOCIATION RRV DILLON, CO RUDDATA CORPORATION DBA VISION COMMUNICATIONS VSC PADUCAH, KY RULE RADIOPHONE SVC INC RRS RUNESTONE TELEPHONE ASSOCIATION RTF HOFFMAN, MN RURAL CELLULAR COMMUNICATIONS INC RRL LEXINGTON, KY RURAL CELLULAR MANAGEMENT RUL FAIRFIELD, CA RURAL NETWORK SERVICES, INC. RNV MIDVALE, ID RURAL TELEPHONE COMPANY RUH GLENNS FERRY, ID RURALWEST WESTERN RURAL BROADBAND INC RWB SCOTTSDALE, AZ RVP FIBER COMPANY, L.L.C. RVF GRAND RAPIDS, MI RWF COMMUNICATIONS, LLC. RWF YAKIMA, WA RYAN COMMUNICATIONS, INC. RYN DUNCANVILLE, TX S & T COMMUNICATIONS, INC. OUS BREWSTER, KS S L O TELECOM LTD SLO S T MICROWAVE STW W. COXSAKIE, NY S&S COMMUNICATIONS/ALTERNA-CELL AQZ ABERDEEN, SD S.F.C. ENTERPRISES SFC CORAL SPRINGS, FL S.F.M. & T., INC. SFT MIAMI, FL S.N.S. SHARED NETWORK SERVICES INC.(PREV TRANSACT TDJ MISSISSAUGA, ON DATA SERVICES) S4 COMMUNICATIONS CORPORATION SFO INDIANAPOLIS, IN SA.COM INC. SAJ KITCHENER, CN SACO RIVER CELLULAR TELEPHONE COMPANY DBA SLU SACO, ME STARCELLULAR SACO RIVER TELEGRAPH & TELEPHONE CO. SEO BAR MILLS, MN SADDLEBACK COMMUNICATIONS COMPANY SDO SCOTTSDALE, AZ SAFECARD SFD SAFECOM SFM WOODCREST LAKES, NJ SAFEWAY SCAFFOLDS INC SFS SAGE TELECOM, INC. SGZ ALLEN, TX SAGIR INCORPORATED SGR ITHACA, NY SAIL NETWORKS INC. IEW ALPHARETTA, GA SAIPAN CELLULAR & PAGING SUG TUMON, GU SALEM CELLULAR ONE SLL SALEM, NJ SALEM PAGING SLM

Proprietary — Licensed Material See proprietary restrictions on title page. 8–174 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SALISBURY MOBILE TELEPHONE SMT SALISBURY, MD SALT LAKE TEL-A-SYSTEMS SKE SALT LAKE CITY, UT SAM’S DISCOUNT LONG DISTANCE INC. (PREV. TNT TTV KENNEDALE, TX COMMUNICATIONS) SAN CARLOS TELECOM, INC DBA CREATIVE RVI SAN CARLOS, CA INTERCONNECT TELECOM SAN DIEGO TELEPHONE COMPANY SDG SAN DIEGO, CA SAN ISABEL TELECOM, INC. SIO DENVER, CO SAN JUAN LONG DISTANCE SERVICE SJL FRIDAY HARBOR, WA SAN MARCOS LONG DISTANCE INC SML SAN MARCOS, TX SANDELL OPERATOR SERVICE SOS WHITE SETTLEMENT, TX SANDHILL COMMUNICATIONS, LLC SDH JEFFERSON, SC SANDHILLS TELECOMMUNICATIONS GROUP, INC. DBA HGE DAYTONA BEACH, FL SANTEL COMM. SANDSTREAM COMMUNICATIONS & ENTERTAINMENT, SMG CARROLLTON, TX INC SANDWICH ISLES COMMUNICATIONS, INC. SAS HONOLULU, HI SANTA CRUZ CELLULAR TELEPHONE CO SCZ OKLAHOMA CITY, OK SANTA CRUZ RADIO TELEPHONE SCR SANTA ROSA COMMUNICATIONS, INC. SSU VERNON, TX SANTA ROSA TELEPHONE COOPERATIVE, INC. SRJ VERNON, TX SASKTEL SKL REGINA, SK SATCOM SYSTEMS, INC SSQ BOCA RATON, FL SATELLITE BUSINESS SYSTEMS SBS SATELLITE COMMUNICATION SYSTEMS, INC. SMY HAMPTON, VA SATELLITE DATA BROADCAST NETWORKS INC (SATNET) SDB SATELLITE GATEWAY INTERNATIONAL INC SGI NEW YORK, NY SATELLITE PAGING SLP NEW YORK, NY SATELLITE PAGING SLT FAIRFIELD, NJ SATELLITE PAGING STP CULVER CITY, CA SATELLITE SKYPAGER INC SKN INGLEWOOD, CA SATELLITE SYSTEMS CORP SSC SATELLITE TECHNOLOGY INDUSTRIES INC STI BELLEVUE, WA SATELLITE TELEPHONE NETWORK STN SATLINK 3000, INC DBA INDEPENDENT NETWORK IDW BOISE, ID SERVICES INC SATMET SME NEW YORK, NY SAVANNAH INDEPENDENT PCS CORPORATION SAH MACON, GA SAVANNAH RADIO MOBILE TELEPHONE INC SRM

Proprietary — Licensed Material See proprietary restrictions on title page. 8–175 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SAVECOM INTERNATIONAL, USA, INC. SVA HAYWARD, CA SAVEMORE NETWORK SVN RICHARDSON, TX SAVENET SAV SAVERS FEDERAL SAVINGS & LOAN ASSOCIATION SFL LITTLE ROCK, AR SAVERS INC (SUB SAVERS FEDERAL SAVINGS & LOAN) SVS LITTLE ROCK, AR SAVONCALLING.COM LLC SAZ MIAMI, FL SAVONTEL COMMUNICATIONS INC SAQ QUEENS, NY SBA BROADBAND SERVICES, INC. SBH BIRMINGHAM, AL SBC ADVANCED SOLUTIONS, INC. SUV SAN ANTONIO, TX SBC TELECOM, INC (PREV SBC NATIONAL, INC) SBB DALLAS, TX SCANA COMMUNICATIONS, INC. SMI CAYCE, SC SCARSDALE SECURITY SYSTEMS, INC SYY SCARSDALE, NY SCAT COMMUNICATIONS SCN SCATS SCA SCC COMMUNICATIONS CORP SCK BOULDER, CO SCHENECTADY AIR TO GROUND CORP SAG SCHERERS COMMUNICATIONS INC SCG WORTHINGTON, OH SCHOLL INTERESTS., DBA COMMSERV SKV HOUSTON, TX SCHUBERT TELCOM SHT KENNEDALE, TX SCHUYLKILL MOBILEFONE INC SMF SCHYLKILL MOBILE FONE INC SHY POTTSVILLE, PA SCI COMMUNICATIONS INC SCI SCIENCE DYNAMICS CORPORATION SDF CHERRY HILL, NJ SCINDO NETWORKS INC. IDK GREENWOOD VILLAGE, CO SCOTT COMMUNICATIONS INC SCT SCOTT COUNTY LONG DISTANCE, INC. SGD GATE CITY, VA SCOTT, DONALD L. & SHARI L. DBA RADIO ROO ALAMOGORDO, NM COMMUNICATIONS SCS COMMUNICATIONS & SECURITY INC DBA NORTH SSH STAYTON, OR SANTIAM COMMUNICATION SDK ENTERPRISES SDK CHARLOTTE, NC SEAMLESS GEOPORT COMM INC DBA MIDDLEBURGH SGO MIDDLEBURGH, NY TELEPHONE LONG DISTANCE SEARS COMMUNICATIONS NETWORK (INVALID) SEA ARLINGTON HTS, IL SEATTLE CITY LIGHT SCL SEATTLE LONG DISTANCE, INC. SEE BELLEVUE, WA SEAWAY COMMUNICATIONS SEW MONROE, MI SECTOR/SIAC SSI NEW YORK, NY SECURE-FONE AMERICA, INC SFA SAN DIEGO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–176 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SECURITIES INDUSTRY AUTOMATION CORP SIC NY, NY SECURITY ALARM CO SAL OWOSSO, MI SECURITY AND COMMUNICATIONS SUY LEWISTON, ID SEGTEL INC SGU HANOVER, NH SEI DATA, INC. SID DILLSBORO, IN SEIKO COMMUNICATION OF AMERICA(PREV SEIKO SYS BEAVERTON, OR TELECOM. SYSTEMS, INC.) SELECT COMMUNICATIONS INC. SCV DESOTO, TX SELECTIVE PAGING CORP SPG SELECTIVE RADIO PAGING INC SRD SELECTIVE ROYAL CORPORATION SIY CHICAGO, IL SELECTNET INC SLN DALLAS, TX SELECTRONICS CORPORATION SLA WAITSFIELD, VT SELF RADIO, INC. SRI MONTAGUE, TX SEMPRA COMMUNICATIONS EPU SAN DIEGO, CA SENTENEL CALLING INC SCX SAINT CLOUD, MN SEQUEL COMMUNICATIONS, INC. SQL SOUTH PLAINFIELD, NJ SEQUEL SYSTEMS, INC. SQS RICHARDSON, TX SEQUOIA COMMUNICATIONS SQC SEREN INNOVATIONS, INC. SIV MINNEAPOLIS, MN SERVAYA, INC. EAA ASTORIA, NY SERVICE ELECTRIC CABLE T.V., INC. SBI BETHLEHEM, PA SERVICE ELECTRIC TELEPHONE COMPANY SEY COPLAY, PA SERVICES UNLIMITED INC SUN SERVISENSE.COM, INC. SVZ NEWTON, MA SGM ENTERPRISES INC SGE PLANO, TX SHADOW COMMUNICATIONS SDW POMPANO BEACH, FL SHARE COM SHE AUSTIN, TX SHARE LDS SERVICES OF FAIRBAULT SSF FAIRBAULT, MN SHARECOM INC SHA SHARECOM NETWORK CO SMN AUSTIN, TX SHARED COMMUNICATIONS SERVICES, INC SHD SALEM, OR SHARED TELECOM SERVICES SDM INDIANAPOLIS, IN SHARON TELEPHONE COMPANY SHH SHARON, WI SHAW FIBERLINK LIMITED SFK CALGARY, AB SHAWNEE TELEPHONE COMPANY SWW EQUALITY, IL SHAWNEELINK CORPORATION SHK EQUALITY, IL SHAW-ROSE COMMUNICATIONS SRC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–177 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SHEBOYGAN LDS SHB SHEBOYGAN, WI SHELCOMM SHC BALDWIN PARK, CA SHELLSBURG TELECOMMUNICATIONS, INC SUO SHELLEBURG, IA SHENANDOAH LONG DISTANCE CO SHL EDINBURG, VA SHENANDOAH MOBILE CO SHM EDINBURG, VA SHENANDOAH PERSONAL COMMUNICATIONS COMPANY SEH EDINBURG, VA SHENTEL COMMUNICATIONS COMPANY SSA EDINBURG, VA SHENTEL SERVICE CO STS SHERBURNE LONG DISTANCE SBL BIG LAKE, MN SHIP TO SHORE TELEPHONE SHS LOUISVILLE, KY SHIP TO SHORE TELEPHONE CO STL SHO-ME TECHNOLOGIES SMH MARSHFIELD, MO SHORTLINE SYSTEMS, INC. SIM BALTIMORE, MD SHOWALTER, MIKE D. LILLY SAM G DBA BLUE RIDGE SBR HARRISONBURG, VA COMMUNICATIONS SIERRA CELLULAR SIE OAKHURST, CA SIERRA COMMUNICATIONS SER SIERRA COMMUNICATIONS SIA SILVER CITY, NM SIERRA COMMUNICATIONS SRR CORDOVA, CA SIERRA COMMUNICATIONS, INC (SUB OF BACA VALLEY SCJ DES MOINES, NM TEL) SIERRA MOBILE RADIO SMB PORTERVILLE, CA SIERRA PACIFIC COMMUNICATIONS SPB RENO, NV SIERRA TELECOM SRA AUBURN, CA SIERRA TELECOMMUNICATIONS INC SRZ RENO, NV SIERRA TELEPHONE COMPANY, INC. SAE OAKHURST, CA SIERRA TELEPHONE LONG DISTANCE SRH OAKHURST, CA SIGECOM LLC SGL FRANKLIN, MA SIGHT & SOUND/CELLULAR & MORE EMO LAURENS, SC SIGMA CORPORATIONS SGM SIGMA NETWORKS INC. SGQ SAN JOSE, CA SIGNAL ONE PAGING INC SOP SAN DIEGO, CA SIGNATURE NETWORK SKR DALLAS, TX SIGNATURE TELE., INC DBA RANDY WHITE RWH DALLAS, TX TELECOMMUNICATIONS, INC SIGNET PAGING SGP RALEIGH, NC SILKE COMMUNICATIONS SLK SILVER COMMUNICATIONS INTL SVO SAYREVILLE, NJ SILVER LINES COMMUNICATIONS, INC SLX LONG ISLAND CITY, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–178 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SILVER STAR TELEPHONE COMPANY, INC. SSN FREEDOM, WY SILVERADO COMMUNICATIONS SLV SILVERADO COMMUNICATIONS CORP SVD ENGLEWOOD, CO SILVIA LD SVI WYLE, TX SIMPLE COMMUNICATIONS TECHNOLOGIES SOO MIAMI, FL SIMPLY CELLULAR AND TELEPHONE, LLC SYP PORTLAND, OR SIMPLY LONG DISTANCE SPD ST. LOUIS, MO SINCLAIR OIL CORP SIN SALT LAKE CITY, UT SIOUX CITY CELLULAR SERVICE SXC SIOUX CITY, IA SIOUX COMMUNICATIONS SOU SIOUX VALLEY COMMUNICATIONS SVM SIOUX CITY, IA SIOUX VALLEY PAGING INC SVP SIOUXLAND TELECOM SXL ALCESTER, SD SIREN COMMUNICATIONS, INC. SIG SIREN, WI SIRIUS TELECOMMUNICATIONS SIZ SANTA BARBARA, CA SISK COMMUNICATIONS SIK LEVELLAND, TX SISKIYOU COMMUNICATIONS SKI MOUNT SHASTA, CA SISKIYOU COMMUNICATIONS, INC. SYA ETNA, CA SISKIYOU MOBILFONE SSK SANTA ROSA, CA SISKIYOU TELEPHONE CO SYU FORT JONES, CA SI-TECH COMMUNICATIONS INC SIT SK TELINK AMERICA INC SKK FAIR LAWN, NJ SKB TELECOM SKB WATERTOWN, NY SKOWHEGAN ONLINE INCORPORATED SOG SKOWKEGAN, ME SKY ISLAND SERVICES, INC. SYV SAFFORD, AZ SKYBEST COMMUNICATIONS, INC. SBU WEST JEFFERSON, NC SKYCOMM TECHNOLOGIES, INC. SYH HUMBLE, TX SKYLAND TECHNOLOGIES, INC. SKT HELENA, MT SKYLINE COMMUNICATIONS SKY BRYAN, TX SKYLINE TELEPHONE MEMBERSHIP CORPORATION SKP WEST JEFFERSON, NC SKYPHONE INC SPN SKYTEL (DBA SKYPAGER INC) SYT JACKSON, MS SLATER COMMUNICATIONS & ELECTRONICS, INC. SLZ SALEM, OR SLO CELLULAR INC SLI SAN JOSE, CA SLOCUMS ELECTRONICS SEL CORRY, PA SM LONG DISTANCE (SUB SM TELECORP INC) SMD SAN MARCOS, TX SMART BUILDING TECHNOLOGIES LTD SAB ISLANDIA, NY SMART CELLULAR AND COMMUNICATIONS, INC. SCF LAKEWOOD, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 8–179 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SMART CITY TELECOMMUNICATIONS LLC DBA SMART WSK LAKE BUENA VISTA, FL CITY TELECOM SMART COMMUNICATIONS, INC. SMU ROCHESTER, NY SMARTBEEP INC SBE CHEASAPEAKE, VA SMARTCOM TELEPHONE, LLC SMO MCALLEN, TX SMARTCOMM CORP SJM MIAMI, FL SMARTEL SRE NEW YORK, NY SMARTICOM, INC. SMJ NEW YORK, NY SMARTLINE SYSTEMS INC SSY ALEXANDRIA, VA SMITH BAGLEY INC SBG ROSWELL, GA SMITHVILLE TELECOM, INC SHV ELLETTSVILLE, IN SMITHVILLE TELEPHONE COMPANY, INC. SMV ELLETTSVILLE, IN SMR NETWORK SMM PORTLAND, OR SMR SYSTEMS SMZ HOUSTON, TX SNA TELECOM, INC. SYX LOUISVILLE, CO SNAKE RIVER WIRELESS SKW FRUITLAND, ID SNAPPY PHONE OF TEXAS, INC. SXA SHREVEPORT, LA SNC/UNAT LLC SNF ANCHORAGE, AK SNET AMERICA, INC. SNM NORTH HAVEN, CT SNET CELLULAR, INC SUF ROCKY HILL, CT SNET PAGING INC SNP NEW HAVEN, CT SNG COMMUNICATIONS, LLC SGX MOLINE, IL SNIDER TELECOM SND LITTLE ROCK, AR SNIP LINK, LLC SPK BLACKWOOD, NJ SOFLO INTERNET SERVICES, CORP. SII MIAMI, FL SOFTALK INC SOF TORONTO, ON SOFTWARE AMERICA, INC. SWA MONTEREY, CA SOGETEL, INC. SEZ QUEBEC, CN SOLAR TURBINE INC SRT SAN DIEGO, CA SONIC COMMUNICATIONS INC SNU ROSWELL, GA SONICRAF INC SRF CHICAGO, IL SONOMA COMMUNICATIONS SON SONOMA COMMUNICATIONS INC SNO SANTA ROSA, CA SONORA TELECOM SAT FRESNO, CA SORBUS SRB FRAZER, PA SORENSON TELECOMMUNICATIONS STM SOUND CHOICE COMMUNICATIONS, LLC OUL ST. PAUL, MN SOUND COMMUNICATIONS SOUTH SCS REDMOND, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–180 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SOUND COMMUNICATIONS WEST SCW BELLEVUE, WA SOUND ELEVATOR CO SEV KIRKLAND, WA SOUND INVESTMENTS UNLIMITED, INCORPORATED SUI RIO GRANDE CITY, TX SOURCE ONE COMMUNICATIONS, INC. SOY TALLAHASSEE, FL SOURCEONE WIRELESS SQW SCHAUMBURG, IL SOURIS RIVER TELECOMMUNICATIONS CO SRV MINOT, ND SOUTH ARKANSAS TELEPHONE COMPANY INC SKO HAMPTON, AR SOUTH BAY COMMUNICATIONS SBY CARSON, CA SOUTH CANAAN CELLULAR COMMUNICATIONS OCJ FORT MEYERS, FL COMPANY, LP SOUTH CANAAN LONG DISTANCE CO SCD SOUTH CANAAN, PA SOUTH CANAAN TELEPHONE COMPANY SOA SOUTH CANAAN, PA SOUTH CAROLINA NET INC SNZ KINGSTREE, SC SOUTH CAROLINA PHONE LLC SLH GREENVILLE, SC SOUTH CENTRAL LONG DISTANCE, INC. SDA MEDICINE LODGE, KS SOUTH CENTRAL TELCOM, LLC OUE GLASGOW, KY SOUTH CENTRAL UTAH TELEPHONE ASSOCIATION SEU ESCALANTE, UT SOUTH CENTRAL WIRELESS, INC. SAW MEDICINE LODGE, KS SOUTH DAKOTA 7 CORPORATION SDS NEW YORK, NY SOUTH DAKOTA NETWORK INC SDT SIOUX FALLS, SD SOUTH GEORGIA COMMUNICATIONS SGC SOUTH GEORGIA PRE-PAID TELEPHONE COMPANY, INC. SGK BAINBRIDGE, GA SOUTH JERSEY COMMUNICATION SJC SOUTH PAC TRANS CO SPT SOUTH PLAINS COMMUNICATIONS SPI LUBBOCK, TX SOUTH PLAINS ELECTRIC COOPERATIVE, INC. SHR LUBBOCK, TX SOUTH SHORE RADIO TELEPHONE INC SSR MICHIGANCITY, IN SOUTH SLOPE COOPERATIVE TELEPHONE COMPANY, SSO NORWAY, IA INC. SOUTH TEL INC THX THOMASTON, GA SOUTH TEXAS COMMUNICATIONS SXM SAN BENITO, TX SOUTH TEXAS PAGING, INC. SXP DALLAS, TX SOUTHEAST COMMUNICATIONS SEC SOUTHEAST INDIANA CELLULAR TELCO SEI BATESVILLE, IN SOUTHEAST MOBILITY SEB WINNFIELD, AL SOUTHEAST MOBILPHONE INC SEM SOUTHEAST SWITCH INC SES MAITLAND, FL SOUTHEAST TELEPHONE LIMITED PARTNERSHIP, LTD. SEQ PIKEVILLE, KY SOUTHEASTERN CELLULAR SOT MILLRU, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–181 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SOUTHEASTERN INDIANA RURAL TELEPHONE SIH DILLSBORO, IN COOPERATIVE, INC. SOUTHEASTERN NETWORK SERVICES, LLC SEN NASHVILLE, TN SOUTHEASTERN SERVICES, INC. SEF MACCLENNY, FL SOUTHERN CALIFORNIA EDISON COMPANY SED ROSEMEAD, CA SOUTHERN COMMUNICATIONS INC DBA MOBIE PHONE SCM OF TYLER SOUTHERN COMMUNICATIONS SERVICES, INC SOV BIRMINGHAM, AL SOUTHERN EAGLE ACQUISITIONS INC SEG TAMPA, FL SOUTHERN HIGHLANDS COMMUNICATIONS INC SHG BLUEFIELD, WV SOUTHERN KANSAS TELEPHONE CO., INC. SKA CLEARWATER, KS SOUTHERN MESSAGE SERVICE SMS SOUTHERN NEW ENGLAND TELEPHONE (SNET) SNG NEW HAVEN, CT SOUTHERN OHIO COMMUNICATIONS INC SOH WAVERLY, OH SOUTHERN OREGON LD SOL SALEM, OR SOUTHERN PACIFIC TRANSPORTATION CO SPF SAN FRANCISCO, CA SOUTHERN RADIO-PHONE INC SNR SOUTHERN RECONNECT, INC OUR MOBILE, AL SOUTHERN STATES TELEPHONE INC SST SOUTHERN TELCOM NETWORK INC SWK MTN HOME, AR SOUTHERN TELECOM, INC. OHT ATLANTA, GA SOUTHERN TELECOMMUNICATIONS COMPANY, LLC SUK JACKSON, MS SOUTHERNNET SYSTEMS SNS ATLANTA, GA SOUTHLAND CABLEVISION SCB REDLAND, CA SOUTHLAND FIBERNET INC SFN ATMORE, AL SOUTHLAND OF MISSISSIPPI SOM JACKSON, MS SOUTHNET CORP SUH TAMPA, FL SOUTHTEL CORP SZU SAN ANTONIO, TX SOUTHWEST ARKANSAS TEL. COOP. INC. SKU TEXARKANA, AR SOUTHWEST COINTEL COMMUNICATIONS SWE ABILENE, TX SOUTHWEST COMMUNICATIONS SWC SOUTHWEST COMMUNICATIONS SWT SOUTHWEST COMMUNICATIONS CORP SCU SOUTHWEST INTERCONNECT SWI SOUTHWEST MICRONET INC SWR HOUSTON, TX SOUTHWEST MOBILE SWM SOUTHWEST NET CORPORATION SWN ABILENE, TX SOUTHWEST PAGING, CORPORATION SGG HOUSTON, TX SOUTHWEST PCS, LP SWQ OKLAHOMA CITY, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 8–182 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SOUTHWEST RADIO PAGING, INC. SWD RICHLANDS, VA SOUTHWEST TEXAS LONG DISTANCE COMPANY (PREV SWX ROCKSPRINGS, TX SOUTHWEST TEXAS COMM) SOUTHWEST UNITED COMMUNICATIONS INC SUC COLLEYVILLE, TX SOUTHWESTERN BELL COM SVC INC DBA SBC RICHARDSON, TX SOUTHWESTERN BELL LONG DISTANCE SOUTHWESTERN BELL COMM SERV INC DBA PACIFIC PBX SAN FRANCISCO, CA BELL LONG DISTANCE SOUTHWESTERN BELL COMM SERV, INC DBA AMERITECH SAF PLEASANTON, CA LONG DISTANCE SOUTHWESTERN BELL COMM SERVICES INC DBA NEVADA HNV PLEASANTON, CA BELL LONG DISTANCE SOUTHWESTERN BELL COMMUNICATIONS SVCS INC DBA SBZ PLEASANTON, CA SBC LONG DISTANCE SOUTHWESTERN BELL MOBIL SYSTEMS INC SBM SOUTHWESTERN BELL PERSONAL COMMUNICATIONS INC SWP ST LOUIS, MO SOUTHWESTERN BELL SERVICES SWV LITTLE ROCK, AR SOUTHWESTERN BELL TELECOM SWL RICHARDSON, TX SOUTHWESTERN BELL TELEPHONE SBT ST LOUIS, MO SOUTHWESTERN BELL VIDEO SERVICES, INC. SBV SAN ANTONIO, TX SOUTHWESTERN COMMUNICATIONS INC STH SOUTHWESTERN COMMUNICATIONS SERVICES SSV IRVING, TX SOUTHWESTERN MOBILE COMMUNICATIONS SMC SOVEREIGN COMPANIES, LLC DBA SOVEREIGN OVN DENVER, CO TELECOMMUNICATIONS SPAN-TEL, INC. SPQ GREAT NECK, NY SPARTAN DEBT SERVICES CORPORATION SDV NORCROSS, GA SPATA COMMUNICATIONS CORP. SAP DUBLIN, OH SPECIAL SERVICES RADIOFONE SSE WEATHERFORD, TX SPECIALIZED TELECOMMUNICATION SERVICES, INC. SPZ HAYWARD, CA SPECTRACOM, INC. SPX SHERIDAN, WY SPECTRATEL INC SPL SPECTROCOM SPM SENICIA, CA SPECTRUM COMMUNICATIONS SRU MOSAS LAKE, WA SPECTRUM TELECOM SERVICES INC SUZ MCALLEN, TX SPENCER LDS SPR BREWSTER, MN SPENCER MOBILEPHONE SMP SPENCER MUNICIPAL COMMUNICATIONS UTILITY SUJ SPENCES, IA SPHERA OPTICAL NETWORKS (VIRGINIA) N.A., INC SZV NEW YORK, NY SPHERA OPTICAL NETWORKS N.A., INC. SZN NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–183 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SPJ, INC SPJ ENTERPRISE, AL SPOKANE PAGING & TELECOMMUNICATIONS SPP SPOKANE, WA SPRING VALLEY TELEPHONE LONG DISTANCE, INC. SVH SPRING VALLEY, WI SPRINGFIELD RADIO COMMUNICATIONS INC SFR SPRINT CANADA INC. SRN WILLOWDALE, ON SPRINT CELLULAR SZP CHICAGO, IL SPRINT COMMUNICATIONS INC (PREV SPRINT/US UTC KANSAS CITY, MO TELECOM INC) SPRINT COMMUNICATIONS INC (PREV TELNET/GTE- GTS OVERLAND PARK, KS TELNET SVCS) SPRINT LOCAL TELECOMMUNICATIONS DIVISION(PREV SNK KANSAS CITY, MO SHARED USE NETWORK) SPRINT METROPOLTIAN NETWORKS, INC. SMW ALTAMONTE SPRINGS, FL SPRINT SPECTRUM L.P. (PREV. MAJORCO, L.P.) MJC KANSAS CITY, MO SPRUCE COMMUNICATIONS, LP RUE DALLAS, TX SPURS INC SPU JUPITER, FL ST LONG DISTANCE, INC. SLG SARASOTA, FL ST LOUIS ELECTRONICS SERVICE CORP SLE ST LOUIS, MO ST PAGING STG GARDEN CITY, KS ST REGIS SHERATON HOTEL SRS NEW YORK, NY ST. JOSEPH PCS, INC SJH WINTER PARK, FL ST. PIERRE COMMUNICATION NETWORK SPO ALLEN, TX STALVEY’S SLY GEORGETOWN, SC STANDARD FEDERAL BANK SFB TROY, MI STANDARD INFORMATION SERVICE CORP SIF SANTA ANA, CA STANDARD LONG DISTANCE SDL GARLAND, TX STANDARD TELECOMMUNICATIONS INC STD OAKBROOK, IL STANTON TELECOM INC SXT STANTON, NE STAR BEEPERS STB ROMA, TX STAR COMMUNICATIONS INC SRQ CAPE GIRARDEAU, MO STAR DIRECT TELECOM, INC. SAD SANTA BARBARA, CA STAR NET PAGING, INC. SET PLANO, TX STAR TALK, INC. SKH LAUDERHILL, FL STAR TEL STR STAR TEL OF ABILENE (PREV STAR-TEL) STT ABILENE, TX STAR TEL OF DERITTER SDR DERITTER, TX STAR TEL TRANSMISSIONS STA VICTORIA, TX STAR TEL, INC. (PREV. LUFKIN TELECOMMUNICATIONS LTE BRYAN, TX INC.)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–184 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location STAR TELE. INC DBA ALLSTAR TELECOM (PREV DIGITAL TXL DALLAS, TX NETWORK INC) STAR TELE. INC DBA ALLSTAR TELECOM ( PREV UNITED CZZ IRVINE, TX DIGITAL NETWORK STAR TELE. INC DBA ALLSTAR TELECOM (PREV DIGITAL AWE DALLAS, TX NETWORK INC) STAR TELECOMM. INC DBA ALLSTAR TELECOM (PREV SVE SANTA BARBARA, CA DBA STAR VENDING ) STAR TELECOMMUNICATIONS INC DBA ALLSTAR TOE NEW YORK, NY TELECOM (PREV T-ONE CORP) STAR TELEPHONE COMPANY, INC. SZH BATON ROUGE, LA STAR TELEPHONE MEMBERSHIP CORPORATION SBP CLINTON, NC STAR TOUCH COMMUNICATIONS INC STU ATLANTA, GA STARCOM SAR FT WORTH, TX STARCOM SRX SEATTLE, WA STARCOMM AMERICA INC SAA EMMAUS, PA STARFONE RFO LONG BEACH, CA STARGATE COMMUNICATIONS, INC. SGT DALLAS, TX STARK COMMUNICATIONS SKC STARK RADIOPHONE SRP STAR-LINE INC SRL HARLINGEN, TX STARLINK COMMUNICATIONS, LLC SRK S. SAN FRANCISCO, CA STARONE COMMUNICATION INC. RUN MILWAUKEE, WI STARPAGE COMMUNICATION INC SCO STARPOWER COMMUNICATIONS, LLC SPS PRINCETON, NJ STARTCOMM CORP SMX MIAMI, FL STARTEC INC STZ BETHESDA, MD STARTEL COMMUICATIONS INC STQ IRVING, TX STARTEL VICTORIA STV VICTORIA, TX STARWAY COMMUNICATIONS INC SYO BUFFALO, TX STAT COMMUNICATIONS INC SAM HOUSTON, TX STATE DISCOUNT TELEPHONE SDE HUNTSVILLE, TX STATE DISCOUNT TELEPHONE LLC SDU HUNTSVILLE, TX STATE OF ARKANSAS SAK LITTLE ROCK, AK STATE OF CALIFORNIA-CALNET SOC SACRAMENTO, CA STATE OF ILLINOIS DEPT CENTRAL MGMT SERVICES SIL SPRINGFIELD, IL STATE OF KANSAS SKS TOPEKA, KS STATE OF MONTANA SMA HELENA, MT STATE OF NEBRASKA SNE LINCOLM, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 8–185 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location STATE OF NEW JERSEY SNJ TRENTON, NJ STATE OF NEW YORK-EXECUTIVE DEPT OFFICE GENERAL SNY ALBANY, NY SRVS STATE OF OKLAHOMA FINANCE SOK OKLAHOMA CITY, OK STATE OF OREGON DEPT OF ENERGY ODE STATE TELEPHONE LONG DISTANCE, INC. SOD COXSACKIE, NY STATELINE COMMUNICATIONS, INC. SLQ WEST PLAINS, MO STATEN ISLAND TELECOM, LLC SIB STATEN ISLAND, NY STEAMBOAT COMMUNICATIONS SBO STEAMBOAT SPRINGS, CO STEELVILLE LONG DISTANCE COMPANY, INC. SFV STEELVILLE, MO STELLAR COMMUNICATIONS, INC. EAU VERNON, TX STENOCALL STO LUBBOCK, TX STENTOR CANADIAN NETWORK MANAGEMENT SOR OTTAWA, CN STENTOR CORPORATION SVX FORT LAUDERDALE, FL STERLING LIMITED PARTNERSHIP (PREV STERLING SRG ROSWELL, GA CELLULAR) STERLING TELECOM, INC. ERE HUNTINGTON STATION, NY STI COMMUNICATIONS INC IIT COSHOCTON, OH STICKDOG TELECOM, INC. SKG VIENNA, VA STILLWATER CELLULAR TELEPHONE CO SLW GUTHRIE, OK STNT SERVICES SNV KENNEDALE, TX STOCKTON CELLULAR STK STOCKTON, CA STOCKTON MOBILFONE SKM STONE & CO SOZ DALLAS, TX STONEBRIDGE COMMUNICATIONS, INC. SQG ROSEVILLE, MN STONE’S MOBILE RADIO INC SMR STORM TELECOMMUNICATIONS SQT ATLANTA, GA STOUFFER COMMUNICATIONS, INC. SFF GRANBY, MO STPCS JOINT VENTURE, LLC SJV SCOTTSDALE, AZ STRATOS MOBILE NETWORKS SMK STATEN ISLAND, NY STRATOS TELECOM, INC (PREV SHELL OFFSHORE SOE NEW ORLEANS, LA SERVICES COMPANY) STSJ OVERSEAS TELEPHONE SSJ CAPARRA HEIGHTS, FL SUBURBAN CELLULAR INC SBN DUBLIN, CA SUBURBAN CELLULAR LLC SBA RAPID CITY, SD SUBURBAN CONNECT, INC. SUB OAKS, PA SUBURBAN LODGING CO INC SLC SUITE SYSTEMS INC. SIX CALGARY, AB SULFUR SPRINGS TELECOM SSP PARIS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–186 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SUMMIT CITY RADIO INC SCY FT WAYNE, IN SUMMIT COMMUNICATIONS STC SUMMIT TELESERVICES (PREV. SUMMIT SUM MYRTLE BEACH, SC TELECOMMUNICATIONS) SUMMIT WIRELESS, LLC. SWZ JACKSON, MS SUMRADA COMMUNICATIONS SERVICE INC SUD EAST CONEMAUGH, PA SUN COMMUNICATIONS INC SUX DALLAS, TX SUN COMTEL INC SCQ NEW PORT RICHEY, FL SUN COUNTRY COMMUNICATION SVC SUN TEL SNL W PALM BEACH, FL SUN TELSERVICES OF FLORIDA CORP STF FT LAUDERADALE, FL SUN VALLEY PAGING SVY SUNCOAST COMMUNICATIONS INC SUT SARASOTA, FL SUNGATES COMMUNICATION SGH NEW YORK, NY SUNGLOBE FIBER SYSTEMS CORPORATION SFY SUNRISE, FL SUNGLOBE TELECOM, INC. SGB SUNRISE, FL SUNMAN TELECOMMUNICATIONS CORPORATION LONG SSD SUNMAN, IN DISTANCE SUN-NET INC SNI SAN ANTONIO, TX SUNRISE FINANCIAL GROUP, INC. SFG NEW YORK, NY SUNRISE OPERATOR SRO RICHARDSON, TX SUNSET COAST PAGING SCP BENTON HARBOR, MI SUNSHINE CELLULAR SHI PENSACOLA, FL SUNTEL SUL PHILADELPHIA, PA SUNTEL METRO, INC. SMQ ORLANDO, FL SUNTEL NETWORK, INC.(PREV. SUNSHINE TELEPHONE SNH ORLANDO, FL INC.) SUN-TEL USA, INC UEA JACKSONVILLE, FL SUNWEST COMMUNICATIONS, INC. SWU COLORADO SPRINGS, CO SUPER COM SPW MARQUETTE, MI SUPER_NET INC. SDX BROOKLYN, NY SUPERIOR COMMUNICATIONS TECHNOLOGY CORP. SPY BRONX, NY SUPERIOR DATA NETWORK INC SDN SCOTTSDALE, AZ SUPERIOR TECHNOLOGIES, INC DBA SUPERIOR SXU MARQUETTE, MI SPECTRUM, INC. SUPERPHONE SPH LAS VAGAS, NV SUPERTEL COMMUNICATIONS INC SUE SAN DIEGO, CA SUPERTEL NETWORK INC SEK ROCKLEDGE, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–187 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location SUPRA TELECOMMUNICATIONS AND INFORMATION SUU CORAL GABLES, FL SYSTEMS, INC. SUPREME TELECOM SYSTEMS, INC. SYI FORT WORTH, TX SURE PAGE INC SUP PEORIA HEIGHTS, IL SURETEL, INC. URE OKLAHOMA CITY, OK SURRY TELECOMMUNICATIONS, INC. URR DOBSON, NC SUSQUEHANNA MOBILE COMMUNICATIONS INC SUQ HARRISBURG, PA SWANSON, JAMES E. DBA J S ELECTRONICS JSE MENOMINEE, MI SWARTLEY-AMBS COMMUNICATIONS SAC JACKSON, MI SWARTZLANDER RADIO INC SLR SWEETSER RURAL TELEPHONE CO. SUW SWEETSER, IN SWIFF-TRAIN COMMUNICATIONS SWF SAN ANTONIO, TX SWIFT GLOBAL COMMUNICATIONS INC SWG GLEN HEAD, NY SWIFTTEL COMMUNICATIONS, INC. SWJ VIDALIA, GA SWISHER TELEPHONE COMPANY SWY SWISHER, IA SWISSCOM NORTH AMERICA, INC. SWO WASHINGTON, DC SWITCH 2000 SWH OSSIO, MN SWITCH PORT LEASING WPL DELTONA, FL SWITCHLESS RESELLER SERVICES SWS OKLAHOMA CITY, OK SYGNET COMMUNICATIONS SYG YOUNGSTOWN, OH SYKES SYK SUNNYVAIL, CA SYMTECH COMMUNICATIONS SERVICES SYM HUNTINGDON VALLEY, PA SYNDEO CORPORATION SYD CUPERTINO, CA SYNERGISTIC COMMUNICATIONS SYN KING OF PRUSSIA, PA SYNOPSIS COMMUNICATIONS INCORPORATED YNO CHICAGO, IL SYRACUSE CGSA LIMITED SYL PEARL RIVER, NY SYRACUSE RADIO CALL GENERAL COMMUNICATIONS INC SYR SYRACUSE TELEPHONE CO SYC SYRACUSE, NY SYSTEM ONE OF HOUSTON SHN HOUSTON, TX SYSTEMS 1000 SYZ CLAREMONT, CA T C ENTERPRISES TZE RICHMOND, CA T C S NETWORK SERVICES TCS T D MILLER III RADIO COMMUNICATIONS INC TMR T K COMMUNICATIONS INC TKC T S COMMUNICATIONS TLS SPRINGFIELD, IL T T I COMMUNICATIONS CO TTI T&T COMMUNICATIONS TTF FAIRMONT, WV T.C.T., INC. WIA MIDLAND, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–188 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location T.H. INC. ETH MIDVALE, UT TA MARKETS, INC. AJK LANSING, MI TABBY TELEPHONE, INC. BBL CAMBRIDGE, MA TABLE TOP TELEPHONE COMPANY, INC. BOP AJO, AZ TACOMA TELEPHONE EXCHANGE TMX TACOMA, WA TACONIC TELCOM CORP. TIT CHATHAM, NY TAHOE TELEPHONE CO THT ZEPHYR COVE, NV TALK TIME TKT SCOTTSDALE, AZ TALK TIME COMMUNICATIONS, LTD. TQK JAMAICA, NY TALK VISUAL CORPORATION LVU MIAMI, FL TALKINGNETS HOLDINGS, LLC. LKG WILMINGTON, NC TALKNOW, INC (PREV NEXBELL COMMUNICATIONS, INC.) NXB CLEVELAND, OH TALKSTAR.COM, INC. TKQ MENLO PARK, CA TALLAHASSEE TELEPHONE EXCHANGE INC TFJ TALLAHASSEE, FL TALLGRASS COMMUNICATIONS INC. LGA CHICAGO, IL TALTON COMMUNICATION CORP INC TTN TALTON STC, INC. TKN SAN ANTONIO, TX TALTON TELECOMMUNICATIONS CORP TWL SELMA, AL TAPP COMMUNICATIONS TPP TARGUS INFORMATION CORPORATION TGZ VICTOR, NY TARIFF RESEARCH CORP TFF FENTON, MO TASI INC TAZ TATO’S BEEPERS, INC. TBZ GARDNER, MA TAYLOR TEL COORP TAY MERKEL, TX TAYLOR, JAMES DBA METROTEL MRE TEXARKANA, TX TC3 TELECOM, INC TJQ ADRIAN, MI TCA LONG DISTANCE (PREV. VALUE LINE OF AMARILLO) VOA AMARILLO, TX TCAST COMMUNICATIONS, INC. TAJ LOS ANGELES, CA TCG (PREV LOCATE TELEPHONE COMPANY) LAT STATEN ISLAND, NY TCG DELAWARE VALLEY, INC (PREV EASTERN ETL KING OF PRUSSIA, PA TELELOGIC CORP) TCHAIKOSKY TELCOM THK KENNEDALE, TX TCI OF ILLINOIS, INC. ILX MOLINE, IL TCI OF PA TPX PHILADALPHIA, PA TCI SERVICES INC TIS AUSTIN, TX TCI TELECOM, LLC IOA FLUSHING, NY TCI TELECOMMUNICATIONS CONSULTANTS INC TQC ARLINGTON, TX TCI TELEPHONY SERVICES OF CALIFORNIA, INC. THV ENGLEWOOD, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 8–189 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TCI TELEPHONY SERVICES OF CONNECTICUT, INC. TBO BERLIN, CT TCI TELEPHONY SERVICES OF ILLINOIS, INC. TJI ARLINGTON HEIGHTS, IL TCN INC TQX SAN ANTONIO, TX T-COM INC TZZ JACKSON, MI TDI COMMUNICATIONS, INC. DIZ NEW YORK, NY TDMT LTD INC TDM SYRACUSE, NY TDPC, INC. DPX OXFORD, NC TDS METROCOM, INC(PREV MADISON CLEC MSN CHICAGO, IL CORPORATION) TDS TELECOM TYW MADISON, WI TEAM ELECTRONICS TME TEAM ELECTRONICS TQE ESCANABA, MI TEASE COMMUNICATIONS TZY PLANO, TX TECH COM, INC. TYH BLUE RIVER, WI TECH TELEPHONE COMPANY, LTD TBH LUBBOCK, TX TECH VALLEY COMMUNICATIONS INC EEY ALBANY, NY TECHNI SALES & SERVICE TZH ELMWOOD, NC TECHNOLOGY ASSOCIATES TGY TECHNOLOGY SERVICE GROUP INC TYG TAMPA, FL TECNET TNZ MONROE, LA TECORE INC TXY LINTHICUM, MD TEC-WEST TEW COLORADO SPGS, CO TEGRA, INC. EGR LINCOLN, NE TEK COMMUNICATIONS, INC. (PREV. TELECOMPUTE TEK WASHINGTON, DC CORPORATION) TEKBILT WORLD COMMUNICATIONS, INC. DBA TWC TKW HUNTINGDON VALLEY, PA DIRECT TEKSTAR COMMUNICATIONS, INC TKS GOLDEN VALLEY, MN TEL AMERICA TXZ TULSA, OK TEL AMERICA INC AKA EXTELCOM DBA EXPRESS TEL TMU SALT LAKE, UT TEL CALL IMC TXQ MT VERNON, OH TEL CAR INC TCA TEL RATE SYSTEMS INC TSY TEL SERV (PREV ABERDEEN LIMITED PARTNERSHIP) ALP ABERDEEN, SD TEL SYSTEMS CORPORATION TSZ TEL SYSTEMS MANAGEMENT CORP TSM TEL TEC EXCHANGE INC TTQ AGORUA HILLS, CA TEL TEC EXCHANGE OF PA TTY WAYNE, PA TEL WEST COMMUNICATIONS L.L.C. TZJ MONROVIA, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–190 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELABILITY, INC. TBY EAST ISLIP, NY TEL-AIR COMMUNICATIONS TEA TELALASKA LONG DISTANCE, INC. TKA ANCHORAGE, AK TELAMARKETING COMMUNICATIONS INC TAM LOUISVILLE, KY TELAMARKETING COMMUNICATIONS OF ARKANSAS TAR TELAMARKETING COMMUNICATIONS OF ATLANTA TAA ATLANTA, GA TELAMARKETING COMMUNICATIONS OF BAKERSFIELD TBF BAKERSFIELD, CA (NOW TMC COMM-TVT) TELAMARKETING COMMUNICATIONS OF BATON ROUGE TBR BATON ROUGE, LA TELAMARKETING COMMUNICATIONS OF BURMINGHAM TOB TELAMARKETING COMMUNICATIONS OF CHARLOTTE TAT CHARLOTTE, NC TELAMARKETING COMMUNICATIONS OF CHATTANOOGA TTG CHATANOOGA, TN TELAMARKETING COMMUNICATIONS OF CINCINNATI TTT CINCINNATI, OH TELAMARKETING COMMUNICATIONS OF CLEVELAND TKE CLEVELAND, OH TELAMARKETING COMMUNICATIONS OF CO SPRINGS TCZ CO SPRINGS, CO TELAMARKETING COMMUNICATIONS OF COLUMBIA TCX COLUMBIA, SC TELAMARKETING COMMUNICATIONS OF DAVENPORT TDP DAVENPORT, IA TELAMARKETING COMMUNICATIONS OF DENVER TDV DENVER, CO TELAMARKETING COMMUNICATIONS OF FAYETTEVILLE TFV FAYETTEVILLE, NC TELAMARKETING COMMUNICATIONS OF FT WAYNE TFW FT WAYNE, IN TELAMARKETING COMMUNICATIONS OF GREATER TOP PHILADELPHIA TELAMARKETING COMMUNICATIONS OF HUNTSVILLE TMH HUNTSVILLE, AL TELAMARKETING COMMUNICATIONS OF KNOXVILLE TKV KNOXVILLE, TN TELAMARKETING COMMUNICATIONS OF LAS VEGAS TVG LAS VEGAS, NV TELAMARKETING COMMUNICATIONS OF MADISON TMD MADISON, IN TELAMARKETING COMMUNICATIONS OF MEMPHIS TGC BIRMINGHAM, AL TELAMARKETING COMMUNICATIONS OF MERRILVILLE TMV MERRILVILLE, IN TELAMARKETING COMMUNICATIONS OF MILWAUKEE TMM MILWAUKEE, WI TELAMARKETING COMMUNICATIONS OF MOBILE TMO MOBILE, AL TELAMARKETING COMMUNICATIONS OF MONTEREY BAY MTB MONTEREY, CA INC (INVALID) TELAMARKETING COMMUNICATIONS OF NW INDIANA TNI MUNSTER, IN TELAMARKETING COMMUNICATIONS OF OMAHA TOH OMAHA, NB TELAMARKETING COMMUNICATIONS OF PEORIA TPZ PEORIA, IL TELAMARKETING COMMUNICATIONS OF PIEDMONT TPI GREENSBORO, NC TELAMARKETING COMMUNICATIONS OF RALEIGH TRG RALEIGH, NC TELAMARKETING COMMUNICATIONS OF ROANOKE TRV ROANOKE, VA VALLEY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–191 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELAMARKETING COMMUNICATIONS OF S CALIFORNIA TUF PASADENA, CA TELAMARKETING COMMUNICATIONS OF SAN LUIS TOS OBISPO, CA OBISPO TELAMARKETING COMMUNICATIONS OF SHREVEPORT TLU SHREVEPORT, LA TELAMARKETING COMMUNICATIONS OF STOCKTON TSK VENTURA, CA (NOW TMC COMM-TVT) TELAMARKETING COMMUNICATIONS OF TIDEWATER TDR TIDEWATER, VA TELAMARKETING COMMUNICATIONS OF TRI-STATE TAE CHATANOOGA, TN TELAMARKETING COMMUNICATIONS OF TULSA TTZ TULSA, OK TELAMARKETING COMMUNICATIONS OF W VIRGINIA THQ CHARLESTON, WV TELAMARKETING CORP OF LOUISIANA TKL BATON ROUGE, LA TELAMARKETING OF CHICAGO TGO CHICAGO, IL TELAMCO TAO TELAMERICA TZA MIAMI, FL TEL-AMERICA COMMUNICATIONS SERVICES INC TAC TELAMERICA COMMUNICATIONS, INC. (WAS VOICE VCE MIAMI, FL INTERACTIVE PRODUCTION TELANSWER RADIOPHONE TLR TEL-A-PAGE INC TLA TELAPEX LONG DISTANCE, INC.(PREV. DISTANCE DSR JACKSON, MS DIRECT, INC.) TEL-A-SAVE COMMUNICATIONS SYSTEMS LTD TSQ DURANT, OH TELA-SAVER TVX SAN ANTONIO, TX TEL-A-VOICE COMPANY INC. TBV CENTRALLA, IL TEL-CALL SYSTEMS INC TCL TEL-CALL SYSTEMS INC TCW HOMESTEAD, FL TEL-CAR CORP TCR TEL-CAR OF DAYTONA TCD TEL-CAR OF GAINESVILLE TGV TEL-CAR OF HOLLYWOOD THW TEL-CAR OF MELBOURNE TMB TEL-CAR OF ORLANDO TOL TEL-CAR OF PANAMA CITY TCP TEL-CAR OF PENSACOLA TPS TEL-CENTRAL COMMUNICATIONS INC TER OKLAHOMA CTY, OK TEL-CENTRAL OF JEFFERSON CITY TCQ JEFFERSON CTY, MO TELCO 214, INC. EOU MELBOURNE, FL TELCO DATANET DALLAS INC TDZ DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–192 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELCO GROUP, INC (PREV TELCO INVESTMENT GROUP EIM FLUSHING, NY INC) TELCO GROUP, INC. TOG GRAND PRAIRIE, TX TELCO HOLDINGS, INC (PREV RTI TELECOM. INC) RTI CHANTILLY, VA TELCO HOLDINGS, INC(PREV NATIONAL PAYPHONE USY CHANTILLY, VA SUPPLY DBA RATE SAVER) TELCO NETWORK, L.L.C. EOW BELLEVUE, WA TELCO OF BATON ROUGE INC TBN BATON ROUGE, LA TELCO OF NATCHITOCHES TNS NATCHITOCHES, LA TELCO OF NATCHITOCHES INC THS TELCO SYSTEMS MANAGEMENT INC - TELCO TQO RENO, NV TEL-COM TEO TELCOM COMMUNICATIONS INC TOT FRESNO, CA TELCOM CORPORATION TLM TELCOM EQUIPMENT CORP TEE TEL-COM INC TEZ LEBANON, PA TEL-COM INC TIZ MARSHALL, TX TELCOM INTERNATIONAL INC. DBA ALPHA TELEPHONE AHW SEA CLIFF, NY TELCOM LONG DISTANCE TLG TELCOM MANAGEMENT SYSTEMS LIMITED PARTNERSHIP TYE CHICAGO, IL TELCOM NETWORK, INC. TEJ SAN DIEGO, CA TELCOM OF AMERICA, INC TKU BENSALEM, PA TELCOM OF CANADA (NOW STENTOR -- SOR) TND OTTAWA, ON TELCOM ONE TMK NEW YORK, NY TELCOM PLUS LTD TUX HOMESTEAD, FL TELCOM SUPPLY, INC. ELY LIVINGSTON, TX TELCOMCO TOQ CHEHELIS, WA TELCON DIGITAL NETWORK TDN ALAMEDA, CA TELCORDIA TECHNOLOGIES (PREV. BELLCORE) BCR PISCATAWAY, NJ TELE COMMUNICATIONS INTERNATIONAL TIL LOS ANGELAS, CA TELE DANMARK USA INC TBK WHITE PLAINS, NY TELE SYS INC TEI TELEBEAM TELEPHONE SYSTEMS, INC. EBM LIC, NY TELEBEAM, INC (PREV NORTH AMERICAN NAC STATE COLLEGE, PA COMMUNICATIONS, INC) TELEBEAM, INC (PREV SMART CHOICE LONG DISTANCE SDI STATE COLLEGE, PA INC.) TELEBEC LTEE EBC QUEBEC, PQ TELEBEEP INC TBP

Proprietary — Licensed Material See proprietary restrictions on title page. 8–193 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELE-BEEP PAGING COMPANY TGG BISMARCK, ND TELEBEEPER OF NEW MEXICO TBX ALBUQUERQUE, NM TELEBERMUDA INTERNATIONAL LIMITED (PREV TBI HAMILTON, BM TELEPHONE CO BILLING) TELEC INC. TEF REDFORD, MI TELECABLE TBQ NORFOLK, VA TELECALL INC TLC TELECARD INTERNATIONAL, INC. TJR JACKSON HEIGHTS, NY TELECARE SERVICES, LTD. (PREV V.I.P. PHONE CLUB, VPH TIMONIUM, MD INC) TELECARE, INC. TEB NOBLESVILLE, IN TELECARRIER SERVICES INC. TVI CRANFORD, NJ TELECHECK NORTHWEST INC TCK SEATLE, WA TELECHOICE TCH TELECO PLUS INC TOY MIAMI, FL TELECOIN COMMUNICATIONS TYY RICHARDSON, TX TELECOM AMERICA TIA AVENTURA, FL TELECOM COMMUNICATIONS OF PUERTO RICO INC TPR TELECOM FUNDING, INC. ELF LAS VEGAS, NV TELECOM HOUSE INCORPORATED (PREV STERLING SSS BEVERLY HILLS, CA TELECOMMUNICATION INC) TELECOM INC TLE TELECOM MGMT INTERNATIONAL INC TMQ INDEPENDANCE, MO TELECOM NETWORK SYSTEMS INTERNATIONAL, INC. TJE MIAMI, FL TELECOM NEW ZEALAND USA LTD TZF PASADENA, CA TELECOM OPTIONS PLUS INC TOI LARKSPUR, CO TELECOM QUEBEC INC. EQC BON CONSEIL, CN TELECOM RESOURCES INC(WHOLLY OWNED SUB OF TQG DALLAS, TX IONEX TELECOMM INC.) TELECOM SERVICES CORP TLZ BROOKFIELD, WI TELECOM SUPPORT SYSTEMS INC TZM SIMI VALLEY, CA TELECOM SYSTEMS TSS TELECOM TECHNICIANS, INC. ELH MADISON HEIGHTS, MI TELECOMMUNICATION OF CHARLESTON WV CCW CHARLESTON, WV TELECOMMUNICATION SERVICES CORPORATION TMC BROOKFIELD, WI TELECOMMUNICATION SYSTEMS TSJ ANNAPOLIS, MD TELECOMMUNICATION TECHNOLOGIES INC TQT SAN DIEGO, CA TELECOMMUNICATIONS ACCESS FOR COMM. IMPAIRED TAB SAINT PAUL, MN PERSEONS BOARD

Proprietary — Licensed Material See proprietary restrictions on title page. 8–194 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELECOMMUNICATIONS AT LOW KOST INC TKI TELECOMMUNICATIONS COOPERATIVE NETWORK TOO NEW YORK, NY TELECOMMUNICATIONS CORPORATION OF AMERICA, TAF HARFORD, CT INC. TELECOMMUNICATIONS FACILITIES MANAGEMENT INC TFM TELECOMMUNICATIONS LINK INC TZL PLYMOUTH, MN TELECOMMUNICATIONS MANAGEMENT GROUP, L.L.C. TUP HATTIESBURG, MI TELECOMMUNICATIONS NETWORK INC TQN KENDALL PARK, NJ TELECOMMUNICATIONS NETWORK OF AMERICA INC TNA TELECOMMUNICATIONS SERVICE CENTER INC TUV TAMPA, FL TELECOMMUNICATIONS SYSTEMS INC TSI TELECOMONE TNB MCLEAN, VA TELECOMP COMMUNICATIONS SERVICES TPK OAKBROOK TERRACE, IL TELECOMPUTER INC TCI TELECON TOX HERKEMER, NY TELECONCEPTS INC TQP PRINCETON, NJ TELECONCEPTS INC TZQ COLORADO SPRINGS, CO TELECONEX TKX PENSACOLA, FL TELECONNECT CO TCC CEDAR RAPIDS, IA TELECONNECT SYSTEMS INC TSN MONROE, LA TELECONOMICO USA, INC TKF THE WOODLANDS, TX TELECORP HOLDING CORP. INC. TGH WASHINGTON, DC TELECOURIER COMMUNICATIONS TOU BLOONINGTON, IL TELECUBA INC LEB MIAMI, FL TELEDATA INTERNATIONAL INC TDE ATLANTA, GA TELEDIRECT TELECOMMUNICATIONS GROUP LLC DRG LOS ANGELES, CA TELEFIND CORP TFD HOUSTON, TX TELEFONIA INALAMBRICA DE NORTE (TELINOR) TBJ MONTERREY, XL TELEFONICA LARGA DISTANCIA TFC SAN JUAN, PR TELEFONOS DEL NOROESTE, S.A. DE C.V. TFE TIJUANA, XB TELEFYNE INCORPORATED EFY PACE, FL TELEGATE, INC. EGE ARLINGTON, VA TELE-GLOBAL COMMUNICATIONS, INC. TGM ROME, NY TELEGLOBE CANADA INC. GCA MONTREAL, PQ TELEGLOBE USA INC. TGU MCLEAN, VA TELEGLOBE USA, INC(PREV SDC CORPORATION) SDD MCLEAN, VA TELEGRATION, INC. TGT TROY, MI TELEGROUP INC TGP FAIRFIELD, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–195 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELEHOP COMMUNICATIONS INC THI NEWMARKET, ON TELE-LINK INC TLK TELE-LINK OF IDAHO LLC TIH MEDIDIAN, ID TELEMANAGEMENT ADVANTAGE CORP TVQ LOS ANGELES, CA TELEMANAGEMENT SERVICES INC TVJ WESTLAKE VIILLAGE, CA TELEMANAGEMENT SYSTEMS, INC. BMG ENGLEWOOD, CO TELEMARKETING COMMUNICATIONS OF AMERICA INC TEQ BEDFORD, TX TELEMARKETING COMMUNICATIONS OF COLUMBUS TOC TELEMARKETING COMMUNICATIONS OF EVANSVILLE TEV EVANSVILLE, IN TELEMARKETING COMMUNICATIONS OF FRESNO (NOW TFO LOUISVILLE, KY TMC COMMS - TVT) TELEMARKETING COMMUNICATIONS OF GREATER TGL OAKBROOK TER, IL ILLINOIS TELEMARKETING COMMUNICATIONS OF HOUSTON THN CHARLESTON, WV TELEMARKETING COMMUNICATIONS OF INDIANAPOLIS TAI TELEMARKETING COMMUNICATIONS OF JACKSONVILLE TJV JACKSONVILLE, FL TELEMARKETING COMMUNICATIONS OF LAFAYETTE TLF LAFAYETTE, LA TELEMARKETING COMMUNICATIONS OF LOUISVILLE TLV LOUISVILLE, KY TELEMARKETING COMMUNICATIONS OF MIAMI TMI MIAMI, FL TELEMARKETING COMMUNICATIONS OF MISSISSIPPI TOJ (JACKSON) TELEMARKETING COMMUNICATIONS OF MONTEREY TMY MONTEREY, CA TELEMARKETING COMMUNICATIONS OF NASHVILLE (SEE TNL NASHVILLE, TN ADG) TELEMARKETING COMMUNICATIONS OF NJ TNJ CHERRY HILL, NJ TELEMARKETING COMMUNICATIONS OF SAVANNAH TAV TELEMARKETING COMMUNICATIONS OF TALLAHASSEE TLH TALLAHASSEE, FL TELEMARKETING COMMUNICATIONS OF TRI-CITIES TIC KINGSPORT, TN TELEMARKETING OF OKLAHOMA CITY TOK OKLAHOMA CITY, OK TELEMART COMMUNICATIONS TMT TELEMATIC/VIP COMMUNICATIONS TVP SOUTH HAPTON, PA TELEMAX INTERNATIONAL CORP. TXG BROOKLYN, NY TELEMAXX COMMUNICATIONS LLC TJA CLEVELAND, OH TELEMEDIA INTERNATIONAL U.S.A., INC. TUW JERSEY CITY, NJ TELEMONEY SERVICES TEY LAKEWOOD, OH TELENATIONAL COMMUNICATIONS TJC OMAHA, NE TELENET COMMISSION TWT INDIANAPOLIS, IN TELENET COMMUNICATIONS TNH LEWISVILLE, TX TELENET INC DBA HYDE PARK BEEPERS & COMPUTING HPB CHICAGO, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–196 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELENET INCORPORATED TFH CHICAGO, IL TELENETWORK, INC. ENX SAN MARCOS, TX TELENOR GLOBAL SERVICES AS GSZ OSLO, NW TELENOVA COMMUNICATIONS LNA MIAMI, FL TELE-ONE COMMUNICATIONS INC TFZ TYLU, TX TELEPACIFIC COMMUNICATIONS TFU LOS ANGELES, CA TELEPACIFIC NETWORK, INC. TFK TAMUNING, GM TELEPAGE COMMUNICATIONS SYSTEMS INC EMY VIENNA, WV TELE-PAGE CORPORATION TPG TELEPAGE INC TEG TELEPAGE NORTHWEST TZN PORTLAND, OR TELEPAGE OF ARKANSAS INC TGA LITTLE ROCK, AR TELEPAGE OF BEAUFORT TPB TELEPAK NETWORKS, INC EPN JACKSON, MS TELEPAK, INC. EEK JACKSON, MS TELEPERO INC TPO FAIRFAX, VA TELEPHONE AND RADIO ANSWERING SERVICE TRO TELEPHONE AND TWO-WAY INC. TPJ CLEVELAND, OH TELEPHONE ANNOUNCEMENT SYSTEMS INC TYZ MARLTON, NJ TELEPHONE ANSWER SVC INC TAW TELEPHONE ANSWERING SERVICE INC TPA GRAND RAPIDS, MI TELEPHONE ANSWERING SERVICE OF MORGANTON TSV TELEPHONE ANSWERING SERVICE OF OWBO TSO TELEPHONE ANSWERING SERVICE OF TAUNTON TAN TELEPHONE ASSOCIATES TAK SUPERIOR, WI TELEPHONE ASSOCIATES LONG DISTANCE TDS DALUTH, MN TELEPHONE BILLING SERVICES, INC. (PREV. LONG LVL HENDERSON, NV DISTANCE BILLING) TELEPHONE BUDGETING SERVICES INC TBS TELEPHONE BUSINESS SYSTEMS TBU TELEPHONE COMMUNICATIONS CORP THZ VAIL, CO TELEPHONE COMMUNICATIONS INC TCN LANSING, MI TELEPHONE COMPANY OF CENTRAL FLORIDA, INC. CFK LAKEMARY, FL TELEPHONE CONNECTION OF LOS ANGELES INC TLW MARINE DEL REY, CA TELEPHONE CONNECTIONS TPQ MOUNTAIN HOME, AK TELEPHONE ECONOMY LEAGUE TPV JENKINTOWN, PA TELEPHONE ELECTRONICS CORP WEST TWS MONROE, LA TELEPHONE ELECTRONICS NETWORK LTD TRW YORK, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–197 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELEPHONE EXPRESS TEC TELEPHONE EXPRESS INC TXP DALTON, GA TELEPHONE GUEVREMONT INC. EGV STE- ROSALIE, CN TELEPHONE MANAGEMENT CORP THM PORTLAND, OR TELEPHONE MANAGEMENT SYSTEMS INC TMS TELEPHONE MILOT INC. EHM ST PAULIN, CN TELEPHONE MILOT MOBILITE INC. MYY PAULIN, CN TELEPHONE NETWORK DESIGNS INC TDI DALLAS, TX TELEPHONE RESTORATION NETWORK, INC. DBA TELNET TJN PORTLAND, OR TELEPHONE SECRETARIAL SERVICE TSE TELEPHONE SUPPORT SYSTEMS INC TZU FT MEYERS, FL TELEPHONE SYSTEM TSL TALLAHASSEE, FL TELEPHONE SYSTEMS INC TSX PITTSBURGH, PA TELEPHONE TOWNHALL MEETINGS, INC. (PREV. CPH CZH NEWPORT BEACH, CA TELEMANAGEMENT, INC) TELEPHONE U S A TEU TELEPHONE WAREHOUSE INC TWI TELEPOINT COMMUNICATIONS INC TPT TELEPOOL NETWORK, INC. TWB MINNEAPOLIS, MN TELEPORT COMMUNICATIONS BOSTON TBT BOSTON, MA TELEPORT COMMUNICATIONS DALLAS TZP DALLAS, TX TELEPORT COMMUNICATIONS GROUP TGQ PHOENIX, AZ TELEPORT COMMUNICATIONS GROUP INC (WHOLLY TPM DAYTON, NJ OWNED SUB. OF AT&T) TELEPORT COMMUNICATIONS GROUP OF LOS ANGELES TGS LOS ANGELES, CA TELEPORT COMMUNICATIONS GROUP OF OMAHA TQH OMAHA, NE TELEPORT COMMUNICATIONS GROUP OF SAN TFR SAN FRANCISCO, CA FRANCISCO TELEPORT COMMUNICATIONS GROUP SAN DIEGO TQD SAN DIEGO, CA TELEPORT COMMUNICATIONS HOUSTON THO HOUSTON, TX TELEPORT COMMUNICATIONS OF CHICAGO TPY CHICAGO, IL TELEPRENEUR ENTERPRISES TUR OAKLAND, CA TELE-PRO COMMUNICATIONS CORPORATION EPQ SPRINGFIELD, NJ TELERGY JOINT VENTURE TYV DEWITT, NY TELERGY, INC. TYQ SYRACUSE, NY TELE-SAVERS, INC ESV LAWRENCE, KS TELESCAN INC TZC KINGSPORT, TN TELESELECT GROUP INC TGJ TUCSON, AZ TELESHARE INC OF LAS VEGAS TEL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–198 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELESPHERE COMMUNICATIONS INC (NOW WILTEL - NLT OAKBROOK, IL WTL) TELESPHERE COMMUNICATIONS INC (NOW WILTEL - TEN OAKBROOK, IL WTL) TELESPHERE INTERNATIONAL TSP TELESPHERE OF HOUSTON THU HOUSTON, TX TELESPRECTUM COMMUNICATIONS, INC. ELJ FARGO, ND TELESTAR 900 TZS RANCHO CARDOVA, CA TELE-SYS INC TYS OAKRIDGE, TN TELETEC COMMUNICATIONS TTD COLUMBUS, MO TELE-TECH INC TTH SOUIX FALLS, SD TELETEK TKK EAST GRAND RAPIDS, MI TELETEX TTX AUSTIN, TX TELETOUCH TLJ TYLER, TX TELE-TREND COMMUNICATIONS, L.L.C. TDW ENGLEWOOD, CO TELETRON COMMUNICATIONS ELECTRONICS TCF COOS BAY, OR TELEVALUE CORP. DBA ECON-O-DIAL RIDGECREST(PREV. TVC RIDGECREST, CA TELEVALUE COMM) TELEVIEW COMMUNICATIONS, INC TVW LESLIE, GA TELE-WAVES TWQ PASCO, WA TELHAWAII, INC. TIB NAALEHU, HI TELIA NORTH AMERICA, INC. TJL MCLEAN, VA TELIC COMMUNICATIONS DBA TELIC.NET EIN NEW YORK, NY TELICOR INC. ELR SEATTLE, WA TELIDENT INC. TJD MINNEAPOLIS, MN TELIGENT SERVICES INC (PREV ASSOCIATED GROUP DBA ASD LOS ANGELES, CA ASSOC. COMM LA) TELIGENT SERVICES, INC. (PREV TELIGENT INC. ) MWV VIENNA, VA TELJET, INC. EJT ST. JOHNSBURY, VT TELKOM SA, LTD TKD PRETORIA, SA TEL-LINK, LLC TIK ATLANTA, GA TELLURIDE PAGING & COMMUNICATIONS TUD PAONIA, CO TEL-MANAGEMENT CORP TMG DALLAS, TX TELMATCH TELECOMMUNICATIONS TEH FLORENCE, SC TELMEX LARGA DISTANCIA TXH COLONIA CUAUHTEMOC, MX TELNET TNT TELNET COMMUNICATIONS, L.L.C. TJO MORRISTOWN, NJ TELNET GLOBAL COMMUNICATIONS TGB PHILADELPHIA, PA TELNET OF DICKINSON INC. TDK DICKINSON, ND

Proprietary — Licensed Material See proprietary restrictions on title page. 8–199 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELNET WORLDWIDE, INC TJZ BIRMINGHAM, MI TELNEX INC TXI TAMPA, FL TEL-ONE (PREV. DELTA TELECOMMUNICATIONS) DLL STOCKTON, CA TELONE TELECOMMUNICATIONS, INC. TIJ PASADENA, TX TEL-OPS LLC EOZ TAMPA, FL TEL-OPTIC, INC DBA UNIVERSAL NETWORK SVC(PREV. DCN FORT SMITH, AR DISCOUNT COMM SVC) TEL-OPTIC,INC DBA UNIVERSAL NETWORK SVCS(PREV HGS SAN ANTONIO, TX HUGHES LONG DIS.) TEL-PAGE CORP OF WISCONSIN TLP TELPAGE INC TPE TEL-PAGE INC TGE TELPAGE LTD TLL TEL-PAGE OF CLEVELAND INC TCV TELPAGE OF NASHVILLE TNV TEL-PAGE OF ORANGEBURG TLO TEL-PAGE OF SOUTH CAROLINA TSC TELPAGE OF TENNESSEE TTE TEL-PAGE OF TENNESSEE INC TLT TELPLEX INC. TXK TUCSON, AZ TELQUEST COMMUNICATIONS, CORP TQJ NAPLES, FL TELQUEST TECHNOLOGIES, LLC DBA QUALTEL EQQ PHOENIX, AZ COMMUNICATIONS TELROUTE COMMUNICATION INC TWP NORTH YORK, ON TELSADE COMMUNICATIONS TDC SPRINGVILLE, IL TELSAT COMMUNICATIONS INC TSA DOVER, DE TEL-SAVE TVV TELSAVE INC TVE BROOKFIELD, WI TELSCAPE INTERNATIONAL, INC.(PREV. ORION DNM HOUSTON, TX COMMUNICATIONS, INC.) TELSCAPE USA INC TJU HOUSTON, TX TELSEON CARRIER SERVICES, INC. ECV ENGLEWOOD, CO TELSERVE COMMUNICATION, INC. TVM RICHARDSON, TX TEL-SHARE TSH TELSO INC TSU HOUSTON, TX TEL-SPAN COMMUNICATIONS INC TSW NASHVILLE, TN TELSTAR COMMUNICATIONS INC TTR TELSTAR INC TES TELSTAR INTERNATIONAL INC LNR WHITE PLAINS, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–200 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TELSTAR TELECOM LLC TKO TEMPE, AZ TELSTRA TGK ESAT BRUNSWICK, NJ TEL-SYSTEMS INC TLY ALBUQUERQUE, NM TEL-TOLL INC TLI BAKERSFIELD, CA TELTRUST, INC. TUT SALT LAKE CITY, UT TELUPTON 2000 INC. LPO UPTON, CN TELUS COMMUNICATIONS INC TUG CALGARY, AB TELUS COMMUNICATIONS INC TUQ SACRAMENTO, CA TELUS INTEGRATED COMMUNICATIONS EID EDMONTON, AB TELVUE CORP (PREV SCIENCE DYNAMIC) SDY CHERRY HILL, NJ TELWEST INC TXW JACKSON, MS TEMPEST ASSOCIATES INC. TPW GREAT NECK, NY TEMPLETON TELEPHONE COMPANY TQM TEMPLETON, IA TEMPORARILY ASSIGNED TO EXACT FOR TESTING WWW PISCATAWAY, NJ PURPOSES TENCOM TZO VAN NUYS, CA TENEX COMMUNICATIONS CORP TNX WHITEPLAINS, NY TENKAL COMPANY T/A SCATTER CREEK EKR TENINO, WA COMMUNICATIONS TENNECO INC TNQ HOUSTON, TX TENNESSEE RSA NO 3 LIMITED PARTNERSHIP ENP KNOXVILLE, TN TERN WIRELESS LP TGW EAST STROUDSBURG, PA TERRE HAUTE COMMUNICATIONS INC TRH TERRE HAUTE, IN TERRY TRUELOVE, DBA METROTEL TELEPHONE EUE TULSA, OK COMPANY TESCO TELECOMMUNICATION ENGINEERING SERVICES TJS MILL VALLEY, CA CO TESS COMMUNICATIONS, INC. TGF EVERGREEN, CO TESTCO INC TIN TETON COMMUNICATIONS INC TWU IDAHO FALLS, ID TEW-WAY COMMUNICATIONS INC TWW METAIRIE, LA TEXACO REFINING & MARKETING INC TRK BELLAIRE, TX TEXACOM CORPORATION TXD HOUSTON, TX TEXAPAGE TXA PARIS, TX TEXAS 12 CELLULAR CORPORATION TXU FAIRFIELD, CA TEXAS 5 CORP TXF LEXINGTON, KY TEXAS ASSOCIATION OF PAGING SERVICES TVR WACO, TX TEXAS COMMUNICATIONS TXS SAN ANGELO, TX TEXAS COMMUNICATIONS OF AUSTIN INC TJX AUSTIN, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–201 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TEXAS COMMUNICATIONS OF BRYAN TXB BRYAN, TX TEXAS COMMUNICATIONS, INC. TXE ABILENE, TX TEXAS DIAL TONE, INC. TIV SAN ANTONIO, TX TEXAS HOMETEL, INC. DBA 877-RING AGAIN TKH DALLAS, TX TEXAS INSTRUMENTS, INC. TXJ DALLAS, TX TEXAS LONG DISTANCE (CONROE) XCN CONROE, TX TEXAS NETWORK COMMUNICATIONS, INC. EKW HOUSTON, TX TEXAS NETWORKING, INC. TKG AUSTIN, TX TEXAS RSA 15B2 LIMITED PARTNERSHIP TXR KERRVILLE, TX TEXAS RSA 7B3, INC DBA PEOPLES WIRELESS SERVICES EXW QUITMAN, TX CORPORATION TEXAS STATE TELEPHONE TZG HUNTSVILLE, TX TEXAS TWO-WAY FONE TYF JACKSBORO, TX TEXCOM INC TXC TEX-NET INC TXN SAN ANTIONIO, TX TEX-NET INC AUSTIN TAU AUSTIN, TX TEXOMA BUSINESS MACHINES INC TXM SHERMAN, TX TEXOMA MOBILFONE TMF TEXUSTELL INC TXT HOUSTON, TX TFC OPERATOR SERVICES INC TFP JACKSON, MS TGEC COMMUNICATIONS CO., LLC TGX SAN FRANCISCO, CA THACKER-GRIGSBY TELEPHONE CO., INC. HGR HINDMAN, KY THE ASSOCIATED PRESS APX NEW YORK, NY THE ATLANTA LINE TAQ CONYERS, GA THE ATLANTIC-PACIFIC TELECOMMUNICATIONS TAP ENTERPRISES CORP THE BASICO GROUP, INC BIO CORAL GABLES, FL THE BAYOU TELEPHONE COMPANY, INC. BYU MORGAN CITY, LA THE BEEPER COMPANY (SUB OF R&B COMM.) BER DALEVILLE, VA THE BEEPER DEPOT EEP RIALTO, CA THE BENTLEYVILLE LONG DISTANCE COMPANY BLV BENTLEYVILLE, PA THE BLUE VALLEY TELEPHONE COMPANY BVY HOME, KS THE CABLE AND WIRELESS PUBLIC LIMITED COMPANY AWG HAMILTON, BM THE CARLTON GROUP, INC. RLO MADISON, WI THE CARTER ORGANIZATION TCE NEW YORK, NY THE CHAMPAIGN TELEPHONE COMPANY HPN URBANA, OH THE CHEAPEST ONE CORP HEO GARDEN CITY, NY THE COMMUNICATIONS CENTER INC TCO THE CONCORD TELEPHONE COMPANY CJG CONCORD, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–202 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location THE CONNECTION TQQ JUNEAU, AK THE CONTACT NETWORK, INC. DBA INLINE OIL BIRMINGHAM, AL THE CONTINENTAL GROUP TCG THE CORCORAN GROUP THP MINNEAPOLIS, MN THE CUSTOMER SOLUTIONS GROUP LLC SGA AURORA, IL THE DARIEN TELEPHONE CO DAE DARIEN, GA THE DOBSON GROUP, INCORPORATED DDG INDIANAPOLIS, IN THE ELECTRIC AND WATER PLANT BOARD OF THE CITY EWB FRANKFORT, KY OF FRANKFORT THE EMPIRE DISTRICT ELECTRIC COMPANY TJJ JOPLIN, MO THE FASHION STATION TFS THE FONE COMPANY TFN LONGBEACH, CA THE FURST GROUP, INC. TFG SHAMONG, NJ THE GERSON GROUP, INC. GEG BOSTON, MA THE GLOBAL TELE EXCHANGE GTZ MCLEAN, VA THE GOLDEN BELT TELEPHONE ASSOCIATION, INC. GBH RUSH CENTER, KS THE HALEY CORP THY NEW YORK, NY THE HEADQUARTERS COMPANIES INC THC THE HOTEL ROANOKE THR THE INSIDE EDGE COMMUNICATIONS INC IEM TAMPA, FL THE ISLAND TELEPHONE COMPANY LIMITED ISO PRINCE EDWARD ISLAND, CN THE LEAST EXPENSIVE CORP LXC GARDEN CITY, NY THE LONG DISTANCE PARTNERSHIP, L.P. TGD BURLINGTON, VT THE LONG DISTANCE TELEPHONE CO TLD THE MARNE AND ELK HORN TELEPHONE COMPANY MEH DES MOINES, IA THE MARSEILLES TELEPHONE COMPANY OF MARSEILLES MPK METAMORA, IL ILLINOIS THE MILLENNIUM GROUP TELEMANAGEMENT MGL BROOKFIELD, WI CORPORATION THE NETWORK TNK THE NEW BRUNSWICK TELEPHONE COMPANY, LIMITED NBR SAINT JOHN, NB THE NEW KNOXVILLE TELEPHONE COMPANY NKX NEW KNOXVILLE, OH THE OHIO STATE UNIVERSITY OHS COLUMBUS, OH THE OTHER PHONE COMPANY, INC. DBA ACCESS ONE PYP FORT LAUDERDALE, FL COMMUNICATIONS THE PENNSYLVANIA STATE UNIVERSITY PVS UNIVERSITY PARK, PA THE PHONE COMPANY (PREV TEL-SAVE INC) TVN NEW HOPE, PA THE PINE TREE TELEPHONE AND TELEGRAPH CO PTT THE PONDER GROUP, INC. DPR SAN ANTONIO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–203 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location THE SWITCH CENTER SCC PONCA CITY, OK THE SWITCHBOARD SBD WOODWARD, OK THE TELEPHONE CONNECTION IXC SERVICES, LLC HIX LOS ANGELES, CA THE TELEPHONE CONNECTION LOCAL SERVICES, LLC. YLS LOS ANGELES, CA THE TEXAS LONE STAR NETWORK LXS AUSTIN, TX THE ULTIMATE CONNECTION L.C. DBA DAYSTAR ULA PORT CHARLOTTE, FL COMMUNICATIONS THE VANGUARD GROUP VNG VALLEY FORGE, PA THE WARDROBE MAKER TWM BOSTON, MA THE WATSPHONE CO WAT THE WINN TELEPHONE COMPANY DBA WINN TELECOM WIY WINN, MI THE WITLEY GROUP INC WGI WEST PALM BEACH, FL THE WOODBURY TELEPHONE COMPANY WBY WOODBURY, CT THIEF RIVER FALLS LONG DISTANCE TFL THIEF RIVER FALLS, MN THOMAS TELEPHONE ANSWERING SERVICE TTA THOMPSON COMMUNICATIONS, INC. THJ SPOKANE, WA THORN COMMUNICATIONS, LLC TQZ NEW YORK, NY THOUSAND ISLANDS COMMUNICATIONS COMPANY, L.L.C. TJG CLAYTON, NY THREE RIVER TELCO HRV LYNCH, NE THREE RIVERS TELEPHONE, INC. TVH FAIRFIELD, MT THRIF-TCOMM TELECOMMUNICATIONS SERVICES, INC. TFT LANCASTER, PA THRIFTLINE INC THL HARLINGEN, TX THRIFTY CALL TYC LINCOLN, NE THRIFTY TELEPHONE EXCHANGE THF BEAVERTON, OR THRIFTY TELEPHONE EXCHANGE OF SANTA FE TRY SANTA FE, NM THRUCOMM INC. TJM FAIRFIELD, OH THUMB CELLULAR TBC PIGEON, MI TIAGRIS CORPORATION IGO MCALLEN, TX TIDALWAVE TELEPHONE INC TVZ CHANTILLY, VA TIE/COMMUNICATIONS, INC. TBB OVERLAND PARK, KS TIGON CORP TIG DALLAS, TX TII INCORPORATED TKJ LOS ANGELES, CA TIME WARNER COMMUNICATIONS TIM AUSTIN, TX TIME WARNER CONNECT TIW ENGLEWOOD, CO TIME WARNER TELECOM OF CALIFORNIA L.P. (PREV TIME TWF SAN DIEGO, CA WARNER AXS CA) TIMELY INFORMATION CORP TYP CRANFORD, NJ TIMEWARNER COMMUNICATIONS TWD ENGLEWOOD, CO TIN CAN COMMUNICATIONS COMPANY, L.L.C. TYA HOUSTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–204 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TIPTON CONSTRUCTION CO OF TX INC DBA ADVANCED TJH HOUSTON, TX COMMUNICATING TECH. TLD INC TZD SAN JUAN, PR TLX COMMUNICATIONS, INC. DBA TELAMERICA L.D. UTD BATON ROUGE, LA (PREV UNITED TELE CO TMC COMMUNICATIONS (PREV TMC OF VENTURA) TVT VENTURA, CA TMC COMMUNICATIONS OF DELAWARE, INC. DEA BETHESDA, MD TMC LONG DISTANCE DBA CHERRY COMMUNICATIONS TSD WESTCHESTER, IL INC TMC OF SANTA BARBARA (NOW TMC COMMUNICATIONS - TSB SANTA BARBARA, CA TVT) TMC OF SOUTH CENTRAL INDIANA TID BLOOMINGTON, IN TMC OF TOLEDO TTO TOLEDO, OH TMC OF VIRGINIA, INC. MVV BETHESDA, MD TMC WORLDWIDE, INC. TDF SAN DIEGO, CA TMC/AMERICA INC (PREV TELEMARKETING COMMS TDH BEDFORD, TX AMERICA) TMC-MARSCH TMZ TMEX USA, INC. MXU NEW PORT BEACH, CA TMI COMMUNICATIONS TMJ OTTAWA, ON TMP CORPORATION MXP GOLDEN, IL T-NETIX, INC.(PREV. TELE-MATIC CORP) TMW ENGLEWOOD, CO TNT, INC. (TOTAL NATIONAL TELECOMMUNICATIONS, TNG HOUSTON, TX INC.) TNTSA COMMUNICATIONS TNF KENNEDALE, TX TODCO TDO TOLEDO AREA TELECOMMUNICATIONS SERVICES, INC. OAS TOLEDO, OH TOLL CALL, INC. TOF NORCROSS, GA TOLL COMMUNICATIONS TCU TOLL COMMUNICATIONS CONSULTANTS INC TLQ SPOKANE, WA TOMPHONE INC TPH TONCOM, INC TZK TONICA, IL TONE COMMUNICATIONS SERVICE TNE TOOR INC/DBA QSERVICES TQV HOUSTON, TX TOPAZ TRADING OPZ FOREST HILLS, NY TOPP COMM, INC. OPP MIAMI, FL TOPPER ENTERPRISES TNP HOLIGEN, TX TOPSHAM TELEPHONE CO HAM E CORINTH, VT TOTAL AVAILABILITY SERVICES INC TAL TOTAL CALL INTERNATIONAL INC OTK LOS ANGELES, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–205 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TOTAL COM., INC. TOD ENID, OK TOTAL COMMUNICATION SERVICES, INC. TCJ CEDAR RAPIDS, IA TOTAL COMMUNICATION SYSTEMS TQS SENECA, SC TOTAL COMMUNICATIONS TTL TOTAL MEDIA TECHNOLOGIES, INC. TYK SAN DIEGO, CA TOTAL NETWORK COMMUNICATIONS, INC. OTW RICHLAND, WA TOTAL RISK MANAGEMENT, INC. TKM KANSAS CITY, MO TOTAL TELECOMMUNICATIONS SERVICES, INC. TTJ OKLAHOMA CITY, OK TOTAL TELE-PAGE OF NEBRASKA TTP NORTH PLATTE, NE TOTAL TELEPHONE, INC. OF UTAH THE NORTH SALT LAKE, UT TOTALAXCESS.COM OTA OAKLAND, CA TOTALCOM AMERICA CORPORATION OAE MIAMI, FL TOTALINK OF INDIANA, LLC. OIN FRANKLIN, MA TOTALINK OF MASSACHUSETTS, LLC. OMJ FRANKLIN, MA TOTALINK OF MICHIGAN, LLC. OMY FRANKLIN, MA TOTALINK OF OHIO, LLC. OOO FRANKLIN, MA TO-TEL COMMUNICATIONS SYSTEMS INC TOZ GRANGEVILLE, ID TOUCH 1 COMUNICATIONS, INC. TUM ATMORE, AL TOUCH AMERICA HELENA TAH HELENA, MT TOUCH AMERICA, INC (PREV TELECOMMUNICATIONS MMI BUTTE, MT RESOURCES INC) TOUCH AMERICA, INC. THA MISSOULA, MT TOUCH AMERICA, INC. (PREV TOUCH AMERICA SERVICES AUD BUTTE, MT INC) TOUCH AND SAVE TAS TOUCH AND SAVE OF NASHVILLE TON TOUCH TEL CORP. THD BURLINGAME, CA TOUCH TONE AMERICA, INC. TUU PHOENIX, AZ TOUCH TONE COMMUNICATIONS OTY WHIPPANY, NJ TOUCH TONE INTERACTIVE, INC. TVU PHOENIX, AZ TOUCH-TEL COMMUNICATIONS, INC TUJ HOUSTON, TX TOUCHTONE COMMUNICATIONS TVK LONDON, KY TOUCHTONE COMMUNICATIONS 2000 LTD TBM VANCOUVER, BC TOWER COMMMUNICATIONS INC TWC TOWER COMMUNICATIONS TWE LOS ANGELES, CA TOWN AND COUNTRY COMMUNICATIONS TCY TOWN OF EAGLE MOUNTAIN OEM EAGLE MOUNTAIN, UT TPC INFORMATION SYSTEMS INC. TIF DANBURY, CT TRACE COMMUNICATIONS INC TEX FLORENCE, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–206 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TRACY CORP TRC TRAIL BLAZER SYSTEMS TLB TRANS GLOBAL COMMUNICATIONS INC. TGI NEW YORK, NY TRANS NATIONAL TELECOMMUNICATIONS, INC. TFA SAN ANTONIO, TX TRANS TEXAS PCS RTX KERRIVILLE, TX TRANS WORLD AIRLINES INC TWA NEW YORK, NY TRANSACTION NETWORK SERVICES INC(PREV PSINET TAX RESTON, VA TRANSACTION SOLU..) TRANSACTION NETWORKS INC TWZ BOYNTON BEACH, FL TRANSACTION SYSTEMS INC XAC VIENNA, VA TRANSAMERICA COMMUNICATIONS INC TNM BOCA RATON, FL TRANSAMERICA MANAGEMENT TMA LOS ANGELES, CA TRANSAMERICAN COMMUNICATIONS CORP TRA TRANSAMERICAN SYSTEMS INC TRS TRANSAMERICAN TELEPHONE SYSTEMS TTS TRANSAMERICAN TELEPHONE, INC. TKB DENTON, TX TRANS-ASIA TRADING, INC. RSS SAN FRANCISCO, CA TRANSBEAM, INC (PREV MEDIA LOG, INC) MOQ NEW YORK, NY TRANS-BORDER COMMUNICATIONS, INC TRB LAIEDO, TX TRANSCOMM NET INC TWN PLYMOUTH, MN TRANSIT NETWORKS, LLC TKY NEW YORK, NY TRANSLINE COMMUNICATIONS INC TQA PRAIRIE VILLAGE, KS TRANSNATIONAL NETWORK INC TNN TRANSNET TZT TAMPA, FL TRANSPACIFIC TELECOMMUNICATION INC TPF SEATTLE, WA TRANSPONDER CORP OF DENVER TPC TRANSTAR COMMUNICATIONS, L.C. TUB BEDFORD, TX TRANSTELL COMMUNICATION TRL OAKLAND, CA TRANSWAVE COMMUNICATIONS CO TWV ATLANTA, GA TRANSWIRE, LLC TJW NEW YORK, NY TRANSWORLD NETWORK CORP (PREV LONDON TELECOM SAI TAMPA, FL NETWORK ) TRANSWORLD NETWORK INC. TRJ RICHARDSON, TX TRANS-WORLD TELECOM AMERICA, INC. TWJ LAGUNA HILLS, CA TRANSWORLD TELECOM, LLC TDB NEW YORK, NY TRAVELERS TELECOM CORPORATION TVO SEWELL, NJ TRAVELPHONE CORP INC TPN TRAVELTEL INC TVL SALT LAKE CITY, UT TRAVERSE ANSWERING SERVICE TVA TRAVERSE CTY, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 8–207 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TRAVIS TELECOM TVS AUSTIN, TX TRC TELECOM RCE KERRVILLE, TX TREAS RESOURCES INTL. CORP./DBA TRI TIU COEUR D’ALENE, ID COMMUNICATIONS NETWORK TREASURE COMMUNICATION CO TRR TREASURE COMMUNICATIONS TRU TREASURE STATE MOBILE PHONE INC TUY BUTTE, MT TREETOP ENTERPRISES TRE TREMCOM INTERNATIONAL RML LOS ANGELES, CA TRENTON TELEPHONE COMPANY WBG TRENTON, GA TRESCOM PUERTO RICO (PREV PUERTO RICO PRT SAN JUAN, PR TELEPHONE) TRESCOM U.S.A., INC.(PREV. TOTAL TIO FT. LAUDERDALE, FL TELECOMMUNICATIONS INC) TRESCOM U.S.A., INC.(PREV. TRESCOM INTERNATIONAL, STJ FT. LAUDERDALE, FL CARIBBEAN DIV) TREXNET TRX TRI COUNTY MOBILFONE TCM TRI COUNTY TELEPHONE ASSOCIATION, INC. RYA COUNCIL GROVE, KS TRI RURAL INDEPENDENT OPERATIONS, L.L.C. DBA TRIO, RUR NEW WINDSOR, IL L.L.C. TRI TEL COMMUNICATIONS (FMLY TMC OF EL PASO) TEP EL PASO, TX TRI TEL, INC. TKR BASIN, WY TRIAD CELLULAR TDU MENLO PARK, CA TRIANGLE COMMUNICATION SYSTEM, INC. TUE HAVRE, MT TRIBAL ONE BROADBAND TECHNOLOGIES, LLC DBA ROB NORTHBEND, OR ORCA COMMUNICATIONS TRI-CITIES COMMUNICATIONS INC TQR BINGHAMTON, NY TRI-CITIES TELEPHONE CO TCT TRI-CITY MOBILE PHONE CO TML TRI-COM TRM BELLINGHAM, WA TRICOM MOBILE PAGING, INC. RMP CARROLTON, KY TRICOM USA INC TQY JERSEY CITY, NJ TRICOM USA, INC (PREV (DOMTEL COMM, INC DBA TVD NEW YORK CITY, NY TRICOM INTERNATIONAL) TRI-COMM SYSTEMS TRN TAHLEQUAH, OK TRI-COUNTY COMMUNICATIONS TUN TALLAHASSEE, FL TRI-COUNTY COMMUNICATIONS, INC. TYU STRUM, WI TRI-COUNTY COMMUNICATIONS, INC. (NC) RIY BELHAVEN, NC TRI-COUNTY LONG DISTANCE TYD EVERTON, AR

Proprietary — Licensed Material See proprietary restrictions on title page. 8–208 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TRI-COUNTY TELEPHONE CO INC TNY NEW RICHMOND, IN TRI-M COMMUNICATIONS, INC. DBA TMC RIM SANTA BARBARA, CA COMMUNICATIONS TRINET TIR CORNELIA, GA TRINITY INTERNATIONAL, INC. TYI CORONA, NY TRINITY TELECOMMUNICATIONS CORP TTC TRINITY VALLEY SERVICES INC VYS ATHENS, TX TRIPLE CROWN INDUSTRY TIY SANTA ANA, CA TRIPLE S MOBILPHONE INC TMP TRI-STAR COMMUNICATIONS TUI BAKER, MT TRISTAR COMMUNICATIONS INC TRQ SAN FRANCISCO, CA TRISTATE BELL INC RSB BROOKLYN, NY TRISTATE COMMUNICATIONS TELEPHONE COMPANY, RIZ CONSHOHOCKEN, PA INC. TRI-STATE PAGING INC TZI FAYETTESVILLE, AR TRI-STATE PAGING INC TZR CANOM, CA TRI-STATE PAGING LIMITED TPL TRITEL COMMUNICATIONS INC TYB RIDGELAND, MS TRI-TEL COMMUNICATIONS, INC RTZ NEW YORK, NY TRITEL COMMUNICATIONS, INC. TQU SAN DIEGO, CA TRITON CELLULAR PARTNERS OF FERRY LLC TJP WENATCHEE, WA TRITON COMMUNICATIONS L.L.C. TJK RICHARDSON, TX TRITON COMMUNICATIONS OF TEXAS L.L.C. TFX ABILENE, TX TRITON PCS, INCORPORATED TZV RICHMOND, VA TRIUMPH COMMUNICATIONS & FIBER SERVICES INC. TFI NEW YORK, NY TRIVERGENT COMMUNICATIONS, INC (SUB OF STATE SAU GREENVILLE, SC COMM.) TRM COMMUNICATIONS INC TUZ LONGVIEW, TX TRT INTERNATIONAL CORP TRZ WASHINGTON, DC TRT TELECOMMUNICATIONS CORP TRT TRUCOM CORPORATION TJF NEW YORK, NY TRUCOMM CORPORATION INCORPORATED RUM BUFFALO GROVE, IL TRUE AMERICA COMMUNICATIONS (PREV TELAMERICA TQF SAN FRANCISCO, CA CORP) TRULY CLEAR COMMUNICATIONS RUA DETROIT, MI TRX, INC. XRT OELWEIN, IA TSACONAS CELLULAR TNR BOWLING GREEN, KY TSC COMMUNICATIONS, INC TUO WAPAKONETA, OH TSI INC TII COLUMBIA, SC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–209 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location TSI TELECOMMUNICATION SERVICES INC. EUV TAMPA, FL TSS DIGITAL SERVICES, L.L.C. SSG OLYMPIA, WA TSUNAMI NETWORKS, INC. UMW NEW YORK, NY TTE OF NEW JERSEY TJY CHERRY HILL, NJ TUCCI COMMUNICATIONS, LLC. UIM CALABASAS, CA TUCK DATA COMMUNICATION TUK NEW CUMBERLAND, PA TULAROSA COMMUNICATIONS, INC. ULO TULAROSA, NM TULSA CELLULAR TELEPHONE COMPANY TUL TULSA, OK TULSA COMMUNICATIONS SERVICE TUA TULSA, OK TUSCARAWAS LONG DISTANCE SERVICE TUS NEW PHILA, OH TV BINGO NETWORK, INC. TVB TULSA, OK TW COMMUNICATIONS, INC. D/B/A TWC TWG COSTA MESA, CA TW WIRELESS, L.L.C. TJB DENVER, CO TWC COMMUNICATIONS INC. WCW EDISON, NJ TWIN CITIES COMMUNICATIONS TBW MIDLAND, TX TWIN CITY BEEPERS INC TCB TWIN LAKES TELEPHONE COOPERATIVE CORPORATION TBD GAINESBORO, TN TWIN RIVERS VALLEY TELEPHONE, INC. WVY LIVERMORE, IA TWIN VALLEY TELEPHONE, INC. WVA MILTONVALE, KS TWISTER COMMUNICATIONS NETWORK INC TKZ CONROE, TX TWIX-TEL TWX SOMERVILLE, MD TWO-WAY RADIO COMMUNICATIONS TWR TWO-WAY RADIO COMMUNICATIONS CO OF KANSAS INC TZW LIBERAL, KS TWO-WAY RADIO INC TWO WYTHEVILLE, VA TWO-WAY RADIO OF CAROLINAS INC TWY TWO-WAY SYSTEMS SERVICE TYT FAIRMONT, WV TXU COMMUNICATIONS TELECOM SERVICES CO DBA TXU TYJ LUFKIN, TX COMMUNICATIONS TYLER NET TYN TYLER, TX TYMNET INC TYM T-ZAK WIRELESS, INC DBA TALK NOW USA LKW N CHARLESTON, SC U MOBILFONE SIS U S ACCESS UAC COLORADO SPGS, CO U S AUTOMOBILE ASSOCIATION SATELLITE UAS COMMUNICATIONS U S BANCORP USB PORTLAND, OR U S CENTRAL TELECOMMUNICATIONS CORP UCT HOUSTON, TX U S COMMUNICATIONS UCQ COMPTON, CA U S FIBERCOM UZF DESOTA, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–210 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location U S FIBEROPTICS INC USF BARRINGTOM, IL U S NET INC USZ SPRINGFIELD, MO U S OF KENTUCKY USK U S VOICE MAIL USV DETRIOT, MI U S WEST BROADBAND SERVICES, INC. UWB DENVER, CO U S WEST COMMUNICATIONS INC UWC DENVER, CO U S WEST COMMUNICATIONS INTERCONNECT SERVICES UWI MINNEAPOLIS, MN U S WEST COMMUNICATIONS, WIRELESS UWW DENVER, CO U S WEST INTERPRISE AMERICA (PREV INTERPRISE INA DENVER, CO NETWORK. SERVICES) U S WEST LONG DISTANCE INC (PREV W.K.P. INC) WKP DENVER, CO U S WEST MEDIA GROUP, INC. UWM ENGLEWOOD, CO U S WEST SERVICE LINK INC USW OMAHA, NE U SPEAK LONG DISTANCE UPK HURST, TX U.S. AMERITEL UAL SCHAUMBURG, IL U.S. BILLING (PREV. U.S. LONG DISTANCE) ULD SAN ANTONIO, TX U.S. CONNECT, LLC. UCK LOUISVILLE, KY U.S. DATA HIGHWAY CORPORATION UDH PLEASANTON, CA U.S. LONG DISTANCE, INC ULI SAN ANTONIO, TX U.S. METRO LINE SERVICES, INC. UMV GARLAND, TX U.S. OPERATORS (TEXAS) UOE SAN ANTONIO, TX U.S. ROBOTICS URB SKOKIE, IL U.S. SOUTH COMMUNICATIONS, INC. UOC ATLANTA, GA U.S. TEL CORPORATION UEC FISHERS, IN U.S. TELCO, INC. UEI IRVING, TX U.S. TELECOM LONG DISTANCE INC(PREV CORPORATE OPA LAS VEGAS, NV CALLING SERVICES) U.S. TELEFONE HOLDING COMPANY INC DBA U.S. UHD ALTA LOMA, CA TELEFONE, INC. U.S. TELESERVICES, INC. USU FAIRFAX, VA U.S. VOICE TELEMANAGEMENT UVT MILL VALLEY, CA U2 COMMUNICATIONS, INC. UOU JACKSONVILLE, FL UBIQUITEL OPERATING COMPANY UBQ SPOKANE, WA UI LONG DISTANCE, INC. UIL STANDISH, ME UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS UBT ROOSEVELT, UT UINTAH BASIN LONG DISTANCE UBL ROOSEVELT, UT UKI COMMUNICATIONS, INC. UKI LAS VEGAS, NV ULTIMATE HOME TELEPHONE SERVICE UHT EAST ORANGE, NJ ULTRA CELLULAR, INC. ULR LAWNDALE, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–211 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ULTRA COMMUNICATIONS ASSOCIATION UCA ALEXANDRIA, VA ULTRATELCOM INC ULT CULVER CITY, CA UM COMMUNICATIONS, INC. UMO PALO ALTO, CA UMB BANK, N.A. UBN KANSAS CITY, MO UNI COMMUNICATIONS INC UNZ OAKLAND, CA UNI STAR SATELLITE COMMUNICATION UNR UNICALL COMMUNICATIONS INCORPORATED UMU NEW YORK, NY UNICOM COMMUNICATIONS, L.L.C. UIO FT. LAUDERDALE, FL UNICOM PAGING NETWORK INC UPN HOUSTON, TX UNICOM, INC. UIC ANCHORAGE, AK UNIFIED TELECOMMUNICATIONS SERVICES OF ST LOUIS UFI ST CHARLES, MO INC UNINET UNN DETROIT, MI UNION CARBIDE CORP UCB DANBURY, CT UNION COMMUNICATIONS UNM MONROE, NC UNION COUNTY PROSECUTORS OFFICE UCP ELIZABETH, NJ UNION PACIFIC TECHNOLOGIES UPT OMANA, NE UNION SPRINGS TELEPHONE CO UOS MONTGOMERY, AL UNION TELEPHONE CO UTT MOUNTAIN VIEW, WY UNION TELEPHONE COMPANY UIP FARMINGTON, NH UNION-WALLOWA TELEPHONE, LLC UNW LA GRANDE, OR UNIPLEX TELECOM TECHNOLOGIES INC UPX FT LAUDERDALE, FL UNISOURCE CARRIER SERVICES UCR WALLISELLEN, SZ UNISYS UYS MISSION VIEJO, CA UNISYS CORP UIS BLUE BELL, PA UNITED ARTISTS OPERATOR SERVICES CORP UAT DENVER, CO UNITED BANK OF DENVER UBD DENVER, CO UNITED CARRIER SERVICES INC UCS ST CHARLES, MO UNITED CELLULAR & PAGING, INC. UCE BRONX, NY UNITED COMMUNICATIONS (FMLY PROTO-CALL CORP) PCL PORTLAND, OR UNITED COMMUNICATIONS ASSOCIATION, INC. UCI DODGE CITY, KS UNITED COMMUNICATIONS HUB, INC. UCH WEST HILLS, CA UNITED COMMUNICATIONS INC UCM NEW CONCORD, OH UNITED COMMUNICATIONS SYSTEMS, INC. UCY CHICAGO, IL UNITED GROUP LTD UGR MIAMI, FL UNITED INTERMOUNTAIN TELEPHONE CO UIT UNITED L D S UDS OLNEY, IL UNITED MOBILE NETWORK UMN LONGVIEW, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–212 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location UNITED NATIVE AMERICAN TELECOMMUNICATIONS UNA BELLINGHAM, WA UNITED NETWORK SERVICE INC OF DALLAS UNS UNITED PAC PAC REL INS UPP UNITED PUBLISHERS CORPORATION UPU EL SEGUNDO, CA UNITED RADIOTELEPHONE URT UNITED REFINING COMPANY UFC WARREN, PA UNITED SERVICES ADMINISTRATION USA UNITED STATES ADVANCED NETWORK INC UNK NORCROSS, GA UNITED STATES CELLULAR UCU CHICAGO, IL UNITED STATES CELLULAR CORP CLO TULSA, OK UNITED STATES CELLULAR MOBILE TELEPHONE UMT VANCOUVER, WA NETWORK UNITED STATES DEPT. OF AGRICULTURE UAG FORT COLLINS, CO UNITED STATES GOVERNMENT GOV UNITED STATES TELECOMMUNICATIONS, INC. UDO TAMPA, FL UNITED STATES TELEPHONE CO UPC UNITED STATES TRANSMISSION CORP UTP UNITED SYSTEMS ACCESS TELECOM, INC. UYA KENNEBUNK, ME UNITED TECHNOLOGICAL SYSTEMS DBA UNI-TEL INC. UTG DALLAS, TX UNITED TECHNOLOGICAL SYSTEMS,INC (PREV CARRIER CIP DALLAS, TX CONCEPTS INTL CORP UNITED TEL COMMUNICATIONS, INC. UTM MIAMI, FL UNITED TELE - SYSTEMS ULY COLONIAL HEIGHTS, VA UNITED TELECOM COMMUNICATIONS INC UTL UNITED TELECOM, INC. UEM ALANSON, MI UNITED TELECOM, LLC UED GREAT NECK, NY UNITED TELECOMMUNICATIONS & TECHNOLOGIES, INC. UTB COLUMBUS, OH UNITED TELECOMMUNICATIONS INC UDM LIVONIA, MI UNITED TELEMANAGEMENT CORPORATION UTO DAYTON, OH UNITED TELEMANAGEMENT SERVICES, INC. ULS NEW YORK, NY UNITED TELENET UDT UNITED TELEPHONE LONG DISTANCE (OHIO) ULG MANSFIELD, OH UNITED TELEPHONE OF AMERICA UTZ BALA CYNWYD, PA UNITED TELEPHONE OF FLORIDA UTF ALTAMONTE SPRINGS, FL UNITED TELEPHONE-NORTH CENTRAL (SPRINT) SNQ MANSFIELD, OH UNITED TELESERVICES UZT INDUSTRIAL AIRPORT, KS UNITED TELESPECTRUM INC UTS KANSAS CITY, MO UNITED TELESPECTRUM OF INDIANA UTI UNITED TELNET SYSTEMS UTN ARCADIA, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–213 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location UNITED WATS, INC. UDE MISSION, KS UNITED-KUC, INC. UKU ANCHORAGE, AK UNITEL (UNIVERSAL TEL NETWORK INC) UNE AUSTIN, TX UNITEL COMMUNICATIONS (OKLAHOMA) UNO OKLAHOMA CITY, OK UNITEL GLOBAL COMMUNICATIONS INC UGC OKLAHOMA CITY, OK UNI-TEL OF AMERICA INC UEP EL PASO, TX UNITEL OF CLAREMORE UNI UNI-TEL OF EL PASO VLP EL PASO, TX UNI-TEL OF FARMINGTON INC UNT FARMINGTON, NM UNITEL WIRELESS COMMUNICATIONS SYSTEMS UWN EGG HARBOR TWP, NJ UNITY CELLULAR SYSTEMS INC UNY UNITY, ME UNIVANCE TELECOMMUNICATIONS, INC (PREV CSI SIP ENGLEWOOD, CO CORP) UNIVERSAL ACCESS, INC. UVA CHICAGO, IL UNIVERSAL BROADBAND COMMUNICATIONS, INC. UBR IRVINE, CA UNIVERSAL COMMUNICATIONS NETWORK, INC. UVM CARSON, CA UNIVERSAL COMMUNICATIONS SYSTEMS INC USC UNIVERSAL INFORMATION SERVICES, INC. UIV TUSTIN, CA UNIVERSAL LONG DISTANCE INC (SEE ACCESS UVS LAWTON, OK UNLIMITED-AEU) UNIVERSAL LONG DISTANCE, INC.(PREV. NATIONAL NQT NEW YORK, NY COMM. ASSOC. INC) UNIVERSAL NETWORK COMMUNICATIONS CO UVL UNIVERSAL PACIFIC COMMUNICATIONS, INC., DBA CAL CXP ENCINO, CA PACIFIC COMM. UNIVERSAL SERVICES UVV ELIZABETHTON, TN UNIVERSAL STANDARD MEDICAL LABORATORIES INC UMD SOUTHFIELD, MI UNIVERSAL TELECOM, INC. UEE LAGRANGE, KY UNIVERSAL TELECOMMUNICATIONS INC UNU CORVALLIS, OR UNIVERSAL TELEPHONE & TELEGRAPH, LLC(PREV GST KINNELON, NJ GARDEN ST LONG DIS TEL) UNIVERSAL TELEPHONE SYSTEMS UTY SEATTLE, WA UNIVERSALCOM INC UVN DESTIN, FL UNIVERSITY COMMUNICATIONS INC (PREV UNICOM INC) UNC COLLEGE STATION, TX UNIVERSITY HOSPITAL UVY AUGUSTA, GA UNIVERSITY OF CALIFORNIA SANTA BARBARA UVE SANTA BARBARA, CA UNIVERSITY OF DAYTON INC (THE) UOD DAYTON, OH UNIVERSITY OF PITTSBURGH UOP PITTSBURGH, PA UNIVERSITY OF TENNESSEE AT KNOXVILLE UKV KNOXVILLE, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–214 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location UNIVERSITY OF UTAH UTH SALT LAKE CITY, UT UNIVERSITY TELEPHONE SERVICES UTV COLLEGE STATION, TX UNLIMITED COMMUNICATION SERVICE LLC UCV TRENTON, NJ U-PAGE, INC UPA BINGHAMTON, NY UPPER RIO GRANDE NEIGHBORHOOD TELECOM, INC URG ALAMOSA, CA UPSTATE CELLULAR NETWORK ULN ROCHESTER, NY UPSTATE PAGING, INC. UPS PLATTSBURGH, NY URBAN COMMUNICATIONS TRANSPORT CORPORATION UAP NEW YORK, NY URBAN MEDIA URD PALO ALTO, CA URBAN MEDIA COMMUNICATIONS CORPORATION URM PALO ALTO, CA URBAN MEDIA LONG DISTANCE, INC. UMG PALO ALTO, CA URJET BACKBONE NETWORK UJB LOS ANGELES, CA URSUS TELECOM CORPORATION URS SUNRISE, FL US ADVANCED NETWORK UAN NORCROSS, GA US ADVANTAGE LONG DISTANCE INC UAV AUSTIN, TX US AMERICALL INC UAM SHERMAN OAKS, CA US AVE-TEL, INC. UAB ARLINGTON HEIGHTS, IL US BUYING GROUP, INC. (PREV. TELEVOX PUBLIC TXV ALSIP, IL COMMUNICATIONS INC) US CONNECT CORP USJ MIDDLETOWN, NJ US DATANET CORPORATION UDA SYRACUSE, NY US ELECTRODYNAMICS INC USE BREWSTER, WA US FIBERCOM NETWORK INC UFB NEW YORK, NY US FIBERLINE COMMUNICATIONS INC UFL SAN DIEGO, CA US LEC OF NORTH CAROLINA L.L.C. UHC CHARLOTTE, NC US MOBILE SERVICES, INC. UMS ANNAPOLIS, MD US ONE COMMUNICATIONS CORP. UOM FRISCO, TX US OPERATOR INC USO CALVERTON, MD US ORDER UOR HERNDON, VA US ORIRIS CORP ORS DALLAS, TX US PAYPHONE INC UPY SALT LAKE CITY, UT US TELECOMM INC USQ GREAT NECK, NY US TELEMANAGEMENT NETWORK INC USN PHOENIX, AZ US WEST LONG DISTANCE, INC. (PREV WKP, INC) BEY DENVER, CO US XCHANGE OF WISCONSIN L.L.C. UXW GRAND RAPIDS, MI USA CALLING UCG ATLANTA, GA USA DIGITAL, INC. DBA USA DIGITAL OF NEVADA, INC. UDL FT. LAUDERDALE, FL USA LINK, P.L. D/B/A USA GLOBAL LINK UGL FAIRFIELD, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–215 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location USA LONG DISTANCE USG CORPUS CHRISTI, TX USA MOBILE (PREV. PROFESSIONAL COMMUNICATIONS PRF CINCINNATI, OH INC.) USA MOBILE COMMUNICATIONS INC USM CINCINNATI, OH USA MOBILE COMMUNICATIONS INC II UWH WARRENSVILLE HEIGHTS, OH USA MOBILE COMMUNICATIONS INC II (INDIANAPOLIS) UMB INDIANAPOLIS, IN USA MOBILE COMMUNICATIONS INC II (LOUISVILLE) UML LOUISVILLE, KY USA PAGING UPG KEARNEY, NE USA PHONE 1, INC UPH WATERTOWN, NY USA QUICK PHONE, INC. UQP BRIDGEPORT, TX USA SOFT-TRONIK CORPORATION UOT SAN FRANCISCO, CA USA TELEPHONE INC UAI MIAMI, FL USAIR USR WASHINGTON, DC USAIR COMMUNICATIONS UAR WINSTON-SALEM, 91 USA-SATCO CO USS SAN ANTONIO, TX USBG, INC. UAA ALSIP, IL USC COMMUNICATIONS INC UCC DALLAS, TX USC MEDFORD PAGING UMF MEDFORD, OR USCARRIER TELECOM, LLC (PREV GEORGIA GIR ATLANTA, GA INDEPENDENT TELCO GROUP LLC) USCOM TELEPHONE, INC. UOI CORPUS CHRISTI, TX USCOMNET UZC PROVIDENCE, RI USE IAC CODE COC MHP DALLAS, TX USE IAC CODE CPV OPO BELLEVILLE, NJ USE IAC CODE PRT PUR SAN JUAN, PR USE IAC CODE COC HIL NEW YORK, NY USE IAC CODE COC RRC CHICAGO, IL USE IAC CODE CRC OSW LAS VEGAS, NV USE IAC CODE DTC LSC SOUTHFIELD, MI USE IAC CODE ECI EBR BRANSON, MO USE IAC CODE EKW XNT HOUSTON, TX USE IAC CODE EQN CGR HOUSTON, TX USE IAC CODE ILO CSY NEW BRAUNFELS, TX USE IAC CODE ILO ICH DALLAS, TX USE IAC CODE NPA NPI EL SEGUNDO, CA USE IAC CODE OSO ODP DALLAS, TX USE IAC CODE PFI PXF FOLSOM, CA USE IAC CODE PGN CHM HAYWARD, CA USE IAC CODE TMU FNS SALT LAKE CITY, UT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–216 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location USE IAC CODE TZB AAZ FORT LEE, NJ USE IAC CODE TZB APT FORT LEE, NJ USE IAC CODE TZB SHP FORT LEE, NJ USE IAC CODE AJP AFP O, FL USE IAC CODE ARZ PWT STOCKTON, CA USE IAC CODE AXL AEG LOS ANGELES, CA USE IAC CODE BLX NYX BOSTON, MA USE IAC CODE BNY MSW SCHAUMBURG, IL USE IAC CODE CJI CXJ IRVIN, CA USE IAC CODE COC ACY USE IAC CODE COC ANQ DALLAS, TX USE IAC CODE DTC GRC SOUTHFIELD, MI USE IAC CODE EQN HER HOUSTON, TX USE IAC CODE EQN SOW HOUSTON, TX USE IAC CODE EWC MUM MORGANTOWN, WV USE IAC CODE FAL FAT MIAMI, FL USE IAC CODE GCF GNX COSTA MESS, CA USE IAC CODE GMT CEX DAVENPORT, IA USE IAC CODE GTP GTF THOUSAND OAKS, CA USE IAC CODE HWC FCR SCHAUMBURG, IL USE IAC CODE HWC FVL SCHAUMBURG, GA USE IAC CODE HWC MKN FREDERICK, MD USE IAC CODE HWC OCX SCHAUMBURG, IL USE IAC CODE HWC VCR SCHAUMBURG, IL USE IAC CODE IBM IBS WHITE PLAINS, NY USE IAC CODE ICS ICR USE IAC CODE ILO ILK COVINGTON, GA USE IAC CODE IMR IMC AUSTIN, TX USE IAC CODE INA UIA DENVER, CO USE IAC CODE INC IMT ANAHEIM, CA USE IAC CODE IOR MLS DES MOINES, IA USE IAC CODE IOX SWB WITCHITA, KS USE IAC CODE IOX VLW LONGVIEW, TX USE IAC CODE ITA DHC ATLANTA, GA USE IAC CODE KMM KMK DULUTH, GA USE IAC CODE KMM KMT DULUTH, GA USE IAC CODE LGF LGS FORT LAUDERDALE, FL USE IAC CODE LYN DFT FREDONIA, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–217 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location USE IAC CODE MAF FNA TULSA, OK USE IAC CODE MDW NDW WICHITA, KS USE IAC CODE MXN MBY WINENPEG, CN USE IAC CODE NTI NTW DENVER, CO USE IAC CODE ONR ITG DALLAS, TX USE IAC CODE PWT PWE STOCKTON, CA USE IAC CODE QCC TBG BOWLING GN, KY USE IAC CODE SNB SGV SAN DIEGO, CA USE IAC CODE SNB SNA SAN DIEGO, CA USE IAC CODE SRN STX NORTH YORK, ON USE IAC CODE SVU UCL DES MOINES, IA USE IAC CODE TIA NKS BOCA RATON, FL USE IAC CODE TZB ACP FORT LEE, NJ USE IAC CODE TZB SDP FORT LEE, NJ USE IAC CODE TZB TDY FORT LEE, NJ USE IAC CODE USX SVV SEATTLE, WA USE IAC CODE UTC GSP OVERLAND PARK, KS USE IAC CODE UTC ISA OVERLAND PARK, KS USE IAC CODE UTC LCF SAN RAFAEL, CA USE IAC CODE UTC LDU USE IAC CODE UTC SPC USE IAC CODE WIN WTG PITTSBURG, PA USE IAC CODE WUA TDD CEDAR RAPIDS, IA USE IAC CODE ANK DCG BOCA RATON, FL USE IAC CODE AOW AOS USE IAC CODE ATS AWX MEMPHIS, TN USE IAC CODE ATZ XXX PHILADELPHIA, PA USE IAC CODE BAX NYC ARLINGTON, VA USE IAC CODE BNK VAD IRVING, TX USE IAC CODE BNY CDU DULUTH, MN USE IAC CODE CCV CDH ANDOVER, MA USE IAC CODE CEJ GSL ROSWELL, GA USE IAC CODE CJI CXF OKLAHOMA CITY, OK USE IAC CODE CUY CUF NEPTUNE, NJ USE IAC CODE EBA BAM USE IAC CODE EBA VRZ SOUTHFIELD, MI USE IAC CODE GBN GBT CHICAGO, IL USE IAC CODE GMT CRR ROCKFORD, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–218 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location USE IAC CODE IBI VPL BURLINGTON, MA USE IAC CODE IOR CDN ST LOUIS, MO USE IAC CODE IOX FTL BRANDON, SD USE IAC CODE ITT UST USE IAC CODE MFF MUD NEWARK, NJ USE IAC CODE MID MIT USE IAC CODE ONM CAY ENGLEWOOD, CO USE IAC CODE PWT ZAK STOCKTON, CA USE IAC CODE SNB SAO SAN DIEGO, CA USE IAC CODE TED TDA GRAND RAPIDS, MI USE IAC CODE TGH PZS EVANSVILLE, IN USE IAC CODE TIM TWK ENGLEWOOD, CO USE IAC CODE TJP BUE WALLA WALLA, WA USE IAC CODE TJP DLA USE IAC CODE TQW IUT SALT LAKE CITY, UT USE IAC CODE TZB ANP FORT LEE, NJ USE IAC CODE TZB APU FORT LEE, NJ USE IAC CODE TZB APW FORT LEE, NJ USE IAC CODE TZB TRP FORT LEE, NJ USE IAC CODE TZB TST FORT LEE, NJ USE IAC CODE UTC SUA KANSAS CITY, MO USE IAC CODE UTC TLN OREM, UT USE IAC CODE UTC TNU BOSTON, MA USE IAC CODE UTC USP SHAWNEE MISSION, KS USE IAC CODE FED SUS TULSAIX, OK USE IAC CODE DTC TDQ TOLEDO, OH USE IAC CODE ICG TDL ENGLEWOOD, CO USE IAC CODE QRV CZU JACKSON, MS USHMAN COMMUNICATIONS COMPANY UCO SPRINGFIELD, IL USLINK LONG DISTANCE USL PEQUOT LAKES, MN USN COMMUNICATIONS(PREV. UNITED TELECOM OF UTK CHICAGO, IL AMERICA, INC.) USP&C, INC. (PREV. FUTURECOM, INC.) FTM KANSAS CITY, MO USP&C, INC. (PREV. INFO ACCESS) IFA KANSAS CITY, MO USTEL/ARCADA (PREV USTEL) USX SEATTLE, WA USTELENET UTU PLAINVIEW, NY USWEST NEW VECTOR GROUP INC DBA AIR TOUCH UNV BELLEVUE, WA CELLULAR U-TALK CORPORATION ULK SUGAR LAND, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–219 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location U-TALK SERVICES UKS CHICAGO, IL UTC LONG DISTANCE, LLC UTX CHAPEL HILL, TN UTE COMMUNICATIONS UTE UTEL-CALL ULL MONROE, WI UTELCO INC ULC MONROE, WI UTEX COMMUNICATIONS CORP. UEO AUSTIN, TX UTICA/ROME CELLULAR TELEPHONE UTR UTICA, NY UTILICOM NETWORKS UTW FRANKLIN, MA UTILICORE CORPORATION ULP SARASOTA, FL UTILITY SOURCE, INC (PREV WBC COMMUNICATIONS, WBM LAS VEGAS, NV INC) UTILITY SOLUTIONS UYO ROCHESTER, NY UTILITY TELEPHONE, INC. UYT STOCKTON, CA UUNET TECHNOLOGIES, INC. UUN FAIRFAX, VA UV CORP UVC HUTCHINSON, KS V C F, INC - VALLEY COMMUNICATIONS VAY SALEM, VA V.I.P. BILLING AND COLLECTION SERVICES, INC. VBC TIMONIUM, MD VACATION VILLAGES OF AMERICA INC VVA PORTLAND, OR VACNET VET PLANO, TX VAIL COMMUNICATIONS INC(DBA EGM 1994) VLC AVON, CO VAIL SYSTEMS INC VIL BUFFALO GROVE, IL VALCOM INC VCM VAL-ED JOINT VENTURE L.L.P. VED PERHAM, MN VALENCE COMMUNICATIONS SERVICES LTD VCO DALLAS, TX VALLEY ANSWERING SERVICE VAS VALLEY COMMUNICATIONS VLE MOSES LAKE, WA VALLEY INDUSTRIAL COMMUNICATIONS SALES, INC. VYI REDDING, CA VALLEY INSTANT PAGE VIP SACRAMENTO, CA VALLEY LINK COMMUNICATIONS VYL BOISE, ID VALLEY MOBILE COMMUNICATIONS INC VMC LANCASTER, CA VALLEY PAGING VPG VALLEY PAGING CO VLY VALLEY STAR TEL VST HARLINGEN, TX VALLEY TELECOMMUNICATIONS CO VEY SIERRA VISTA, AZ VALLEY TELEPHONE CO., INC. VTV LANETTE, AL VALLEY TELEPHONE LONG DISTANCE VTD RAYMONDVILLE, TX VALLEY WATS VYW HARLINGEN, TX VALLEY YELLOW PAGES VYP FRESNO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–220 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location VALLEYNET VYN WAYNESBORO, VA VALNET VNT FRESNO, CA VALOR TELECOMMUNICATIONS CLEC OF OKLAHOMA, VOK IRVING, TX LLC VALOR TELECOMMUNICATIONS CLEC OF TEXAS, LP VTX IRVING, TX VALOR TELECOMMUNICATIONS SOUTHWEST, LLC VLO IRVING, TX VALOR TELECOMMUNICATIONS, LD, LLC. VAU IRVING, TX VALSTAR, INC VAR GERMANTOWN, NY VALU COMMUNICATIONS OF HUTCHINSON INC VCH HUTCHINSON, KS VALU COMMUNICATIONS OF LAWRENCE INC VCL LAWRENCE, KS VALUE ADDED COMMUNICATIONS VAC OAKBROOK TERACE, IL VALUE LINE OF ALBUQUERQUE (NEW NAME SVC) VAA VALUE LINE OF ALEXANDRIA VLA VALUE LINE OF BRAZOSPORT VLB VALUE LINE OF EAST TEXAS (NEW CODE CAL) VAL VALUE LINE OF GREENVILLE VGR VALUE LINE OF LUBBOCK VOL VALUE LINE OF NEW BRAUNFELS (NEW NAME CML) VLN VALUE LINE OF SOUTH TEXAS VLS VALUE LINE OF ST JOSEPH’SVSJ VALUE LINE OF TEMPLE VLT VALUE LINE OF TRI-CITIES VTC VALUE LINE OF TYLER VYT VALUE LINE OF WEST TEXAS VOT TERMINAL, TX VALUE LINE OF WITCHITA FALLS VWF TEMPLE, TX VALUE TEL VLU NAPERVILLE, IL VALUELINX COMMUNICATIONS CORPORATION VLX GREENWOOD, AR VALULINE COMMUNICATIONS, INC. VUE AUSTIN, TX VALULINE LONG DISTANCE (PREV. CACTUS DIGITAL, CDX ALBUQUERQUE, NM INC.) VALULINE LONG DISTANCE (PREV. REAMS REM ALBUQUERQUE, NM COMMUNICATIONS, INC.) VALU-LINE OF ANGLETON VUA LAKE JACKSON, TX VALU-LINE OF LOUISIANA VLL LONGVIEW, TX VALU-LINE OF SOUTHEAST TEXAS VSE BEAUMOUNT, TX VALUTEL COMMUNICATIONS, INC. VCU AUSTIN, TX VANCOUVER TELEPHONE COMPANY LTD. VTP VANCOUVER, BC VANGUARD CELLULAR SYSTEMS INC VGD GREENSBORO, NC VANGUARD TELECOM CORP. VTE GREENSBORO, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 8–221 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location VANILLA INC. VNA OAKTON, VA VANION TELECOM, INC. VAN COLORADO SPRINGS, CO VANTEK COMMUNICATIONS VTK SIOUX FALLS, SD VARIAN CANADA VRC BUFFALO, NY VARMICON INDUSTRIES INC VRM HARLINGEN, TX VARTEC VRT DESOTA, TX VARTEC TELECOM DBA CLEAR CHOICE(PREV. CLEAR CMJ LANCASTER, TX CHOICE COMMUNICATIONS VARTEC TELECOM INC(PREV. U.S. REPUBLIC URC DALLAS, TX COMMUNICATIONS, INC) VARTEC TELECOM, INC (PREV METROTEL LONG MZL LANCASTER, TX DISTANCE) VARTEC TELECOM, INC (SEE URC) TPU RICHARDSON, TX VAST-TEL COMMUNICATIONS, INC VTT BRIDGEPORT, TX VAULTAIRE WIRELESS VAW KNOXVILLE, TN VBI 2000 LLC VBT RIDGELAND, MS VBI, INC. VBI MILWAUKEE, WI VCOM.COM CORPORATION VOM NEW YORK, NY VCV COMMUNICATIONS, INC. VVV MIAMI, FL VDC TELECOMMUNICATIONS, INC(PREV BLUE SKY BSK AURORA, CO TELECOMMUNICATIONS INC) VDL INC. DBA GLOBAL TELECOM BROKERS GTR OWINGS MILLS, MD VECTOR COMMUNICATIONS VEC VECTRIS TELECOM, INC (PREV VECTRIS COMM.) VUN AUSTIN, TX VELCERO, LLC VEL MORRESTOWN, NJ VELOCITY NETWORKS OF KENTUCKY, INC. VNK INDEPENDENCE, MO VELOCITY TELEPHONE INC VTH NEW BRIGHTON, MN VENSER INC VSR HATO REY, PR VENTURA CELLULAR VRA CAMARILLO, CA VENTURE COMMUNICATIONS CORP VNC ROCHESTER, NY VENTURES IN PAGING VTS OKLAHONA CITY, OK VENUS TELEPHONE CORPORATION VNP VENUS, PA VERA LONG DISTANCE VLD LAREDO, TX VERDI SOUNDS VRD KENNEDALE, TX VERIO INC VER ENGLEWOOD, CO VERIZON ADVANCED DATA - VIRGINIA INC. VDG NEW YORK, NY VERIZON ADVANCED DATA INC (PREV BELL ATLANTIC BNK NEW YORK, NY NETWORK DATA, INC) VERIZON AVENUE CORP (PREV VENTURES IN COMM. VEN HERNDON, VA RMTS LLC DBA ONEPOINT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–222 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location VERIZON CALIFORNIA, INC (PREV GENERAL TELEPHONE GTP PLANO, TX CO) VERIZON DELAWARE INC (PREV BELL ATLANTIC- BND PHILADELPHIA, PA DEL,INC) VERIZON GLOBAL SOLUTION INC. VGS LIBERTY CORNER, NJ VERIZON MARYLAND INC (PREV BELL ATLANTIC-MD,INC) BNM BALTIMORE, MD VERIZON NETWORK INTEGRATION CORP(PREV BELL BNI FRAZER, PA ATLANTIC NTW INTEGRAT) VERIZON NEW ENGLAND INC (PREV NEW ENGLAND NEG BOSTON, MA TELEPHONE) VERIZON NEW JERSEY INC (PREV BELL ATLANTIC-NJ,INC) BNJ NEWARK, NJ VERIZON NORTHWEST INC. VZN EVERETT, WA VERIZON PENNSYLVANIA INC (PREV BELL ATLANTIC- BNP PHILADELPHIA, PA PA,INC) VERIZON SELECT SERVICES INC (PREV GTE GOP IRVING, TX COMMUNICATIONS CORP) VERIZON SELECT SERVICES INC (PREV GTE CZQ VICTORVILLE, CA COMMUNICATIONS CORP) VERIZON SELECT SERVICES INC (PREV GTE GIN IRVING, TX COMMUNICATIONS CORP) VERIZON SOUTH INC. VRO DURHAM, NC VERIZON VIRGINIA INC (PREV BELL ATLANTIC-VA,INC) BNA RICHMOND, VA VERIZON WASHINGTON DC INC (PREV BELL ATLANTIC- BNH WASHINGTON, DC WASH,DC,INC) VERIZON WEST VIRGINIA INC (PREV BELL ATLANTIC- BNW CHARLESTON, WV WVA,INC VERMONT AMERICAN VAM LOUISVILLE, KY VERNON COMMUNICATION & T.V., INC. VCV SIOUX CENTER, IA VERNON COMMUNICATIONS, LLC. VEO WESTBY, WI VERNON TELEPHONE COMPANY VRN VERNON, NY VERSATEL INCORPORATED VRS CASPER, WY VERTEX GROUP INC. VGN LOS ANGELES, CA VF COMMUNICATIONS, INC (PREV PINNACLE PTV VIRGINIA BEACH, VA TELECOMM., OF VA , INC) VIANET VAE SUDBURY, ON VIATEL SERVICES, INC. (PREV DESTIA COMMUNICATIONS EPH CHESTERFIELD, MO SERVICES, INC) VIATEL, INC. VAT OMAHA, NE VICKI COWAN DBA TEL-A-VOICE VCT VICOM INC VIC EDEN PRAIRIE, MN VICTORIA CELLULAR CORP VTR VICTORIA, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–223 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location VIDEOTRON TELECOM LTEE VID MONTREAL, CA VIDEOTRON TELECOM LTEE (PREV VERTELCO INC) VTL MONTREAL, PQ VIGAR ENTERPRISES INC DBA COMMUNICATION VGE LAREDO, TX SERVICES VIKING COMMUNICATIONS, INC. VKI MORRISVILLE, PA VILLAGE TELEPHONE, INC VGT NEWCASTLE, WA VILLAGE UTILITY, INC. VUL WHEELING, IL VINCENNES TELEPHONE ANSWERING SERVICE INC VTA VINCENT COMMUNICATIONS INC VCI FRESNO, CA VINELAND MOBILE TELCO VMT VIP CONNECTIONS VPC HONOLULU, HA VIP ENTERPRISES INC VPP KIRKSVILLE, MO VIRGIN ISLANDS TELE-COM VIT ST THOMAS, VI VIRGINIA METROTEL VGM GLEN ALLEN, VA VIRGINIA NETWORK INCORPORATED VNE MARION, VA VIRGINIA PCS ALLIANCE, L.C. VPA WAYNESBORO, VA VIRTUAL HIPSTER CORPORATION VHC FALLON, NV VIRTUAL NETWORK SYSTEM VTU OAKBROOK, KY VIRTUAL TECH, INC. VUH BLACKSBURG, VA VISA USA INC VUS SAN FRANCISCO, CA VISTA GROUP INTERNATIONAL VGI CHARDON, OH VISTA UNITED TELECOMMUNICATIONS VUT LAKE BUENAVISTA, FL VITAL VTQ WAYNESBORO, VA VITAL COMMUNICATION VIA MARSHFIELD, WI VITAL PROCESSING SERVICES, L.L.C. VPS PHOENIX, AZ VITCOM CORPORATION VTO NEW YORK, NY VITERIS, INC. VIR DUNCANVILLE, TX VITTS CORPORATION VIS MANCHESTER, NH VIVA TEL LONG DISTANCE VVI HURST, TX VIVO-TN, LLC. VTN BIRMINGHAM, MI VNS TELECOM, LLC. VXS CANOGA PARK, CA VOCALL COMMUNICATIONS CORP. VLM MOUNTAINSIDE, NJ VOICE CONNECTIONS, INC. VIE NAPLES, FL VOICE INTERACTIVE PRODUCTIONS INC VEI MIAMI, FL VOICE NET COMMUNICATIONS SYSTEMS INC DBA VOICE- VNY BRONX, NY TEL OF NEW YORK VOICE NET, INC. VNI FORT SMITH, AR VOICE NETWORKS, INC. VNW STERLING, CO VOICE POWER TELECOMMUNICATIONS, INC. VPT AUSTIN, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 8–224 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location VOICE RETRIEVAL & INFORMATION SERVICES INC VRI CARROLLTON, TX VOICE TELECOMM.,INC DBA VOICE-TEL OF EASTERN VCC HARTSDALE, NY NEW YORK STATE VOICE TRACK VRK DALLAS, TX VOICE VISION INTERNATIONAL INC. VOV LOS ANGELES, CA VOICE WARE SYSTEMS VWS WEST PALM BEACH, FL VOICELINK, INC. VLI NORCROSS, GA VOICESTREAM NATIONAL NETWORKS VNN BELLEVUE, WA VOICESTREAM WIRELESS CORPORATION (PREV WCG BELLEVUE, WA WESTERN WIRLESS CORP DBA VOICE-TEL VOC LEXINGTON, KY VOICETEL COMMUNICATIONS INC. VOE WEST ORANGE, NJ VOICE-TEL OF CENTRAL OKLAHOMA RGB OKLAHOMA CITY, OK VOLCANO TELEPHONE CO VCN PINE GROVE, CA VOLT INFORMATION SCIENCES, INC. VLF ORANGE, CA VOLUNTEER WIRELESS INC VWI COOKEVILLE, TN VORTEX NETWORK, INC. VXN CONROE, TX VOXPATH NETWORKS INC VPI AUSTIN, TX VOYAGER COMMUNICATIONS VOY WHITE PLAINS, NY VPS COMMUNICATIONS, INC VPM RICHMOND, VA VR TELECOMMUNICATIONS, INC. VRU AVON, CO VRS BILLING SYSTEMS VSL SAN JOSE, CA VSYS VSY COLORADO SPRINGS, CO VT OF LONG ISLAND INC. VTI BRONX, NY VTA INC CIS BETHSEDA, MD VTG, INC. DBA VOICE-TEL OF HOUSTON VTG HOUSTON, TX VYVX TELECOM INC (NOW WILTEL - WTL) HNI HOUSTON, TX W C COMMUNICATIONS WCM W K COMMUNICATIONS INC WKC OVERLAND PARK, KS WABASH INDEPENDENT NETWORKS, INC. WHI LOUISVILLE, IL WACO COMMUNICATIONS INC WAC WADENA LONG DISTANCE WAD BEMIDJI, MN WAKUL, INC. WUL CINCINNATI, OH WALLER BROADCASTING WBC WALNUT COMMUNICATIONS, INC NUT WALNUT, IA WALNUT HILL CELLULAR INC WNH LEWISVILLE, AK WALNUT HILL TELEPHONE COMPANY WHO LEWISVILLE, AR WALTER R MORRIS MD WRM WAMNET COMMUNICATIONS INC WAE BOCA RATON, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–225 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WANG COMMUNICATIONS CORP WNG ENGLEWOOD, CO WANG INFORMATION SERVICE CORP WNS LOWELL, MA WANTEL INC WNL ROSEBURG, OR W-ARK MOBILE PHONE AND PAGE WMP WARREN COUNTY TELECOMMUNICATIONS DEPT. WAR LEBANON, OH WARSUN INTERNATIONAL COMMUNICATIONS CORP. WIU VIENNA, VA WARWICK VALLEY LONG DISTANCE CO INC WVL WARWICK, NY WASHINGTON COUNTY JOINT VENTURE WCJ ALTOONA, PA WASHINGTON INTERNATIONAL TELEPORT WIT WASHINGTON, DC WASHINGTON OREGON WIRELESS, LLC. WOW STAYTON, OR WASHINGTON TELEPHONE CO WTT PRINCE FRED, MD WASHINGTON WATER POWER WWP WASHINGTON/BALTIMORE HIGH INTENSITY DRUG WBH GREENBELT, MD TRAFFICKING AREA WATS AMERICA SOUTHEAST WSE BIRMINGHAM, AL WATS INTERNATIONAL CORPORATION WIQ CHERRRY HILL, NJ WATS NETWORK OF TEXAS WNT SAN ANTONIO, TX WATS(WIDE AMERICA TELECOM SYSTEMS OF PORTLAND) WAP WATS/800 INCORPORATED WTZ ORLANDO, FL WATTS AMERICA WTA WAUNETA TELEPHONE COMPANY WTY BENKELMAN, NE WAUSAU LONG DISTANCE WLD WAUSAU, WI WAVECOMM WVM WEST LEBANON, NH WAVERLY HALL TELEPHONE CO., INC. WVH WAVERLY HALL, GA WAVESENT, LLC. WVS BOISE, ID WAVETEL, L.L.C. WAV HUNTERSVLLE, NC WAYNE PAGING WYN SAN ANTONIO, TX WCI CABLE INC WIB ANCHORAGE, AK WCTA LONG DISTANCE CO (SUB OF WINNEBAGO WGO LAKE MILLS, IA COOPERATIVE TELE. ASSOC.) WE CONNECT COMMUNICATIONS, INC. WEU PITTSBURGH, PA WEATHERSPOON TELEPHONE LLC WHP VANCOUVER, WA WEB FIRE COMMUNICATIONS INC DBA WEB FIRE LONG WBF WICHITA FALLS, TX DISTANCE WEBNET COMMUNICATIONS, INC. WEB MCLEAN, VA WEBSERVE, INC. WER CHARLOTTE, NC WEBSHOPPE COMMUNICATIONS, INC. WEH ALEXANDER CITY, AL WEBSTER RADIO WBS FRESNO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–226 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WEBSTER-CALHOUN LONG DISTANCE (PREV WEBSTER- WCH GOWRIE, IA CALHOUN COOPERATIVE) WEBTEL WIRELESS INC WBL PRESCOTT VALLEY, AZ WEBVALLEY, INC WEV HOPKINS, MN WEEKS COMMUNICATIONS, INC. WEK ABILENE, TX WELLS FARGO ALARM SERVICES, INC. WFA OMAHA, NE WELLS FARGO BANK WFB SAN FRANCISCO, CA WESCOM DATA TELEPHONE WDT NEWPORT BH, CA WESCOM DATA TELEPHONE WGS NEWPORT BH, CA WEST ALABAMA COMMUNICATIONS WAL WEST CAROLINA COMMUNICATIONS, LLC WLO ABBEVILLE, SC WEST CENTRAL CELLULAR WCN SAN ANGELO, TX WEST CENTRAL CELLULAR - LIMITED PARTNERSHIP WCL APPLETON, WI WEST CENTRAL PAGERS WCP WEST COAST COMMUNICATIONS INC WCC SANTA BARBARA, CA WEST COAST PCS LLC WEP ROSEVILLE, CA WEST COAST TELECOMMUNICATIONS,INC WCU SANTA BARBARA, CA WEST FLORIDA COMMUNICATION WEC WEST GEORGIA PAGING WGP WEST IOWA TELEPHONE COMPANY WIW REMSEN, IA WEST KENTUCKY NETWORKS INC WKN MAYFIELD, KY WEST KENTUCKY TWO-WAY RADIO INC WKT WEST MOUNTAIN MOBILE WMM WEST RIVER LONG DISTANCE WVD HAZEN, ND WEST TENNESSEE TELEPHONE COMPANY, INC. WNE BRADFORD, TN WEST TEXAS COMMUNICATIONS WEX AMARILLO, TX WEST TEXAS MICROWAVE WTM AUTIN, TX WEST TEXAS RURAL TELEPHONE WRU HEREFORD, TX WEST VIRGINIA CELLTELL CO WVC GREENSBORO, NC WEST VIRGINIA ONE NONWIRELINE CELLULAR LIMITED WVO ROSWELL, GA PARTNERSHIP WEST WISCONSIN COMMUNICATION SYSTEMS, INC. WSW DOWNSVILLE, WI WESTAR TELECOMMUNICATIONS WSR THOUSAND OAKS, CA WESTCHESTER MOBILE FONE SYSTEMS INC WMF WESTCOAST ASSOCIATES INC. WSA RAHWAY, NJ WESTCOL WSL WESTCOL RADIO PAGING WRP WEST-COL RADIO PAGING INC WRA GRAND JUNCTION, CO WESTCOM CORPORATION WSM NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 8–227 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WESTCOM INC WCO SAN ANTONIO, TX WESTEL INC WES WESTEL TELECOMMUNICATIONS LTD WSD NORTH VANCOUVER, BC WESTELCOM NETWORK, INC. WNW WESTPORT, NY WESTERN 6 MOTELS WEM WESTERN AMERICAN TELEPHONE WAM WESTERN COMMUNICATIONS WNC WESTERN COMMUNICATIONS PAGING, LLC WOP SAN ANTONIO, TX WESTERN COMMUNICATIONS, INC. WEO RAPID CITY, SD WESTERN EXPRESS COMMUNICATIONS INC WTE WESTLAKE VG, CA WESTERN INTEGRATED NETWORKS OF CALIFORNIA WIM DENVER, CO OPERATING LLC WESTERN INTEGRATED NETWORKS OF TEXAS WXO DALLAS, TX OPERATING L.P. WESTERN LONG DISTANCE, INC. WLA LANGLEY, WA WESTERN OKLAHOMA INFORMATION SYSTEMS WOI CLINTON, OK WESTERN PACIFIC TELECOM INC WPT INCLINE VILLAGE, NV WESTERN RADIO COMMUNICATIONS WRC WESTERN RADIO SERVICES CO INC WRS WESTERN SYSTEMS INC WSY IGANA, GU WESTERN TELECOM INC WTI WESTERN TELECOM INC WTK HOUSTON, TX WESTERN TELECOMMUNICATIONS CO WET CARLSBAD, CA WESTERN TELECOMMUNICATIONS INC WTC WESTERN TELECOMMUNICATIONS INC(PREV. WESTERN WIS DENVER, CO INFORMATION SYSTEMS) WESTERN TELE-COMMUNICATIONS, INC. WTU ENGLEWOOD, CO WESTERN TELENET WST ABILENE, TX WESTERN TELEPAGE WTP WESTERN TELEPHONE & TELECOMMUNICATIONS WTN CARSON CITY, NV WESTERN TELEPHONE & TELEVISION WTV RIVERSIDE, CA WESTERN TELEPHONE INTEGRATED COMMUNICATIONS, WTD MEDFORD, OR INC. WESTERN TELEPHONE SERVICE INC WTS WESTERN TOTAL COMMUNICATIONS WTO SCOTTSBLUFF, NE WESTERN UNION CORP WUC UPPER SADDLE RIVER, NJ WESTERN UNION INTERNATIONAL WUI WESTERN WIRELESS COMMUNICATIONS, INC (PREV ALL ASQ SAN LUIS OBISPO, CA STATE PAGING)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–228 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WESTERN WIRELESS CORPORATION PCF BELLEVUE, WA WESTEX CELLULAR WTX STANTON, TX WES-TEX TELECOMMUNICATIONS, INC. WEA STANTON, TX WESTGATE COMMUNICATIONS, L.L.C. WGT BREWSTER, WA WESTSIDE COMMUNICATION OF TAMPA WCT WESTSIDE PAGING INC WSP ABERDEEN, WA WESTSTAR WIRELESS COMMUNICATIONS, INC (PREV ELS SAN LUIS OBISPO, CA ELECTRONIC LEASING) WESTSTAR WIRELESS COMMUNICATIONS, INC (PREV. PGL SAN LUIS OBISPO, CA PAGECALL INC) WESTWAVE COMMUNICATIONS WWC SANTA ROSA, CA WESTWOOD TRUCKING LLC WWT OPELOUSA, LA WETEC LLC WEE PARK RAPIDS, MN WEYMOUTH SERVICE WYS SOUTH WEYMOUTH, MA WGK RADIO WGK GRANITE CITY, IL WH LINK, LLC WHN ANNANDALE, MN WHATCOM TELECOMM WHM FERNDALE, WA WHEAT STATE TELEPHONE, INC. WHH UDALL, KS WHEELER COMMUNICATIONS WHL BLOOMINGTON, IL WHELLING CELLULAR TELEPHONE CO WLG PITTSBURGH, PA WHEREVER.NET USA INC. WHR LOS ANGELES, CA WHISLER COMMUNICATIONS WHS OLYMPIA, WA WHITMAN COLLEGE WHT WALLA WALLA, WA WHO EVER (PREV. LUDWIG) LWG KENNEDALE, TX WHOLESALE AIRTIME, INC WHA TEMECULA, CA WHOLESALE COMMUNICATIONS WLL HOUSTON, TX WHOLESALE TELECOM CORPORATION WLM CORAL GABLES, FL WICHITA CHEAP TALK WHC WICHITA, KS WICHITA FALLS CELLULAR TELEPHONE CO WFC WICHITA FALLS, TX WICOMICO COUNTY MARYLAND DEPARTMENT OF WCD SALISBURY, MD CORRECTIONS WIDE AMERICA TELECOM SYSTEMS WAS WIDEOPENWEST ILLINOIS, LLC. WDI NAPERVILLE, IL WIDEOPENWEST MICHIGAN, LLC. WMI NAPPERVILLE, IL WIDEOPENWEST OHIO, LLC. WOH NAPERVILLE, IL WIESE INC WIE WIKI WIKI TELECOM, INC. WIK WASHOUGAL, WA WILCOX COMMUNICATIONS WXC WILES COMMUNICATION SERVICE WCS BILLINGS, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 8–229 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WILEY COMMUNICATIONS INC WIL WILKES COMMUNICATIONS, INC DBA WILKES LONG WKS WASHINGTON, GA DISTANCE SERVICE WILKES LONG DISTANCE, INC. WLN MILLERS CREEK, NC WILLAMETTE VALLEY TELECOM SERVICES WVT LEBANON, OR WILLIAMS & COMPANY COMMUNICATIONS, INC. WLY SIOUX CITY, IA WILLIAMS COMMUNICATIONS LLC (WHOLLY OWNED SUB WCA TULSA, OK WILLIAMS COM GROUP) WILLIAMS COMMUNICATIONS, LLC (PREV WILLIAMS NVN TULSA, OK COMMUN, INC) WILLIAMS METRO COMMUNICATIONS WMC WILLIAMSPORT MOBILE TELE CO WMT WILMINGTON CELLULAR TELEPHONE CO WMG ATLANTIC CITY, NJ WILSAVE, INC WLV CHICAGO, IL WILSON COMMUNICATION COMPANY, INC. WSU WILSON, KS WILSON, ROBERT L. JR. DBA EXPRESS EUN ARLINGTON, TX TELECOMMUNICATIONS WILTEL COMMUNICATIONS SYSTEMS INC WLT TAMPA, FL WILTON LONG DISTANCE WGD WILTON, NH WILTON TELEPHONE COMPANY WON WILTON, IA WINCO, INC. WNO WINCHESTER, IL WINDY CITY BEEPER, INC. WCB CHICAGO, IL WINGATE COMMUNICATIONS CORP WGE BELMONT, MA WINGS COMMUNICATIONS, INC. WIG CHICAGO, IL WINSOME PAGING INC WIP BAYONNE, NJ WINSTAR (PREV WINSTAR TELECOMMUNICATIONS INC) WSQ TYSONS CORNER, VA WINSTAR WIRELESS, INC. WNR FALLS CHURCH, VA WINSTAR(PREV. COMMUNICATIONS GATEWAY NETWORK CGW TYSONS CORNER, VA INC) WIREGRASS TELCOM, INC. WGR DOTHAN, AL WIRELESS ACCESS NETWORK, INC. WWK FORT MYERS, FL WIRELESS ALLIANCE, LLC WAN ALEXANDRIA, MN WIRELESS COMMUNICATIONS VENTURE WMV WAITE PARK, MN WIRELESS II, L.L.C. WIR GRAND ISLAND, NB WIRELESS NORTH, INC. WNN PLYMOUTH, MN WIRELESS ONE NETWORK, L.P. WOS FT MYERS, FL WIRELESS USA, INC WLU SAN DIEGO, CA WIRELESS, LP DBA INDEPENDENT WIRELESS ONE WSO WASHINGTON, DC CORPORATION WIRELESSCO, LP WEL KANSAS CITY, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 8–230 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WIRELESSPLUS, INC. WPI HAYWARD, CA WIRLESS SYSTEMS TECHNOLOGY WSH DANVILLE, AR WISCONSIN BELL INC WBI MILWAUKEE, WI WISCONSIN COMMUNICATIONS NETWORK, INC WOO MILWAUKEE, WI WISCONSIN INDEPENDENT NETWORK, LLC. WNK EAU CLAIRE, WI WISCONSIN LDS (INVALID CODE CO ACCQUIRED BY TGN) BVD SHEBOYGAN, WI WISCONSIN RSA #1 -LIMITED PARTNERSHIP WRO APPLETON, WI WISCONSIN RSA #10 - LIMITED PARTNERSHIP WRN GREEN BAY, WI WISCONSIN RSA #2 - PARTNERSHIP WRT APPLETON, WI WISCONSIN RSA #3 - LIMITED PARTNERSHIP WTR APPLETON, WI WISCONSIN RSA #4 - LIMITED PARTNERSHIP WRF GREEN BAY, WI WISCONSIN RSA #6 - PARTNERSHIP WSX APPLETON, WI WISCONSIN RSA #7 - LIMITED PARTNERSHIP WSS APPLETON, WI WISCONSIN TELECOMMUNICATIONS TECH INC (INVALID WTH JAMESVILLE, WI SEE SCH) WISPRA NETWORKS INC. WPN ST. LAURENT, CN WISTERIA LD SERVICE WSI NORTH CHARLSTON, SC WITHERS COMMUNICATIONS WSC WITTENBERG CABLE TV COMPANY, INC WCV WITTENBERG, WI WIZTRONICS, INC. WZT BELLINGHAM, WA WJG TELEPHONE CO WJG WKH CORP WKH WLKI FM 100 WLK ANGOLA, IN WOLD COMMUNICATIONS INC WCI WOLPOFF & ABRAMSON WPA BETHESDA, MD WOMAN’S INTERNATIONAL LONG DISTANCE, INC. WIO SAN ANTONIO, TX WOODWARD COMMUNICATIONS INC WWD WOOF COMMUNICATIONS DBA A C T AAT PRESCOTT, AZ WORCESTER COMMUNICATIONS WCR WORKING ASSETS WRK SAN FRANCISCO, CA WORKING ASSETS FUNDING SERVICES WFS SAN FRANCISCO, CA WORKNET COMMUNICATIONS, INC. WUN CLAYTON, MO WORLAND SERVICES WDS WORLAND, WY WORLAND SERVICES WSV WORLD ACCESS COMMUNICATIONS CORP. (PREV. TSI TIX MIAMI, FL TELECOM. SVC. INC.) WORLD BUSINESS CENTER, INC. WBU MIAMI, FL WORLD CALL INTERNATIONAL INC WLC TAMPA, FL WORLD DISCOUNT TELECOMMUNICATIONS INC WDU CHICAGO, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 8–231 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WORLD LYNX, L.L.C. WLX LITTLE ROCK, AR WORLD NETWORK COMMUNICATIONS, INC. WNM HUNTINGON BEACH, CA WORLD ONE TELECOMMUNICATIONS WDO LOS ANGELES, CA WORLD PASS COMMUNICATIONS, CORPORATION WPC MIAMI, FL WORLD SAVINGS AND LOAN WSG OAKLAND, CA WORLD TELECOM GROUP, INC. DBA AMERIVOX WLI MOUNTAINSIDE, CA WORLD TELECOMMUNICATIONS SERVICES,INC. WRV MIAMI, FL WORLD TELECOMMUNICATIONS, INC WOU TAMPA, FL WORLD TOUCH, INC. WRH BELLEVUE, WA WORLD WIDE CONNECT, INC. WDW BROOKLYN, NY WORLD WIDE DEVELOPMENT, INC. WWE ASHLAND, KY WORLD WIDE TELE-TRANS COMPANY WWR BENTONVILLE, AK WORLD WINDOW WRW DALLAS, TX WORLDCALL COMMUNICATIONS INTERNATIONAL, INC. WCE YONKERS, NY WORLDCOM FED TULSA, OK WORLDCOM (PREV TRI-TEL COMMUNICATIONS) TIQ MUNSTER, IN WORLDCOM INC WDM SAN JUAN, PR WORLDCOM INC (PREV ENVOY GLOBAL INC) EGI PORTLAND, OR WORLDCOM INC (PREV JARTEL INC) JRL SAN DIEGO, CA WORLDCOM INC (PREV THRIFTY TELE EX DBA OHIO TFY TULSA, OK DIGITAL ACCESS) WORLDCOM INC (PREV. LDDS) CDD TULSA, OK WORLDCOM INC (PREV. TARGET TELECOM INC) TAG TULSA, OK WORLDCOM INC(PREV PRIMELINK COMMUNICATIONS) CBA COLUMBIA, MO WORLDCOM INC(PREV SECURITEX DBA TYLERNET LONG TYR BEDFORD, TX DISTANCE) WORLDCOM INC(PREV TEL-AMERICA NETWORK TNW BEDFORD, TX SERVICES INC) WORLDCOM INC(PREV TEL-LEASING) TSG CHICAGO, IL WORLDCOM INC. ( PREV. LDDS) TNC TULSA, OK WORLDCOM INC. (LDDS) TFB TULSA, OK WORLDCOM INC. (PREV VISTA INTERNATIONAL VIN FLANDERS, NJ COMMUNICATIONS INC) WORLDCOM INC. (PREV. LDDS DBA AMERICALL SYSTEMS ALU TULSA, OK OF LOUISVILLE) WORLDCOM INC. (PREV. LDDS DBA FIRST PHONE OF NEW FNE TULSA, OK ENGLAND) WORLDCOM INC. (PREV. LDDS DBA TMC OF SOUTHWEST TGR TULSA, OK FLORIDA) WORLDCOM INC. (PREV. LDDS) ADG TULSA, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 8–232 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WORLDCOM INC. (PREV. LDDS) ALS TULSA, OK WORLDCOM INC. (PREV. LDDS) ANI TULSA, OK WORLDCOM INC. (PREV. LDDS) APC TULSA, OK WORLDCOM INC. (PREV. LDDS) API TULSA, OK WORLDCOM INC. (PREV. LDDS) BML TULSA, OK WORLDCOM INC. (PREV. LDDS) CNO TULSA, OK WORLDCOM INC. (PREV. LDDS) COK TULSA, OK WORLDCOM INC. (PREV. LDDS) CYT TULSA, OK WORLDCOM INC. (PREV. LDDS) ELE TULSA, OK WORLDCOM INC. (PREV. LDDS) ICT TULSA, OK WORLDCOM INC. (PREV. LDDS) ITT TULSA, OK WORLDCOM INC. (PREV. LDDS) LCI TULSA, OK WORLDCOM INC. (PREV. LDDS) LDD TULSA, OK WORLDCOM INC. (PREV. LDDS) LDL TULSA, OK WORLDCOM INC. (PREV. LDDS) LDS TULSA, OK WORLDCOM INC. (PREV. LDDS) LSY TULSA, OK WORLDCOM INC. (PREV. LDDS) MAL TULSA, OK WORLDCOM INC. (PREV. LDDS) MEC TULSA, OK WORLDCOM INC. (PREV. LDDS) MIC TULSA, OK WORLDCOM INC. (PREV. LDDS) MLG TULSA, OK WORLDCOM INC. (PREV. LDDS) MTD TULSA, OK WORLDCOM INC. (PREV. LDDS) NAS TULSA, OK WORLDCOM INC. (PREV. LDDS) NTV TULSA, OK WORLDCOM INC. (PREV. LDDS) SAN TULSA, OK WORLDCOM INC. (PREV. LDDS) SNC TULSA, OK WORLDCOM INC. (PREV. LDDS) TET TULSA, OK WORLDCOM INC. (PREV. LDDS) TNO TULSA, OK WORLDCOM INC. (PREV. LDDS) TOM TULSA, OK WORLDCOM INC. (PREV. LDDS) TOR TULSA, OK WORLDCOM INC. (PREV. LDDS) TRI TULSA, OK WORLDCOM INC. (PREV. LDDS) TSF TULSA, OK WORLDCOM INC. (PREV. LDDS) TTM TULSA, OK WORLDCOM INC. (PREV. LDDS) TXO TULSA, OK WORLDCOM INC. (PREV. LDDS) UEL TULSA, OK WORLDCOM INC. (PREV. METROMEDIA ANW TULSA, OK COMMUNICATIONS CORP. - SNC) WORLDCOM INC. (PREV. METROMEDIA ATE TULSA, OK COMMUNICATIONS CORP.-SNC)

Proprietary — Licensed Material See proprietary restrictions on title page. 8–233 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WORLDCOM INC. (PREV. TELECOLUMBUS, USA DBA WDC TULSA, OK WORLDCOM) WORLDCOM INC. (PREV. TOUCH-1) TUH TULSA, OK WORLDCOM INC. (PREV. WILTEL) WTL TULSA, OK WORLDCOM INC. DBA TOUCH ONE LONG DISTANCE(PREV TOA TULSA, OK TOUCH 1 AMERICA) WORLDCOM INC.(PREV. LDDS/WORLDCOM) DNI JACKSON, MS WORLDCOM INC.(PREV. LDDS/WORLDCOM) IPC TULSA, OK WORLDCOM INC.(PREV. LDDS/WORLDCOM) NWS TULSA, OK WORLDCOM TECHNOLOGIES (PREV MFS INTELENET, MFZ OMAHA, NE INC.) WORLDCOM, INC(PREV CALL US INC) CUI KNOXVILLE, TN WORLDCOM, INC(PREV MERSURY LONG DISTANCE) MCY WORLDCOM, INC(PREV NETWORK TELEMANAGEMENT NTK BOISE, ID SERVICES INC) WORLDCOM, INC(PREV TEXAS NATIONAL TELECOMS CML NEW BRAUNFELS, TX INC) WORLDDIAL NETWORK SERVICES CORP. WDL OKLAHOMA CITY, OK WORLDHUB, LLC WUB WEST PALM BEACH, FL WORLDLINK LONG DISTANCE CORP. WKL MIAMI, FL WORLD-LINK SOLUTIONS, INC. WRI NEW YORK, NY WORLDLINK TECHNOLOGIES, L.L.C. WOT PARSIPPANY, NJ WORLD-LINK, INC. WDK NEW YORK, NY WORLDNET COMMUNICATIONS INC. DBA T M S WLE EAST SYRACUSE, NY WORLDNET SOUTH TEXAS WRX BAY CITY, TX WORLDNET, L.L.C. WOD LAWRENCE, KS WORLDPORT COMMUNICATIONS WLP KENNESAW, GA WORLDSTAR COMMUNICATIONS CORPORATION WOC MIAMI, FL WORLDTEL SERVICES, INC. WRL COSTA MESA, CA WORLDTOUCH COMMUNICATIONS, INC. WUO RICHARDSON, TX WORLDWIDE INTERNET SERVICES, INC. WIV BOCA RATON, FL WORLDWIDE NETWORK SERVICES, INC WEN GAITHERSBURG, MD WORLDWIDE TELCO INC WWI NEW YORK, NY WORLD-WIDE TELCO INC. WWO NEW YORK, NY WORLDXCHANGE CORP (PREV CTS TELCOM OF FLORIDA) CFF MIAMI, FL WORLDXCHANGE CORP (PREV T&S COMMUNICATIONS, TKP SAN RAFAEL, CA LLC) WORLDXCHANGE CORP (PREV WORLDXCHANGE VDT SAN DIEGO, CA COMMUNICATIONS) WORLDXCHANGE CORP (PREV WORLDXCHANGE) CXM SAN DIEGO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 8–234 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location WORLDXCHANGE CORP (PREV WXL COMMUNICATIONS WXL TORONTO, ON LTD) WORTHEIM CO WOR WORTHINGTON LDS WLS WORTHINGTON, MN WR GRACE AND COMPANY WRG NEW YORK, NY WRIGHT AND RUNSTAD WRD WTC COMMUNICATIONS, INC. WTB WAMEGO, KS WTG-CENTRAL INC (NOW WILTEL - WTL) LET CHESTERFLD, MO WTI ADVANTAGE PRODUCTS, LLC. WAU NOVATO, CA WU WORLD COMMUNICATIONS INC (MRG-ITT WORLD ITW HONOLULU, HI COMM & W U CORP) WYLON WYL WYMO-BIG SKY BEEPER WSB WYOCOM, LLC DBA CONTACT COMMUNICATIONS WOM RIVERTON, WY WYOMING MOBILEPHONE WYM WYOMING PINE MTN COMMUNICATIONS WPM WYOMO COMMUNICATIONS WYC X2COMM, INC. DBA DIRECT CONNECT COMMUNICATIONS XCD HILLSBOROUGH, NJ X5 LLC XLL SEATTLE, WA XADAX INC XAD NEW YORK, NY X-CELL CELLULAR INC XCL DENVER, CO XCOM TECHNOLOGIES (LEVEL 3) (PREV XCOM XCT CAMBRIDGE, MA TECHNOLGIES) XDSL NETWORKS, INC. XDS BALTIMORE, MD XEROX CORPORATION XRX STAMFORD, CT XIEX TELECOMMUNICATIONS INC XIX BELLAIRE, TX XILA COMMUNICATIONS, LLC XIL INDIANAPOLIS, IN XIT TELECOMMUNICATION & TECHNOLOGY INC XIT DALHART, TX XIT TELECOMMUNICATION & TECHNOLOGY INC. D/B/A XIC DALHART, TX XIT COMMUNICATIONS X-L COMMUNICATIONS INC XLC SPOKANE, WA XNET, INC. (PREV. BUSINESS CHOICE NETWORK, INC.) BCH VIRGINIA BEACH, VA XO COMMUNICATIONS, INC (PREV NEXTLINK) FBL BALA CYNWYD, PA XO COMMUNICATIONS, INC(PREV NEXTLINK) TQW SPOKANE, WA XO OHIO, INC (PREV NEXTLINK OHIO) NXO COLUMBUS, OH XO PENNSYLVANIA, INC (PREV CHADWICK TELEPHONE) CWV ALLENTOWN, PA XO PENNSYLVANIA, INC (PREV NEXTLINK PENNSYLVANIA PLH READING, PA ) XO TENNESSEE, INC (PREV NEXTLINK TENNESSEE) USH FRANKLIN, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 8–235 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location XPEDITE SYSTEMS, INC. XPS EATONTOWN, NJ XPM INC XPM HORSESHOE BAY, TX XSPEDIUS CORP (PREV LEC UNWIRED LLC) LUW LAKE CHARLES, LA XSPEDIUS CORP (PREV XSPEDIA CORP) XPC LAKE CHARLES, LA XTEL COMMUNICATIONS, INC. XTL MARLTON, NJ XTEL INC XTE HOLLYWOOD, FL XTRACOM, INC XTR CHICAGO, IL XYNERGIA, INC. XYA MIAMI, FL XYPOINT CORPORATION XYP SEATTLE, WA YADKIN VALLEY TELECOM, INC. YAV YADKINVILLE, NC YAK COMMUNICATIONS CANADA INC. YAK TORONTO, ON YAKIMA COUNTY COMMUNICATIONS YCC YAKIMA TAS YTA YALE UNIVERSITY IVY NEW HAVEN, CT YANKEE MICROWAVE INC YNK PORTLAND, ME YASIN’S INC YIN PITTSBURGH, PA YAZOO ANSWER CALL YAC YCOM NETWORKS YCM YELM, WA YEIPOST NETWORK SOLUTIONS LLC YPN STONE MOUNTAIN, GA YELCOT TELEPHONE COMPANY YTC MOUNTIAN HOME, AR YELL COUNTY TELEPHONE COMPANY YET DANVILLE, AR YELLOW PAGER COMMUNICATIONS SYSTEMS YPC S. LAKE TAHOE, CA YES COMMUNICATIONS SERVICES YES SAN JOSE, CA YIPES TRANSMISSION, INC. YPS SAN FRANCISCO, CA YOGAO INC YOG YORKVILLE COMMUNICATIONS, INC. YCI YORKVILLE, TN YOUNG, CHRIS; PASCHALL, LARRY A DBA W TENNESSEE YPW DYERSBURG, TN COMMUNICATIONS YOUNGSTOWN CELLULAR TELEPHONE CO YBG YOUNGSTOWN, OH YOUR CALL GROUP YCG KENNEDALE, TX YOUR LONG DISTANCE CONNECTION YLD MT HOME, AK YUCCA TELECOMMUNICATIONS SYSTEMS, INC YTS PORTALES, NM YUKON-WALTZ TEL CO YWL YUKON, PA YUMA ELECTRONICS INC YEL YUMA RADIO TELEPHONE SVC YRT YUMA, AZ ZAMA NETWORKS, INC. AZJ SEATTLE, WA ZANESVILLE RADIO PHONE (NOT A VALID IAC CODE) ZRP ZCO, INC. OZC DUBLIN, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 8–236 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Company Name

Table 8-1 IAC Codes Sorted by Company Name (Continued)

Company Name Code Headquarters Location ZENEX LONG DISTANCE CJL EDMOND, OK ZENK GROUP, LTD. DBA PLANET ACCESS ENK FENTON, MI ZEPHION NETWORKS COMM. INC (PREV DOMINO DNO FALLS CHURCH, VA NETWORKS COMMUN. INC) ZEPHYR TELECOMMUNICATIONS INC EZR FLORHAM PARK, NJ ZEPTEL EEL DALLAS, TX ZERO PLUS XZP DALLAS, TX ZIMMER WAY MMY FORT WORTH, TX ZIP-CALL INC (NOT A VALID IAC CODE)) ZCL ZIPCOM ZPC LOUISVILLE, KY ZONE TELECOM, INC. EKG CAMBRIDGE, MA Z-TEL COMMUNICATIONS, INC ELZ TAMPA, FL ZTS INC SZT CAPE GIRARDEAU, MO ZULPORES (NOT A VALID IAC CODE) ZPS DALLAS, TX ZUNDEL’S RADIO INC UND POCATELLO, ID

Proprietary — Licensed Material See proprietary restrictions on title page. 8–237 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Company Name

Proprietary — Licensed Material See proprietary restrictions on title page. 8–238 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

9 IAC Codes Sorted by Code Table 9-1 IAC Codes Sorted by Code

Code Company Name Headquarters Location AAA A-ACCURATE ANSWERING SVC CHICAGO, IL AAB ADD-A-BEEPER ADVANCE TELECOM INC AAC ANS-A-PHONE COMMUNICATION INC AAD AMERICAN AUTOMATED TELEPHONE (AAT) DALLAS, TX AAE ADVANCED TELECOM SYSTEMS SAN JOSE, CA AAF ACTION PAGING CORPORATION LOS ANGELES, CA AAG AGT ACCESS GLOBAL TELECOM INC. WEBSTER, MA AAH AMERICAN ALPHA DISPATCH SERVICES INC. FARMINGDALE, NY AAI AMERICAN AIRLINES INC DALLAS, TX AAJ ADS ALLIANCE DATA SYSTEMS, INC. DALLAS, TX AAK ALLTEL COMMUNICATIONS INC(PREV ALLTEL MOBILE COMM - HUDSON, OH ARKANSAS INC) AAL AMERICAN MOBILEPHONE OF ALABAMA AAM ALASCOM (AT&T) ANCORAGE, AK AAN ACME ANSWERING SERVICE AAO ATCALL, INC. ARLINGTON, VA AAP AAA ANSWERPHONE AAQ AA TELECOM AUBURN, CA AAR AARO COMMUNICATIONS AAS AAA ANSWERING SERVICE INC AAT WOOF COMMUNICATIONS DBA A C T PRESCOTT, AZ AAU ANNE ARUNDEL COUNTY ANNAPOLIS, MD AAV AMERITECH ADVANCED DATA SERVICES CHICAGO, IL AAW AAA ANSWERING SERVICE INC AAX AMERITECH AUDIOTEX SERVICES CHICAGO, IL AAY ATLAS COMMUNICATIONS, LTD BLUE BELL, PA AAZ USE IAC CODE TZB FORT LEE, NJ ABA AMERICAN BUSINESS ALLIANCE KINGSTON, PA ABB ANSWER BY BIRKEN ABC AIR BEEP CORPORATION ABD AMERICAN CELLULAR COMMUNICATIONS, INC. TARZANA, CA ABE ECONOLINE BIRMINGHAM, AL ABF ABC TELECOM PALM SPRINGS, CA ABG ALTERNATE BILLING SOLUTIONS LIMITED AUSTIN, TX ABH AIRBANK USA, INC. LOS ANGELES, CA ABI ABL NETWORK INC AUSTIN, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ABJ A-CBT SYSTEM, INC. IRVING, TX ABK AMERICA OF BAKERSFIELD BAKERSFIELD, CA ABL ABLE COMMUNICATIONS ABM ABCOM LOUISVILLE, KY ABN AUSTIN BESTLINE AUSTIN, TX ABO ABCO COMMUNICATIONS GROUP REHNART PARK, CA ABP AIR BEEP ABQ NET-TEL GROUP LLC (PREV. TELESAVER OF NEW MEXICO) RESTON, VA ABR ABRAHAM COMMUNICATIONS INC TAMPA, FL ABS ABILENE-SWEETWATER CELLULAR TEL CO ABILENE, TX ABT ADVANCED BUSINESS TELEPHONE FARGO, ND ABU ASSOCIATED BUSINESS TELEPHONE SYSTEMS BERLIN, NJ ABV CABLE ATLANTIC ST JOHN’S, NF ABW AERIAL COMMUNICATIONS, INC. (PREV. AMERICAN PORTABLE CHICAGO, IL TELECOM) ABX AMERICAN BEEPER CO SCHAUMBURG, IL ABY A BEEP,L.L.C. JOLIET, IL ABZ A B NETWORK AUSTIN, TX ACA AIRCALL OF TEXAS ACB AUTOMOBILE CLUB OF SOUTHERN CALIFORNIA LOS ANGELES, CA ACC ARGO COMMUNICATIONS CORP ACD ADVANCED RADIO COMMUNICATIONS CO ACE ACCESS CODE CORP ACF AIRSIGNAL OF CALIFORNIA ACG AMERICA CALLING INC BELLEVUE, WA ACH AIRSIGNAL INC CHICAGO, IL ACI AIR COURIERS INTERNATIONAL INC ACJ ADVANCED COMMUNICATIONS INC DENISON, TX ACK ADARONDACK CELLULAR TELEPHONE LP FAIRFIELD, CA ACL AIRCALL NY CORP ACM ASSOCIATED COMMUNICATIONS INC ACN AIR COMMUNICATIONS CO ACO AMCOM INC ACP USE IAC CODE TZB FORT LEE, NJ ACQ ALAMO CITY LONG DISTANCE INC SAN ANTONIO, TX ACR AT&T COMMUNICATIONS OF CALIFORNIA INC ACS ANNISTON COMMUNICATIONS SVC ACT ACC LONG DISTANCE CORP ROCHESTER, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ACU ALERT COMMUNICATIONS ACV AMERITECH SERVICES FRAMINGTON, MI ACW AMERICAN COMMUNICATIONS NETWORK NEWPORT BH, CA ACX ALTERNATE COMMUNICATIONS TECHNOLOGY INC INDIANAPOLIS, IN ACY USE IAC CODE COC ACZ ATLANTIC CONNECTIONS LTD TRAVERSE CITY, MI ADA AMERICAN TELEDATA INC DAYTONA, FL ADB AUDITEL, INC NORTH HOLLYWOOD, CA ADC ALLIED COMMUNICATIONS INC ADD ADIRONDACK MOBILE RADIO CO INC ADE AT&T COMMUNICATIONS OF DELAWARE INC ADF ANTI-DEFAMATION ADG WORLDCOM INC. (PREV. LDDS) TULSA, OK ADH ADVANCED MANAGEMENT SERVICES IRVING, TX ADI ADVANCED INMATE TECHNOLOGIES DENVER, CO ADJ ADVANCED LOGIC RESEARCH (DELAWARE), INC. IRVINE, CA ADK ADVANCED TELECOMMUNICATION NETWORK, INC. BELLMAWE, NJ ADL ANDALUSIA RADIO SERVICE ANDALUSIA, AL ADM AMERITECH MOBILE COMMUNICATIONS INC HICKORY HILLS, IL ADN ANDERSON COMCO ADO ALD COMMUNICATIONS SAN MATEO, CA ADP ADVANCED PAGING WALNUT CREEK, CA ADQ NETWORKTWO COMM. GROUP, INC (PREV AUTOMATIC DATA PROC. ANN ARBOR, MI AUTONET) ADR ADIRONDACK RADIO TELEPHONE CO INC ADS AM-TEX DISPATCH SERVICE CO ADT ADVANCED TRANSMISSION SYSTEMS UPPER SADDLE RIVER, NJ ADU ADDVALUE COMMUNICATIONS NOBLESVILLE, IN ADV ASCI’S TELEPHONE EXPRESS NETWORK SAN FRANCISCO, CA ADW ADP COMMUNICATIONS, INC. EL PASO, TX ADX CIERA NETWORK SYSTEMS, INC (PREV EQUALNET CORPORATION) HOUSTON, TX ADY AMADEUS COMMUNICATIONS KENNEDALE, TX ADZ AD/COM AEA ACTIVE ELECTRONICS OSBURN, ID AEB ADVANCED ELECTRONICS (BILLINGS) AEC AURORA/ELGIN CELLULAR TELEPHONE CO INC WEST ATLANTIC CITY, NJ AED ADVANCED PAGING & COMMUNICATIONS SPOKANE, WA AEE AMERICAN EXPRESS EXPRESS PHONE DENVER, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AEF ANDERSON EFFECTS INC MENTONE, CA AEG USE IAC CODE AXL LOS ANGELES, CA AEH AMERICONNECT, INC. OVERLAND PARK, KS AEI AMERI TEL SHERMAN OAKS, CA AEJ ALLTEL COMMUNICATIONS, INC(PREV ALLTEL LONG DISTANCE) LITTLE ROCK, AR AEK ARAMTEL BALTIMORE, MD AEL AMP ELECTRIC INC AEM ALPINE PCS, INC. GAYLORD, MI AEN AIR COMMUNICATIONS OF CENTRAL WISCONSIN INC WISCONSIN RAPIDS, WI AEO ADDCOM ELECTRONICS NORTH SYRACUSE, NY AEP FUTURTEK (AMERICAN COMMUNICATION ENTERPRISE) SAN MATEO, CA AEQ ACCESS-PLUS (NOW TCC COMMUNICATIONS, INC. - TGN) MILWAUKEE, WI AER AEROFONE INC AES ADVANCE ELECTRONICS (SIDNEY) AET AMERICAN TELENET ONTARIO, CA AEU ACCESS UNLIMITED INC LAWTON, OK AEV AMERICAN TELECOMMUNICATIONS CORP (VENTURA) VENTURA, CA AEW AMERICAN TELECOMMUNICATIONS ENTERPRISES SEATTLE, WA AEX AAA ANSWERING SERVICE AND MEDICAL EXCHANGE AEY AMERICAN PERSONAL COMMUNICATIONS BETHESDA, MD AEZ AMCELL KING OF PRUSSIA, PA AFA ADVANCED RADIO COMMUNICATION SERVICES OF FLA., INC. BOCA RATON, FL AFB AMERICAN FIBER COM, INC. WAXAHACHIE, TX AFC ALL FLORIDA COMMUNICATIONS AFD AFFILIATED COMPUTER SYSTEMS INC DALLAS, TX AFE ADVAMTEL LLC DBA PLAN B COMMUN (PREV ADVANCED AMERICAN EATONTOWN, NJ TELECOM) AFF AFFILIATED TELECOM SERVICES INC DUNCANVILLE, TX AFG ASTAC LONG DISTANCE ANCHORAGE, AL AFH ADVANCED TELEPHONE SYSTEMS, INC, DBA HTC COMMUNICATIONS HICKORY, PA AFI AMERICAN FIBERNET, INC. DUNCANVILLE, TX AFJ ATLANTIC.NET BROADBAND, INC. GAINVESVILLE, FL AFK A F KIMMEL AFL AMERICAN FIBERLINE CO SAN ANTONIO, TX AFM ATLANTIC MEDIA, INC. LAUREL, MD AFN NOSVA, L.P. LOS ANGELES, CA AFO AFTCO LINK SYSTEMS INC MIDDLEBURG HEIGHTS, OH AFP USE IAC CODE AJP O, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AFQ AMA TELECOM, INC. AMARILLO, TX AFR AMERICAN INFORMATION NETWORK INC ROLLING MEADOWS, IL AFS ANSWER FORT SMITH INC FORT SMITH, AR AFT AFTON COMMUNICATIONS INC ROANOKE, VA AFU AFN CONSULTANTS, INC OVERLAND PARK, KS AFV AFFORDABLE VOICE COMMUNICATIONS INC LAS CRUCAS, NM AFW AMERICAN FIBER NETWORK, INC. OVERLAND PARK, KS AFX AFX SYSTEMS GREENVALE, NY AFY ALLEGIANCE TELECOM, INC. DALLAS, TX AFZ ALPHA DATA SERVICES INC STATEN ISLAND, NY AGA ADDISON LONG DISTANCE OPERATORS AUSTIN, TX AGB AGR BEEPERS & CELLULARS HIALEAH, FL AGC AMERITEL PAGING INC. APPLETON, WI AGD AMERICAN LONG DISTANCE CO HOUSTON, TX AGE ALGER COMMUNICATIONS GRANDVILLE, MI AGF ANDRIL SERVICE GROUP LAREDO, TX AGG PROGRESSIVE NATIONAL TELEPHONE COMPANY (PREV APPLEGATE) FORT WORTH, TX AGH ADVANTAGE TELECOMMUNICATIONS EDISON, NJ AGI AIR TO GROUND OF IDAHO AGJ ASSOCIATED TELEPHONE DESIGNS, INC. NEW YORK, NY AGK ADVANTAGE COMMUNICATIONS, INC. PARAMUS, NJ AGL ANSWERPHONE OF GOLDSBORO AGM AMERICAN TELEGRAM CORP BEVERLY HILLS, CA AGN AMRIGON ENTERPRISES INC AGO ALLGOOD TAYLOR TELEPHONE PLANO, TX AGP APPROVED GROUP TELECOM KENNEDALE, TX AGQ ANTIGO CALL AMERICA ANTIGO, WI AGR ASSOCIATED GROCERS INC SEATTLE, WA AGS AGEIS CELLULAR GROUP MINNEAPOLIS, MN AGT ALBERTA GOVERNMENT TELEPHONES EDMONTON, AL AGU APPLIED TECHNOLOGY GROUP INC BAKERSFIELD, CA AGV AIRADIGM COMMUNICATIONS, INC. LITLE CHUTE, WI AGW ALL PAGE UTICA, NY AGX ANSARING ST LOUIS, MO AGY ALLEGHENY INTERNATIONAL AGZ AIRSIGNAL OVERLAND PARK, KS AHA ALPHA CELLULAR COLUMBUS, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AHB GLOBALSTAR USA, INC (PREV AIRTOUCH SATELLITE SERVICES US, WALNUT CREEK, CA INC) AHC ALPHA CELLULAR BATON ROUGE, LA AHD AMERITECH MOBILE COMMUNICATIONS INC FOR DETROIT SCHAUMBURG, IL AHE ANISHNABE COMMUNICATIONS ENTERPRISE, INC. MT. PLESANT, MI AHF CASTLEBERRY TELEPHONE COMPANY CASTLEBERRY, AL AHG AIRTOUCH PAGING AUSTIN, TX AHH ANSWER PAGE DALLAS, TX AHI ATCI INC. CANADA HOLDINGS, INC ETOBICOKE, ON AHJ ALPHA MESSAGE CENTER, INC NORTHFIELD, NJ AHK ALPHA PAGING, INC BLACK RIVER, NY AHL ASHLAND CALL AMERICA ASHLAND, WI AHM AMERITECH MOBILE COMMUNICATIONS INC MILWAUKEE, WI AHN AMERIPHONE AUSTIN, TX AHO AMERITECH CELLULAR HOFFMAN ESTATES, IL AHP ANSWERING SERVICE OF HOPKINSVILLE AHQ ATHENA INTERNATIONAL L.L.C. NEW ORLEANS, LA AHR AMFAC HOTELS AND RESORTS INC AHS ATHENS MOBILE PHONE ATHENS, OH AHT ASHTON COMMUNICATIONS CORPORATION CHULA VISTA, CA AHU ARMSTRONG TELEPHONE COMPANY CLINTON, PA AHV APPALACHAN CELLULAR GENERAL PARTNERSHIP HAROLD, KY AHW TELCOM INTERNATIONAL INC. DBA ALPHA TELEPHONE SEA CLIFF, NY AHX AMICA WIRELESS PHONE SERVICE, INC. IOWA CITY, IA AHY ADELPHIA TELECOMMUNICATIONS, INC. COUDERSPORT, PA AHZ AMERITECH PUBLISHING INC TROY, MI AIA ANSWER IOWA AIB A & I DISTRIBUTER BILLINGS, MO AIC AMERICAN INTERSTATE COMMUNICATIONS CORP AID AT&T COMMUNICATIONS OF INDIANA INC AIE AMERICAN INTERNATIONAL TELECOM SAN ANTONIO, TX AIF ATT-IS AIS SYSTEM 1000 SOMERSET, NJ AIG ATLANTIC DIGITAL ANN ARBOR, MI AIH AMERITECH CORP HOFFMAN ESTATES, IL AII AUDIOCOM ELECTRONICS INC SPOKANE, WA AIJ AMERICAN COIN TEL INC LIVERPOOL, NY AIK AIKEN AUGUSTA CELLULAR TEL CO AUGUSTA, GA AIL AIRSIGNAL INTERNATIONAL INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AIM AMERICAN INTERNATIONAL MICROCOMM INC AIN AIRSIGNAL INTERNATIONAL OF PHILADELPHIA PA INC AIO AT&T COMMUNICATIONS OF ILLINOIS INC AIP AIR PAGE - THE BEEPER PEOPLE INC AIQ AMERICAN INMATE COMMUNICATIONS INC SAN ANTONIO, TX AIR AIR CALL AIS AIRSIGNAL INTERNATIONAL INC SPOKANE AIT AMERICAN INTERNATIONAL TELEPHONE SAN FRAN, CA AIU AIRCALL COMMUNICATIONS INC DECATUR, IL AIV ALTERNATIVE NETWORK SERVICES INC SAN MARCOS, TX AIW AMER-I-NET SERVICES CORP FARMINGDALE, NJ AIX AMERICAN INTERNATIONAL TELECOMMUNICATIONS BURLINGTON, VT AIY AMERICALL COMMUNICATIONS CORP HOUSTON, TX AIZ AMERI-TEL COMMUNICATIONS INC NORMAN, OK AJA AEP COMMUNICATIONS, LLC COLUMBUS, OH AJB @MOBILE.COM BELLEVUE, WA AJC ACM, INC. LAS VEGAS, NV AJD ADVANCED DATA COMMUNICATIONS LLC BURLINGAME, CA AJE AENEAS COMMUNICATIONS, LLC JACKSON, TN AJF AERO COMMUNICATIONS, LLC FREEPORT, IL AJG ATLANTIC GATEWAY TELECOM, INC ROYAL PALM BEACH, FL AJH AFFINITY NETWORK INCORPORATED LOS ANGELES, NV AJI ACCESS INTERNATIONAL WESTLAKE VILLAGE, CA AJJ ALTA MUNICIPAL UTILITIES ALTA, IA AJK TA MARKETS, INC. LANSING, MI AJL ASIATEL, INC. SANTA MONICA, CA AJM ACI COMMUNICATIONS INC. SCOTTSDALE, AZ AJN CASSCOM INC ROCHESTER HILLS, MI AJO ALLCOM COMMUNICATIONS, INC. SPRINGDALE, AR AJP ALTERNATIVE PHONE, INC OCALA, FL AJQ ADELPHIA BUSINESS SOLUTIONS OF MAINE, INC. BRIDGEVILLE, PA AJR ARC LONG DISTANCE, INC. DALLAS, TX AJS ASIA ACCESS TELECOM INC LOS ANGELES, CA AJT ATS TELECOMMUNICATIONS SYSTEMS, INC. THE WOODLANDS, TX AJU AUSTIN COMPUTER ENTERPRISES, INC YONKERS, NY AJV AVANA COMMUNICATIONS CORPORATION ATLANTA, GA AJW ANDREW TELECOM INC ORLAND PARK, IL AJX ONETONE TELECOM, INC (PREV TALON COMMUNICATIONS, INC) SENECA, SC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–7 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AJY AT&T COMMUNICATIONS OF NEW JERSEY INC AJZ ASPIRE TELECOM, INC. ASHEVILLE, NC AKA AMERICOM INC WAUKESHA, WI AKB ARKANSAS BLUECROSS BLUESHIELD LITTLE ROCK, AR AKC ARKANSAS COMMUNICATIONS AND ELECTRONICS INC AKD AMERITECH LONG DISTANCE SERVICES HOFFMAN ESTATES, IL AKE AMERICALL INTERNATIONAL, LLC GLENDALE, AZ AKF CAMERON TELEPHONE COMPANY SULPHUR, LA AKG ARKLA LONG DISTANCE ADVANTAGE SHREVEPORT, LA AKH ARKANSAS DEPARTMENT OF HUMAN SERVICES LITTLE ROCK, AR AKI AMERICAN NETWORK, INC NEW YORK, NY AKJ RHYTHMS LINKS INC (PREV ACCELERATED CONNECTIONS, INC) ENGLEWOOD, CO AKK CARICALL COMMUNICATIONS, INC MIAMI, FL AKL A K CELLULAR SOUTH BEND, IN AKM AMERICOM COMMUNICATIONS, LLC SACRAMENTO, CA AKN AMERITECH COMMUNICATIONS INTERNATIONAL, INC. CHICAGO, IL AKO ALASKA NETWORK SYSTEMS, INC. ANCHORAGE, AL AKP AMERICA’S TELE-NETWORK CORP. ALPHARETTA, GA AKQ ALASKA COMMUNICATION SYSTEMS INC DBA ATU ANCHORAGE, AK TELECOMMUNICATIONS AKR AKRON CELLULAR AKRON, OH AKS ARKANSAS-12 CELLULAR CORP JACKSON, MS AKT ACE LINK TELECOMMUNICATIONS, INC. HOUSTON, MN AKU ARCO PETROLEUM PRODUCTS CO (AKA ARCO PAY POINT) LOS ANGELES, CA AKV ACCESS NETWORK SERVICES, INC. DALLAS, TX AKW ARKANSAS STATE TELEPHONE HUNTSVILLE, TX AKX AIRNEX COMMUNICATIONS SAN RAMON, CA AKY AMERICAN GATEWAY TELECOMMUNICATIONS INC. RICHARDSON, TX AKZ ARKANSAS CELLULAR LIMITED PARTNERSHIP ROSWELL, GA ALA ALL-STATE COMMUNICATIONS BURLINGAME, CA ALB ALBANY CGSA LIMITED PARTNERSHIP PEARL RIVER, NY ALC IBM (PREV ADVANTIS) SCHAUMBURG, IL ALD ALLIED LONG DISTANCE SERVICES INC BEAUMONT, TX ALE A ALERT PAGING CO OF SAN FRANCISCO RANCHO CORDOVA, CA ALF ATL COMMUNICATIONS ALAMEDA, GA ALG AMERICAN LONG LINES HORSHAM, PA ALH ALPHA DISPLAY PAGING INC ST LOUIS, MO ALI AMERICAN SHARECOM OF WASHINGTON

Proprietary — Licensed Material See proprietary restrictions on title page. 9–8 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ALJ ALMAR COMMUNICATIONS ROCKFORD, IL ALK AMERITALK ARVADA, CO ALL ALLTELCO ALM ABLE MOBILE TELEPHONE AND PAGING SERVICE ALN GLOBAL CROSSING TELECOMMUNICATIONS (PREV FRONTIER COMM ROCHESTER, NY SERVICES) ALO AUTOPHONE OF LAREDO, INC LAREDO, TX ALP TEL SERV (PREV ABERDEEN LIMITED PARTNERSHIP) ABERDEEN, SD ALQ AMERITEL LONG DISTANCE INC RICHARDSON, TX ALR ATLAS RADIOPHONE ALS WORLDCOM INC. (PREV. LDDS) TULSA, OK ALT ACC LONG DISTANCE CORP (PREV. ALTERNATIVE COMMUNICATIONS ROCHESTER, NY CORP) ALU WORLDCOM INC. (PREV. LDDS DBA AMERICALL SYSTEMS OF TULSA, OK LOUISVILLE) ALV ALTERNATIVE NETWORK SERVICES COPLEY, OH ALW AL’S 2-WAY RADIO LA GRANDE, OR ALX AMPTELCO CORP ALBUQUERQUE, NM ALY ALBANY TELEPHONE COMPANY ALBANY, NY ALZ ALTERNATE ACCESS SERVICES INC ALBUQUERQUE, NM AMA AMCI ALARM AMB ATS MOBILE TEL INC AMC AMTEL CORP AMD AMERICAN DATACOM CORPORATION AME AMERICALL THE LONG DISTANCE PEOPLE JACKSONVILLE, FL AMF AMERICAN LDS MOBILE, AL AMG AT&T COMMUNICATIONS OF MICHIGAN INC AMH JC&N SATELLITE TELECOMMUNICATIONS (PREV AMERICAN TELE SAN DIEGO, CA HOLDING LTD AMI AMERICAN MOTOR INNS AMJ AMERICAN TEL GROUP INC ALBUQUERQUE, NM AMK AR MARKETING INC DENTON, TX AML AMTEL INC AMM MCLEODUSA (PREV ACCESS LONG DISTANCE (PREV ACCESS COMM) SALT LAKE CTY, UT AMN LOGIX COMMUNICATIONS CORPORATION (PREV AMERICAN TELCO OKLAHOMA CITY, OK INCORP.) AMO AT&T COMMUNICATIONS OF MOUNTAIN STATES INC AMP AAA MOBILE PHONE AMQ AMIERITEL INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–9 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AMR AMERICALL INC (ALABAMA) AMS ADVANCED MARKETING SERVICES INC AMT AMERTEL CO AMU AMERICAN COMMUNICATIONS INC WICHITA, KS AMV AMERICAN TELEPHONE SERVICE HUNTINGTON, WV AMW AT&T COMMUNICATIONS OF MIDWEST INC AMX AMERICAN EXPRESS PHONE LONG DISTANCE SVC NEW YORK, NY AMY AT&T COMMUNICATIONS OF MARYLAND INC AMZ AMPS INC ANA AT&T COMMUNICATIONS OF NEVADA INC ANB ANSER ANGELO SAN ANGELO, TX ANC AMERICAN COMMUNICATIONS AND ADVANCED PAGING & TELEMESSAGING INC FORT SMITH, AR ANE AIRCALL NORTHEAST INC ANF ACC NATIONAL TELECOM CORPORATION ROCHESTER, NY ANG AT&T COMMUNICATIONS OF NEW ENGLAND INC ANH ANSWERPHONE OF NATCHEZ ANI WORLDCOM INC. (PREV. LDDS) TULSA, OK ANJ A&NTELECOM LOS ANGELES, CA ANK AMERICAN NETWORK EXCHANGE INC (SUB OF AMNEX, INC) ORLANDO, FL ANL AMERICAN LONG DISTANCE INC PORTLAND, OR ANM ANSWER MADISON TELEPHONE SECRETARIES INC ANN LOGIX COMMUNICATIONS CORP. (PREV AMERICAN TELCO NETWORK HOUSTON, TX SERVICES) ANO PAGE TEXAS (FMLY AMERICAN MOBILPHONE PAGING) SAN ANTONIO, TX ANP USE IAC CODE TZB FORT LEE, NJ ANQ USE IAC CODE COC DALLAS, TX ANR ANTLER COMMUNICATIONS INC KINGSVILLE, TX ANS ANSWERING ASSOCIATES INC ANT AMERICAN NETWORK SERVICES DALLAS, TX ANU AMERICAN COMMUNICATIONS INTERNATIONAL LTD GAITHERSBURG, MD ANV ALTERNATIVE TOLL CARRIER D/FW AIRPORT, TX ANW WORLDCOM INC. (PREV. METROMEDIA COMMUNICATIONS CORP. - TULSA, OK SNC) ANX ALL-NET MACON, GA ANY ASSOCIATED COMMUNICATIONS OF NEW YORK INC ANZ AMERICAN NATIONAL TELECOM LOS ANGELES, CA AOA ALCO ANSWERING SERVICE INC AOB AMERICAN MOBIL SATELLITE CORPORATION RESTON, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–10 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AOC AMARILLO TELEPHONE CO., INC. DBA A-1 COMMUNICATIONS, INC. LUBBOCK, TX AOD ACCESS/ON MULTIMEDIA, INC. CONCORD, NC AOE ARMSTRONG COMMUNICATIONS, INC. BUTLER, PA AOF ATLANTIC CONNECTIONS, INC WORCESTER, MA AOG AMERICOM TECHNOLOGIES DELRAY BEACH, FL AOH AT&T COMMUNICATIONS OF OHIO INC AOI ACOMM INC. MINNEAPOLIS, MN AOJ ACCESS TELECOM TAMUNING, GM AOK APPLETON-OSHKOSH-NEENAH MSA LIMITED APPLETON, WI AOL APOLLO TELECOM SALT LAKE CITY, UT AOM ALLCOM LONG DISTANCE PECOS, TX AON ALTON CELTELCO JERSEYVILLE, IL AOO AMERICAN NORTEL COMMUNICATIONS INC SALT LAKE CITY, UT AOP ADVANTAGE OPERATOR SERVICES SAN ANTONIO, TX AOQ ALLCOM COMMUNICATIONS RUIDOSO DOWNS, NM AOR ALERT OPERATORS GARLAND, TX AOS USE IAC CODE AOW AOT AOS CONTINENTAL OF CA SACRAMENTO, CA AOU AMERICAN DISCOUNT TELECOMMUNICATIONS INC DUNCANVILLE, TX AOV ATO SERVICES CORP BISHOP, CA AOW AT&T COMMUNICATIONS OF THE SOUTHWEST INC AOX AMERICA ONE COMMUNICATIONS, INC. VIENNA, VA AOY AMI COMMUNICATIONS, INC. GENEVA, IL AOZ AMERICAN METROCOMM CORPORATION NEW ORLEANS, LA APA AIR PAGE APB APPLIED BUSINESS TECHNOLOGIES INC PHOENIX, AZ APC WORLDCOM INC. (PREV. LDDS) TULSA, OK APD APPLIED SIGNAL CORP SAN JOSE, CS APE AIRPHONE INC APF AT&T COMMUNICATIONS OF PACIFIC NORTHWEST INC APG AUSTIN PAGING INC APH AIRPHONE CO INC API WORLDCOM INC. (PREV. LDDS) TULSA, OK APJ AMERICAN PAGING SERVICES SOUTHFIELD, MI APK AIRPULSE, INC. ATLANTA, GA APL AMERICAN PRIVATE LINE APM AIR PAGE MOBILE SERVICE APN AEROPHONE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–11 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location APO ANSWERPHONE INC APP ANS-A-PHONE OF PEARL . APQ APPLE COMMUNICATIONS INC CHICAGO, IL APR AT&T OF PUERTO RICO ATLANTA, GA APS ADVANCED PAGING SERVICES INC APT USE IAC CODE TZB FORT LEE, NJ APU USE IAC CODE TZB FORT LEE, NJ APV AMERICAN PUBLIC & PRIVATE COMMUNICATIONS INC MIAMI, FL APW USE IAC CODE TZB FORT LEE, NJ APX THE ASSOCIATED PRESS NEW YORK, NY APY AT&T COMMUNICATIONS OF PENNSYLVANIA INC APZ APOLLO TELECOMMUNICATIONS SERVICE AQA AMERICAN TELNET INC MIAMI, FL AQB AA BEEP FREDRICK, MD AQC ACACIA TELEPHONE & COMMUNICATIONS CO (PREV ACACIO COMM) WASHINGTON, DC AQD CADETELCO,LLC DBA ALL STATES TELEPHONE CO COLORADO SPRINGS, CO AQE AMERICELL PA-3 LIMITED PARTNERSHIP ITHACA, NY AQF CANNECT COMMUNICATIONS, INC. VANCOUVER, BC AQG ATLANTIC TELESIS GROUP,INC. YONKERS, NY AQH ADELPHIA BUSINESS SOLUTIONS OPERATIONS, INC. BRIDGEVILLE, PA AQI ASSOCIATED COMMUNICATIONS INC PLAINVIEW, TX AQJ AIRWAVE WIRELESS COMMUNICATIONS, INC. SCOTTSBLUFF, NE AQK ATLANTIC TELEPHONE MEMBERSHIP CORPORATION SHALLOTTE, NC AQL A QUALITY COMMUNICATION SERVICES HUDSON, FL AQM ALBUQUERQUE MOBILE TELEPHONE SERVICE AQN AMERICAN TEL-TEK INC LARCHMONT, MY AQO ASSOCIATION COMMUNICATIONS SEATTLE, WA AQP ASAP PAGING INC HALLETTSVILLE, TX AQQ AMERICELL COMMUNICATIONS WILBUR, WA AQR ALBUQUERQUE RADIO TELEPHONE SERVICE AQS ATS PLEASANT HILL, CA AQT ATLANTIC TELEPHONE INC DAYTONA BEACH, FL AQU ATLAS COMMUNICATIONS SPRINGFIELD, MS AQV ATI TELECOM INC. CORONA, NY AQW AMM COMMUNICATIONS COLD SPRINGS, MN AQX ADEPTEL INC ALTAMONTE SPRINGS, FL AQY ALTERNATE COMMUNICATIONS, INC. SCOTTSDALE, AZ AQZ S&S COMMUNICATIONS/ALTERNA-CELL ABERDEEN, SD

Proprietary — Licensed Material See proprietary restrictions on title page. 9–12 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ARA AIRCALL INC (ASHVILLE) ARB ARBUCKLE COMMUNICATIONS CONSULTANTS DUNCAN, OK ARC AMERICAN MICROWAVE COMMUNICATIONS INC ARD ADVANCED RADIO COMMUNICATIONS SYSTEMS RENO, NV ARE AMERICAN EXPRESS TRAVEL RELATED SERVICES DENVER, CO ARF ANSWER FARGO MINNEAPOLIS, MN ARG ANSWER GIRL INC SAN JOSE, CA ARH AMERICA’S CHOICE TEL INC MEDESTO, CA ARI ANSWER ILLINOIS DES MOINES, IA ARJ AMERINET COMMUNICATION FAYETTEVILLE, GA ARK AMTRAK WASHINGTON, DC ARL AIRCALL INC ARM ARMOUR COMMUNICATIONS ARN AIRCALL NORTHWEST INC ARO AROOSTOOK COMMUNICATIONS ARP ANSWERPHONE AND RADIO PAGING INC ARQ AMTRON CORP KANSAS CITY, MO ARR AERONAUTICAL RADIO INC ANNAPOLIS, MD ARS AMERICAN RADIO-TELEPHONE SERVICE INC BALTIMORE, MD ART ALERT PAGING INC ARU AMARILLO CELLULAR TELEPHONE CO AMARILLO, TX ARV AIRVOICE INC ARW AIRCOM MOBERLY, MS ARX AMERICAN TELTRONIX SCRANTON, PA ARY AIR CITY ARZ PAC-WEST TELECOMM, INC. DBA AMERICALL (PREV. AMERICALL STOCKTON, CA CORP.) ASA AUTOPHONE OF SAN ANTONIO INC ASB ACCESS TELECOM INTERNATIONAL WAKEFIELD, MA ASC GENUITY TELECOM, INC. (PREV GTE TELECOM) ROCKVILLE, MD ASD TELIGENT SERVICES INC (PREV ASSOCIATED GROUP DBA ASSOC. LOS ANGELES, CA COMM LA) ASE ANSERPHONE INC ASF ADVANCE COMMUNICATIONS SOFTWARE INC ASG ANSWER INC - GALVESTON ASH ANSWER INC - HOUSTON ASI FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION INC ROCHESTER, NY ASJ BROWNIE COMMUNICATIONS CORP DBA ICLD(PREV ATLAS COMM.& DELRAY BEACH, WI TELEPHONE)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–13 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ASK AIRPAGE BIG SKY BILLINGS, MT ASL ANSERFONE OF ST LUCIE CITY ASM ASSOCIATED TELEPHONE ANS SERVICE MOBILE ASN ASSOCIATED TELENET INC CORPUS CHRISTI, TX ASO ASSOCIATED COMMUNICATIONS INC (PAGING) ASP ANSWERITE PROFESSIONAL TELEPHONE SERVICE ASQ WESTERN WIRELESS COMMUNICATIONS, INC (PREV ALL STATE SAN LUIS OBISPO, CA PAGING) ASR ANSWER INC AST ASSOCIATED TELEPHONE ANSWERING SERVICE ASU AT&T COMMUNICATIONS OF THE SOUTHERN STATES INC ASV AMERICAN TEL-SAVE OF SPOKANE INC SPOKANE, WA ASW ANSWERITE COMMUNICATIONS ASX ASSOCIATED PAGING AND TELEPHONE CORPUS CHRISTI, TX ASY ATLAS SECURITY INC ASZ ATS TELEPHONE & DATA SYSTEMS INC MEMPHIS, TN ATA ANDERSON TELEPHONE ANSWERING SERVICE ATB ATHENS BUSINESS COMMUNICATIONS THE PLAINS, OH ATC NTS COMMUNICATIONS (PREV GST TELECOM) LUBBOCK, TX ATD ASSOCIATED TELEPHONE DESIGN ATE WORLDCOM INC. (PREV. METROMEDIA COMMUNICATIONS CORP.-SNC) TULSA, OK ATF ATCHISON TOPEKA AND SANTA FE RAILWAY CO (THE) KANSAS CITY, KS ATG AUTOPHONE OF GAINESVILLE INC ATH ALL COMMUNICATIONS TECHNOLOGY SERVICES GREENLAKE, WI ATI AT&T COMMUNICATIONS-INTERSTATE DIVISION ATJ AMERICAN TELESIS MCLEAN, VA ATK AMERICAN TRANSTECH JACKSONVILLE, FL ATL AIR-TEL INC PONTIAC, IL ATM ASSOCIATED TELEPHONE MANAGEMENT SERVICES ATN ALTOONA TELEMESSAGE CENTER ATO NATIONAL COMMUNICATIONS NETWORK (PREV ATS COMMS INC) ATP ALERT PAGING ATQ A T H COMM SANTA ANA, CA ATR AMERICAN TELEVISION RELAY ATS LCI INTERNATIONAL (PREV ATS NETWORK COMMUNICATIONS) MEMPHIS, TN ATT AMERICAN TELEMANAGEMENT PALO ALTO, CA ATU AMERICAN TELECOMMUNICATIONS CORP DALLAS, TX ATV AUTOPHONE OF VIDALIA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–14 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ATW ASSOCIATED TERMINATING NETWORK CORPUS CHRISTI, TX ATX AT&T COMMUNICATIONS ATY AMERICAN TELESYSTEMS ATZ ATX TELECOMMUNICATIONS SERVICES, LTD(PREV ATX EASY ACCESS PHILADELPHIA, PA LONG) AUA ACC OF PENNSYLVANIA LLC (PREV AMRO CELLULAR CORPORATION) ZANESVILLE, OH AUB ACCUCOMM TELECOMMUNICATIONS, INC. IRWINTON, GA AUC COASTAL AUTOMATED COMMUNICATIONS CORP NEW CASTLE, DE AUD TOUCH AMERICA, INC. (PREV TOUCH AMERICA SERVICES INC) BUTTE, MT AUE ACCUTEL OF TEXAS, INC. DALLAS, TX AUF AUTOFONE INC AUG AUTO PAGE LEVELLAND, TX AUH AUTO PHONE YUMA, AZ AUI ATU LONG DISTANCE ANCHORAGE, AK AUJ CANCALL COMMUNICATIONS, INC. NEWARK, NJ AUK ARBUCKLE COMMUNICATIONS ARDMAORE, OK AUL ATLANTIC CELLULAR COMPANY, L.P. DBA LONG DISTANCE BY COLCHESTER, VT CELLULAR ONE AUM ARN COMMUNICATIONS CORP MIAMI, FL AUN AUBURN TELECOM LTD FRESNO, CA AUO AUTOTEL LAS VEGAS, NV AUP AUTOPAGE INC TEXARKANA, TX AUQ ALO-USA CORPORATION MIAMI, FL AUR AMC CELLULAR CORP FAYETTEVILLE, NY AUS ACCESS US AUT AUTO-PHONE CO AUU AUS INC BETHESDA, MD AUV AUTOMATED TELECOM PALM DESERT, CA AUW ACE COMMUNICATIONS OAKTON, VA AUX AUTUMN COMMUNICATIONS, INC. SAN ANTONIO, TX AUY AUSTIN COMMUNICATIONS SYSTEMS AUSTIN, TX AUZ AMERICAN RURAL CELLULAR PANAMA CITY, FL AVA AT&T COMMUNICATIONS OF VIRGINIA INC AVB ADVANCED MOBILE COMM DENVER, CO AVC ADVANCED TELEMESSAGING CENTER REDDING, CA AVD FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, INC. ROCHESTER, NY AVE ADVANTAGE CELLULAR INC VENTURE, CA AVF ADVANCED COMMUNICATIONS, INC. SPARKS, NV AVG ADVANTAGE COMMUNICATIONS INC WICHITA, KS

Proprietary — Licensed Material See proprietary restrictions on title page. 9–15 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AVH ADVANCED TELEPHONE PROMOTIONS INC. MADISON HEIGHTS, MI AVI AT&T OF VIRGIN ISLANDS ATLANTA, GA AVJ ADVANCED TEL-COM SYSTEMS KERRVILLE, TX AVK ACCESS CONFERENCE CALL SERVICE WASHINGTON, DC AVL A V LAUTTAMUS COMMUNICATIONS WEIRTON, WV AVM ADVANCED MOBILE COMMUNICATIONS SANTA MARIA, CA AVN INVALID DO NOT USE NASHVILLE, TN AVO AMERIVOICE TELECOMMUNICATIONS INC BROOKFIELD, WI AVP ADVANCED PAGING MCALLEN, TX AVQ ADVANCED TELEMEDIA INTERNATIONAL MIAMI, FL AVR AVIRNEX COMMUNICATIONS GROUP LARKSPUR, CA AVS E.SPIRE COMMUNICATIONS, INC (PREV AMERICAN COMMUN. ANNAPOLIS JUNCTION, SERVICES INC) MD AVT ADVANCED TELCOM INCORPORATED AVU AMERIVISION COMMUNICATIONS, INC. OKLAHOMA CITY, OK AVV ALTERNET OF VIRGINIA RICHMOND, VA AVW ACSI COMMUNICATION SERVICES, INC. OAKBROOK, IL AVX AMVOX LOS GATOS, CS AVY ADVANCED TELECOM INC. WAXAHACHIE, TX AVZ FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, INC. ROCHESTER, NY AWA AIRWEST AIRLINES LDB HOUSTON, TX AWB ANANDA WORLD BROTHERHOOD VILLAGE NEVADA CITY, CA AWC ALL WEST COMMUNICATIONS INC VANCOUVER, WA AWD AT&T COMMUNICATIONS OF WASHINGTON DC INC WASHINGTON, DC AWE STAR TELE. INC DBA ALLSTAR TELECOM (PREV DIGITAL NETWORK DALLAS, TX INC) AWF ALLSTATE NETWORK, INC. LOS ANGELES, CA AWG THE CABLE AND WIRELESS PUBLIC LIMITED COMPANY HAMILTON, BM AWH ALLTEL COMMUNICATIONS OF THE MIDWEST INC(PREV ALIANT LINCOLN, NE MIDWEST INC) AWI AT&T COMMUNICATIONS OF WISCONSIN INC AWJ ALPHA WIRELESS COMM CO DBA MANKATO MOBILE RADIO & COMM N MANKATO, MN SPECIALIST AWK ASSOCIATED NETWORK PARTNERS, INC. SPRINGFIELD, IL AWL AT&T WIRELESS SERVICES PARAMUS, NJ AWM AMERICAN MOBILPHONE PAGING CHARLESTON, WV AWN ALLENTOWN CELLULAR TELEPHONE CO GREENSBORO, NC AWO ATLANTIC TELE-NETWORK CO ST THOMAS, VI AWP ANSWERPHONE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–16 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AWQ METROLINK(PREV. AMERICAN TELETRONICS NETWORK SERVICES, CHICAGO, IL INC) AWR ANSERWRITE WINTERPARK, FL AWS AWESOME PAGING INC VICTORIA, TX AWT ASCENDING TECHNOLOGIES INC BEACHWOOD, OH AWU A.R.C. NETWORKS, INC (PREV A.R.C. NETWORKS CORPORATION) HAUPPAUGE, NY AWV AT&T COMMUNICATIONS OF WEST VIRGINIA INC AWW ACCESS WORLD COMMUNICATIONS LAUDERHILL, FL AWX USE IAC CODE ATS MEMPHIS, TN AWY ALLWORLD COMMUNICATIONS NETWORK BROOKLYN, NY AWZ AIR WAVES COMMUNICATIONS INC PARIS, TX AXA ALPINE COMMUNICATIONS, L.C. DES MOINES, IA AXB ATLANTIC TELECOM CORPORATION BALA CYNWYD, PA AXC AMERICAN COMMUNICATIONS TECHNOLOGY INC RENO, NV AXD ALEXANDRA CELLULAR CORPORATION NEW YORK, NY AXE ALLEN COMMUNICATION SERVICES GRAHAM, TX AXF ACCESSNET INTERNATIONAL MANHATTAN, NY AXG AP&T LONG DISTANCE, INC. PORT TOWNSEND, WA AXH AXISTEL INTERNATIONAL INC JERSEY CITY, NJ AXI AMERICAN INTERNATIONAL TELEPHONE, INC. PURCHASE, NY AXJ ACCESS INTEGRATED NETWORKS, INC. MACON, GA AXK ACD TELECOM EAST LANSING, MI AXL AMERICAN LONG DISTANCE EXCHANGE INC LOS ANGELES, CA AXM ACXIOM CORPORATION CONWAY, AR AXN ALLEGHENY NATIONAL COMMUNICATIONS INC ACTON, MA AXO PICUS COMMUNICATIONS, LLC (PREV ATLANTIC TELECOM, INC.) VIRGINIA BEACH, VA AXP AMERICAN PAGING BURTONSVILLE, MD AXQ AXCES INC HOUSTON, TX AXR ALARM CENTER INC LACEY, WA AXS AXXIS COMMUNICATIONS SPRINGDALE, AR AXT AMNET INC MESA, AZ AXU A & R COMMUNICATIONS GLENDIVE, MT AXV ALTERNATIVE LONG DISTANCE, INC. CASTLE ROCK, CO AXW ALL WEST WORLD CONNECT KAMAS, UT AXX ACCESS TELECOMMUNICATIONS INTERCONNECT NORCROSS, GA AXY ANNOX, INC. PLEASANT VIEW, TN AXZ AAA TELEPHONE & COMMUNICATIONS, INC. HARLINGEN, TX AYA ATLANTIC TELECOMMUNICATION SYSTEMS, INC. WEST PALM BEACH, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–17 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AYB AL-CALL, INC. ALMA, GA AYC ALL WAYS COMUNICATIONS HAGERSTOWN, MD AYD ESCHELON TELECOM, INC (PREV ADVANCED TELECOMM., INC.) MINNEAPOLIS, MN AYE ADVENT CONSULTING & TECHNOLOGY, INC. WESLEY CHAPEL, FL AYF ADCOMP SYSTEMS, INC NEW YORK, NY AYG ALLIANCE GROUP SERVICES INC WESTERN, CT AYH ALIANT INC ST JOHNS, CN AYI ADT SECURITY SYSTEMS, INC. PARSIPPANY, NJ AYJ AURASERV COMMUNICATIONS, INC. ENGLEWOOD, CO AYK AT&T COMMUNICATIONS OF NEW YORK INC AYL AMERICAN TELESOURCE INTERNATIONAL, INC. SAN ANTONIO, TX AYM ADAMS TELSYSTEMS, INC. GOLDEN, IL AYN CAT COMMUNICATIONS INTERNATIONAL INC ROANOISE, VA AYO ADVANCED CELLULAR CORPORATION ST. PETERSBURG, FL AYP ALL CITY PAGING TARZANA, CA AYQ AAT RSA COMPANY,LP STATEN ISLAND, NY AYR ALTAIRE CORPORATION NEW PORT BEACH, CA AYS AIC ASIA INTERNATIONAL SERVICES CORPORATION RICHMOND, BC AYT ADVANCED AIRSYSTEMS TECHNOLOGY, INC LANCASTER, TX AYU AUSTIN TELECO U.S.A., INC. AUSTIN, TX AYV ACN COMMUNICATION SERVICES INC FARMINGTON HILLS, MI AYW ADVANTAGE CELLULAR SYSTEMS, INC ALEXANDRIA, TN AYX CAMBRIAN COMMUNICATIONS LLC FAIRFAX, VA AYY ACS SYSTEMS, INC SANTA ANA, CA AYZ AEVIA, INC. WALNUT CREEK, CA AZA ARTHUR ANDERSON & CO CHICAGO, IL AZB A & B ELECTRONICS INC ABILENE, TX AZC ARRIVAL COMMUNICATIONS, INC. (PREV ACN COMMUNICATIONS, INC) HIGHLANDS RANCH, CO AZD ALTERNATIVE LONG DISTANCE, INC. SAN MARCOS, TX AZE AMERITECH MOBILE COMMUNICATIONS UNIONTOWN, OH AZF CALLNET COMMUNICATIONS, INC. DALLAS, TX AZG ARBROS COMMUNICATIONS LICENSING COMPANY, N.E. LANDOVER, MD AZH AVIX TELECOM SOLUTIONS INC TAMPA, FL AZI AMERICAN TELECOMMUNICATION SERVICES SOUTHFIELD, MI AZJ ZAMA NETWORKS, INC. SEATTLE, WA AZK CAIS INTERNET WASHINGTON, DC AZL APPLE COMMUNICATIONS CORP AUSTIN, TX AZM AMERICAN TELEPHONE CO THE ALLENTOWN, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–18 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location AZN MID MCND DBA MIDCOM COMMUNICATIONS INC. SETTLE, WA AZO AZCOM PAGING INC TUCSON, AZ AZP AMERICAN PAGING OF PA PITTSBURGH, PA AZQ ATNT CUMBERLAND, MD AZR ATT RADIOTELEPHONE CORP STATEN ISLAND, NY AZS ACCESS TELECOMMUNICATIONS NETWORK LANCASTOR, PA AZT AZTEC COMMUNICATION AZU BROOKS FIBER COMMUNICATIONS (PREV ADVANTAGE GRAND RAPIDS, MI COMMUNICATIONS GROUP) AZV ALTERNATIVE TELECOMMUNICATION SERVICES, INC. BROOKSVILLE, FL AZW APPALACHIAN WIRELESS HAROLD, KY AZX AACS COMMUNICATIONS INC ARLINGTON, TX AZY AWZ CELLULAR CORP. HOUSTON, TX AZZ AIR PAGE CORPORATION BROOKFIELD, WI BAA BARR TELL USA, INC. LONG BEACH, NY BAB BELL ATLANTIC TELEPRODUCTS CORP EXTON, PA BAC BAY AREA CELLULAR TELEPHONE CO SAN ROMAN, CA BAD BELL ATLANTIC COMMUNICATIONS (PREV. BELL ATLANTIC LONG ARLINGTON, VA DISTANCE) BAE BAE COMMUNICATIONS INC MOUNT VERNON, OH BAI BELL ATLANTIC INFOSPEED NORFOLK, VA BAK BAKERSFIELD CELLULAR BAKERSFIELD, CA BAL BELL ATLANTIC INC PHILADELPHIA, PA BAM USE IAC CODE EBA BAN BETTER ANSWER BAO BAY AREA CELLULAR ONE OAKLAND, CA BAP BORGER AIR PAGE INC BAR BARTS LD GROUP FT WORTH, TX BAS BAY ANSWERPHONE BAT BAY AREA TELEPORT ALAMEDA, CA BAU BELL ATLANTIC PLUS ARLINGTON, VA BAV BELL ATLANTIC DIRECTORY SERVICES, INC. BETHESDA, MD BAW BELL ATLANTIC NETWORK SERVICES, INC. SILVER SPRING, MD BAX BELL ATLANTIC COMMUNICATIONS INC DBA VERIZON LONG ARLINGTON, VA DISTANCE BAY BAY COMMUNICATIONS FALL RIVER, MA BBC B & B COMMUNICATIONS DEL RIO, TX BBD BROADBAND SERVICES CO KNOXVILLE, TN BBE BELLSOUTH BSE, INC. ATLANTA, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–19 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BBG BBG COMMUNICATIONS, INC. SAN DIEGO, CA BBH BBH CORP. AURORA, ME BBI BROADBAND OFFICE COMMUNICATIONS INC VIENNA, VA BBK BRISTOL BAY CELLULAR PARTNERSHIP KING SALMON, AK BBL TABBY TELEPHONE, INC. CAMBRIDGE, MA BBM B & B MOBILE COMM MEXIA, TX BBN BROADBAND COMMUNICATIONS, INC WINCHESTER, MA BBO BRIDGEBAND COMMUNICATIONS, INC BOZEMAN, MT BBP BETTER BEEPERS INC BBS BEEP BEEP SUNCOAST INC COCOA, FL BBT B & B TRANSATLANTIC OCEAN CABLE, INC. SD, CA BBV BBC COMMUNICATION SERVICES HOUSTON, TX BBX BARNSTABLE TELECOM, INC BARNSTABLE, MA BBY BBIS COMMUNICATIONS, INC. MARBLEHEAD, MA BCA BERKSHIRE CABLE CORP. KINDERHOOK, NY BCB BEND CABLE DATA SERVICES LLC. BEND, OR BCC BIG COUNTRY COMMUNICATIONS COEUR D’ALENE, ID BCD 567562 B.C. LTD NEW WESTMINSTER, BC BCE BC TEL SYSTEMS SUPPORT, INC. BURNABY, BC BCG BASCOM LONG DISTANCE BASCOM, OH BCH XNET, INC. (PREV. BUSINESS CHOICE NETWORK, INC.) VIRGINIA BEACH, VA BCI BLACKHAWK COMMUNICATIONS INC BARABOO, WI BCK BC 1-800 MARKETING VANCOUVER, BC BCL BEEPCALL SYRACUSE, NY BCM BERKSHIRE COMMUNICATIONS BCN BUSINESS COMMUNICATIONS NETWORK INC DENVER, CO BCO BACKBONE COMMUNICATIONS INC LOS ANGELES, CA BCP BOEING COMPUTER CO BCR TELCORDIA TECHNOLOGIES (PREV. BELLCORE) PISCATAWAY, NJ BCS BEEP COMMUNICATIONS SYSTEMS INC BCT BRITTAN COMMUNICATIONS INTERNATIONAL CORP. HOUSTON, TX BCU BELLSOUTH CELLULAR MOBILE, AL BCW BLUE CROSS OF WESTERN PENNSYLVANIA INC PITTSBURGH, PA BCX BC TEL BURNABY, BC BCY BUTTE COUNTY CELLULAR LICENSE CORPORATION FAIRFIELD, CA BCZ BCS COMMUNICATIONS INC CHICAGO, IL BDA BLINK DATA CORP ROCHELLE PARK, NJ BDC BAND COMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 9–20 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BDE BLEDSOE TELEPHONE COOPERATIVE PIKEVILLE, TN BDF BIDDEFORD INTERNET CORP. BIDDEFORD, ME BDG BUDGET-TELEPHONE INC DURANGO, CO BDI BERMUDA DIGITAL COMMUNICATIONS LTD HAMILTON, BM BDL BLOOMINGDALE TELEPHONE COMPANY, INC. BLOOMINGDALE, MI BDM BRINDLEE MOUNTAIN TELEPHONE CO ARAB, AL BDN BTC LONG DISTANCE, INC. BLOUNTSVILLE, AL BDO BALLARD RULAL TELEPHONE COOPERATIVE CORPORATION LA CENTER, KY BDP BENEFICIAL DATA PROCESSING CORP PEAPACK, NJ BDR BORDERCOMM INC EL PASO, TX BDS BENGAL COMMUNICATIONS INTERNATIONAL, INC. GREENBELT, MD BDT BREDA TELEPHONE CORPORATION BREDA, IA BDU BRANDENBURG TELECOM LLC BRANDENBURG, KY BDV BEAUZILE DEVEREUX COMMUNICATIONS, LTD NEW YORK, NY BDW BD WEBB ENTERPRISE, INC. DBA QUAD CITY COMMUNICATIONS TAMPA, FL BDX BAND-X MANHATTAN, NY BEA BELL AIR COMMUNICATIONS SPOKANE, WA BEC BEC COMMUNICATIONS INC NEW YORK CITY, NY BED BELL CANADA MONTREAL, PQ BEE BETTER BEEP (A) SAN LUIS OBISPO, CA BEH BRESNAN TELEPHONE OF MICHIGAN, LLC. MARQUETTE, MI BEI BELL ATLANTIC VIDEO SERVICES GREENBELT, MD BEK BENKELMAN TELEPHONE CO., INC. BENKELMAN, NE BEL BOBIER ELECTRONICS BEM B-E-M SYSTEMS INC BEN BELLSOUTH TELECOMMUNICATIONS, INC.- ALEC ATLANTA, GA BEO BRUCE TELEPHONE COMPANY, INC. BRUCE, MS BEP BEEP CALIFORNIA INC SAN DIEGO, CA BER THE BEEPER COMPANY (SUB OF R&B COMM.) DALEVILLE, VA BES BEEPLES, INC. OKEMOS, MI BET BETHANY COLLEGE INC BETHANY, WV BEU BUSINESSNET TELECOM, INC. MIAMI, FL BEV BEVCOMM, INC. BLUE EARTH, MN BEX BELLFAX INC NEW YORK, NY BEY US WEST LONG DISTANCE, INC. (PREV WKP, INC) DENVER, CO BEZ BTM ENTERPRISES, INC. JEFFERSON, MA BFC BROOKS FIBER PROPERTIES ( PREV. BROOKS FIBER SACRAMENTO, CA COMMUNICATIONS, INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–21 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BFI BFI COMMUNICATION, INC. SAN DIEGO, CA BFL BUFFALO TELEPHONE CO BUFFALO, NY BFP BROOKS FIBER PROPERTIES, INC. TOWN & COUNTRY, MO BFT BLACKFOOT TELEPHONE, INC MISSOULA, MT BGA BIG APPLE PAGING CORP PLAINVIEW, NY BGC BABY GRAND CORP BGE BALTIMORE GAS & ELECTRIC BALTIMORE, MD BGH BINGHAMTON CELLULAR CO BINGHAMTON, NY BGI BGLO INTERNATIONAL INC WOODLAND HILLS, CA BGL BLUEGRASS TELECOM, LLC ELIZABETHTOWN, KY BGM BRIDGECOM INTERNATIONAL, INC (PREV BRIDGECOM MOUNT KISCO, NY INTERNATIONAL, LLC) BGO BCI & CLT, LLC DBA NEXTGEN COMMUNICATIONS CLEAR LAKE, WI BGP BUDGET PHONE INC. SHREVEPORT, LA BGT BAY SPRINGS LONG DISTANCE, INC. MONROE, LA BGV ABT LTD OREGON CITY, OR BHC BIRCH TELECOM, INC. KANSAS CITY, MO BHD BEAVERHEAD ELECTRONICS DILLON, MT BHF BLACK HILLS FIBERCOM TOWN AND COUNTRY, MO BHI BIRCH HILL LIMITED VIENNA, VA BHL BLACK HILL CELLULAR TELEPHONE CO RAPID CITY, SD BHM BRAHMACOM, INC. FORT LAUDERDALE, FL BHN BUSINESS AUTO PHONE INC TAZEWELL, VA BHR BEECH RIDGE TELEMETRY, INC. BECKLEY, WV BHT BACHTEL CELLULAR LIQUIDITY LP PHILADELPHIA, PA BHV BEEHIVE TELEPHONE CO INC WENDOVER, UT BHY BETHANY TELCOM PLANO, TX BIA BILAN COMMUNICATIONS, INC. MONROE, MI BIC BUILDING COMMUNICATIONS, INC. THREE RIVERS, MI BID PALMERTON LONG DISTANCE DBA BLUE RIDGE TELEPHONE PALMERTON, PA BIE BLUE RIBBON RENTALS II, INC. DBA TALK ONE AMERICA CUHAHOGA FALLS, OH BIG BLOOMINGDALE COMMUNICATIONS, INC. BLOOMINGDALE, MI BIL BELLSOUTH INTERNATIONAL ACCESS, INC. ATLANTA, GA BIM BI-TEC COMPANY, INC. FORT WAYNE, IN BIN BASIN 2 WAY RADIO INC BIG SPRING, TX BIO THE BASICO GROUP, INC CORAL GABLES, FL BIP BEEPER 1 TEMPE, AZ BIR BAIR COMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 9–22 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BIS BI-STATE TELEPHONE INC FENWICK ISLAND, DE BIT BITEX INTERNATIONAL INC BIW BITWISE COMMUNICATIONS INC PEORIA, IL BIZ BIZ TEL LONG DISTANCE TELEPHONE CO BJB BJB ENTERPRISES INC BKC BKC TELECOMMUNICATIONS, INC. SAN MARCOS, TX BKM BOOKER COMMUNICATIONS ALCESTER, SD BKR BECKER CHICAGO, IL BKS BROOKSIDE TELEPHONE CO INC ARLINGTON, TX BKY BEEP-ALERT OF KENTUCKY LEXINGTON, KY BLA BELL ATLANTICOM SYSTEMS INC PRINCETON, NJ BLC BLC COMMUNICATIONS GRAND BLANC, MI BLD BLUEGRASS LONG DISTANCE, INC. LEXINGTON, KY BLE BEE LINE LONG DISTANCE SALT LAKE CITY, UT BLG BELL ATLANTIC PAGING PARSIPPANY, NJ BLH BELENOS MILTON, MA BLI BELL ATLANTIC INTERNET SOLUTIONS, INC. RESTON, VA BLK BLACK MTN COMMUNICATIONS BLYTHE, CA BLL BELL COMMUNICATIONS INC FORT WORTH, TX BLM BELLCOM NUTLEY, N. BLN BESTLINE TAS BLO BORDERLAND COMMUNICATIONS, LLC NIAGARA, WI BLP BELL PAGING CO. LOS ANGELES, CA BLR BOULEVARD COMMUNICATIONS, L.L.P. CRANBERRY, PA BLS BATTLES COMMUNICATIONS INC DEXTER, MO BLT BELSAVE TELECOMMUNICATIONS GLENSIDE, PA BLU BLUEGRASS CELLULAR ELIZABERHTOWN, KY BLV THE BENTLEYVILLE LONG DISTANCE COMPANY BENTLEYVILLE, PA BLW BLACK WORLD TELECOMMUNICATIONS SLIVER SPRING, MD BLX BELL ATLANTIC COMMUNICATIONS INC. ARLINGTON, VA BLZ B-LEC, INC. NEW HYDE PARK, NY BMB BRANNEN MOBILE TELEPHONE BMC BALDPATE METROCOMMUNICATIONS INC ESTES PARK, CO BME BAY AREA MEDICAL EXCHANGE ST. PETERSBURG, FL BMG TELEMANAGEMENT SYSTEMS, INC. ENGLEWOOD, CO BMI BMI INC ITAACA, IL BMJ NORLIGHT TELECOMMUNICATIONS, INC(PREV BEMIDJI LDS) DULUTH, MN BML WORLDCOM INC. (PREV. LDDS) TULSA, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 9–23 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BMM BIS-MAN MOBILE PHONE, INC BISMARCK, ND BMN BUSINESS COMMUNICATIONS DES MOINES, IA BMO BEE MOBILRADIO BMP BOCA MOBILEPHONE BMS BROADCAST MEDIA SATELITE, INC. HATO REY, PR BMT BRINDLLE MOUNTAIN TELEPHONE COMPANY ARAB, AL BMY BELL MOBILITY CELLULAR, INC. ONTARIO, CN BNA VERIZON VIRGINIA INC (PREV BELL ATLANTIC-VA,INC) RICHMOND, VA BNB BORINQUEN BEEPERS INC SAN JUAN, PR BNC BASIN COMMUNICATIONS INC BND VERIZON DELAWARE INC (PREV BELL ATLANTIC-DEL,INC) PHILADELPHIA, PA BNE BAYNET, INC. ABRAMS, WI BNG BOSTON COMMUNICATIONS GROUP INC WOBURN, MA BNH VERIZON WASHINGTON DC INC (PREV BELL ATLANTIC-WASH,DC,INC) WASHINGTON, DC BNI VERIZON NETWORK INTEGRATION CORP(PREV BELL ATLANTIC NTW FRAZER, PA INTEGRAT) BNJ VERIZON NEW JERSEY INC (PREV BELL ATLANTIC-NJ,INC) NEWARK, NJ BNK VERIZON ADVANCED DATA INC (PREV BELL ATLANTIC NETWORK NEW YORK, NY DATA, INC) BNL BEN LOMAND COMMUNICATIONS, INC. MCMINNVILLE, TN BNM VERIZON MARYLAND INC (PREV BELL ATLANTIC-MD,INC) BALTIMORE, MD BNN BURLINGTON-NORTHERN BNO ABS CBN TELECOM NORTH AMERICA INC BURLINGAME, CA BNP VERIZON PENNSYLVANIA INC (PREV BELL ATLANTIC-PA,INC) PHILADELPHIA, PA BNS BUD-NORTH SHORE INC SANTA BARBARA, CA BNT BENNETT COMMUNICATIONS FLINT, MI BNV BONNEVILLE TELECOMMUNICATION CORP BNW VERIZON WEST VIRGINIA INC (PREV BELL ATLANTIC-WVA,INC CHARLESTON, WV BNX BCE NEXXIA CORPORATION TORONTO, ON BNY ACC OF MINNESOTA CORPORATION (PREV BUNYAN CELLULAR FERGUS FALLS, MN CORPORATION) BOA BANK OF AMERICA SAN FRANCISCO, CA BOB BROADBAND SOLUTIONS, INC. DENVER, CO BOC BOULDER COMMUNICATIONS BOULDER, CO BOD BOND ELECTRONICS ZEPHYRHILLS, FL BOE BRAVO CELLULAR, L.L.C. RENO, NV BOG BOOMERANG COMMUNICATIONS, INC. TAMP, FL BOH BULLOCH COUNTY RURAL TELEPHONE COOPERATIVE, INC. STATESBORO, GA BOI ARBROS COMMUNICATIONS INC SILVER SPRINGS, MD

Proprietary — Licensed Material See proprietary restrictions on title page. 9–24 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BOK BOK FINANCIAL CORPORATION TULSA, OK BOL BOLIN COMMUNICATION SYSTEMS TEXARKANA, TX BOM BARTEC TELECOMMUNICATIONS DALLAS, TX BON BONE COMMUNICATIONS INC EDNA, TX BOP TABLE TOP TELEPHONE COMPANY, INC. AJO, AZ BOR BOSTON TELECOMMUNICATION SERVICES CORPORATION LYNN, MA BOS BROADSPAN COMMUNICATIONS INC DBA PRIMARY NETWORK COMM. ST LOUIS, MO INC BOT EQUALNET CORPORATION (PREV BOTTOM LINE VANCOUVER, WA TELECOMMUNICATIONS, INC) BOU BARRY COUNTY TELEPHONE COMPANY DELTON, MI BPA BONNEVILLE POWER ADMINISTRATION BPC BEEP COMMUNICATIONS BPE BEEPER EXPRESS DE PUERTO RICO INC SAN JUAN, PR BPI B.C.P. INC ABELENE, TX BPL BIG PLANET, INC. PROVO, UT BPM BEEPERMART, INC. MICHIGAN CITY, IN BPN BELLSOUTH PERSONAL COMMUNICATIONS ATLANTA, GA BPO BP OIL CLEVELAND, OH BPP BEEP YORK, PA BPR BEEPERS ETC TAHLEQUAH, OK BPS BAKER PROTECTIVE SERVICE INC BPT BRIDGEPOINT INTERNATIONAL MONTREAL, PQ BPW BEEP WEST INC GLENWOOD SPRINGS, CO BPY BEEPER CITY, INC. LAS VEGAS, NV BQP BEEPER CO (THE) DALLAS, TX BRA BROADSTREAM CORPORATION STAMFORD, CT BRB BRUCE R BECKER BRC BEXAR COMMUNICATIONS INC BRD BRAINARD TELECOM BRAINARD, MN BRE BEV-R ENTERPRISES INC T/A TOUCHTONE COMMUNICATIONS UNION, NJ BRG BARAGA TELEPHONE COMPANY BARAGA, MI BRH BRAHMS KENNEDALE, TX BRI BROADSTREET COMMUNICATIONS, INC. CANONSBURG, PA BRL BRAZOS LONG DISTANCE OLNEY, TX BRM BRAMTEL DALLAS, TX BRN BRANSON TELEPHONE BRANSON, MO BRO BROADSLATE NETWORKS, INC (PREV CARDINAL COMM, INC. -VA) CHARLOTTESVILLE, VA BRP BELLAIRE ROAD AUTO PARTS, INC. CLEVELAND, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–25 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BRR B.R. COMMUNICATIONS ABILENE, TX BRS BUSINESS RADIO SALES & SERVICE INC CORALVILLE, IA BRT BAXLEY RADIO TELEPHONE SERVICES BRU BRUMFIELD NETWORK COMMUNICATIONS OAKLAND, CA BRV BROADSTREET COMMUNICATIONS OF VIRGINIA, L.L.C. CANONSBURG, PA BRX BROADPLEX, LLC MORGANTON, NC BRY BRYAN 800 COMMUNICATIONS INC BRYAN, TX BRZ BRAZOS CELLULAR COMMUNICATIONS INC OLNEY, TX BSA BEEPER STREET INC T/A ALL PAGE PARLIN, NJ BSB BIG SKY BEEPER BSC BONNEVILLE SATELLITE CORP BSD BUSINESS DISCOUNT PLAN DBA LD DISCOUNT PLAN LONG BEACH, CA BSE BASICPHONE, INC. BEAUMONT, TX BSG BUSINESS LONG DISTANCE READING, MA BSH BELLSOUTH COMMUNICATIONS NETWORK BSI BEEPER SERVICE INC BSK VDC TELECOMMUNICATIONS, INC(PREV BLUE SKY AURORA, CO TELECOMMUNICATIONS INC) BSL BELLSOUTH LONG DISTANCE ATLANTA, GA BSM BELLSOUTH MOBILITY INC NASHVILLE, TN BSN BASIN COMMUNICATIONS BSO BELLSOUTH BUSINESS SYSTEMS (PREV BELLSOUTH ATLANTA, GA TELECOMMUNICATIONS) BSP BUSINESS PHONES HERNDON, VA BSR BUSINESS RADIO INC KENNEWICK, WA BSS BELLSOUTH SERVICES BIRMINGHAM, AL BST BEEPER SERICE OF TULSA BSU BELLSOUTH BUSINESS SYSTEMS ATLANTA, GA BSV BUSINESS SERVICE CENTER INC WAUSAU, WI BSW B & S TELECOM, INC. DBA MI QUICK CONNECT LANSING, MI BSY BIG SKY TELECOM, INC. BASIN, WY BTA BARTEL COMMUNICATIONS, INC. ST LOUIS, MO BTB BREN CORP DBA TELE-BEEPERS BTC BUSINESS TELECOMMUNICATIONS CORP BTD BRANTLEY TELEPHONE COMPANY, INC. NAHUNTA, GA BTE ACC OF MICHIGAN CORPORATION (PREV GILRO CELLULAR) VERO BEACH, FL BTF ARKANSAS TELPHONE COMPANY, INC. CLINTON, AR BTG BT GLOBAL NETWORKS LIMITED ATLANTA, GA BTH BUSINESS TECHNOLOGY SYSTEMS, INC POMPANO BEACH, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–26 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BTI BITEK INC LONG BEACH, CA BTK BEST TELECOM LTD ISLANDIA, NY BTL BROOKS FIBER COMMUNICATIONS (PREV. BITTEL GRAND RAPIDS, MI TELECOMMUNICATIONS) BTM BUSINESS TELECOM INC RALEIGH, NC BTN BT NORTH AMERICA INC SAN JOSE, CA BTO BITRO TELECOMMUNICATIONS INC LOS ANGELES, CA BTP BETA TELE - PAGE INC TYLER, TX BTQ BT TELECOM, INC. WOODBRIDGE, NJ BTR BELL ATLANTIC-TRICON LEASING CORP PARAMUS, NJ BTS BUSINESS TELEPHONE SYSTEM INC BTT BUDGET TELEPHONE SEATTLE, WA BTU BTC COMMUNICATIONS, INC. BLOOMER, WI BTV BUSINESS TECHNOLOGY SERVICES INC MIAMI, FL BTW BTC INC BREDA, IA BTX MICHAEL BRINKMAN DBA TEXAS TELE COMMUNICATIONS ELGIN, TX BTY BLOUNTSVILLE TELEPHONE COMPANY BLOUNTSVILLE, AL BTZ ABTEL LLC PHOENIX, AZ BUA BUDGET COMM, LLC DONALSONVILLE, GA BUC BUDGET CALL LONG DISTANCE INC SAN MARCOS, TX BUD BUDGET CORP BENTON HARBOR, MI BUE USE IAC CODE TJP WALLA WALLA, WA BUG BUGGS ISLAND TELEPHONE COOPERATIVE BRACEY, VA BUH BIRCH TELECOM OF THE SOUTH, INC. KANSAS CITY, MO BUI BESTEL (USA) INC DOWN TOWN LAREDO, TX BUL BULLSEYE TELECOM, INC. SOUTHFIELD, MI BUM BRUCE TELECOMMUNICATIONS, LLC BRUCE, WI BUN BUYERS UNITED INTERNATIONAL, INC. DRAPER, UT BUR FRONTIER COMMUNICATIONS OF NEW ENGLAND, INC.(PREV. ROCHESTER, NY BURLINGTON) BUS BUSINESS COMMUNICATIONS INC BUT BUDGET TELEPHONE ANSWERING SERVICE BENTON HARBOR, MI BUU BUREAU 21 INC EL MONTE, CA BUV BUSINESS TELECOMMUNICATIONS SERVICES, INC. MIAMI, FL BUW BURNO, INC. DBA CITYWIDE-TEL. ORLANDO, FL BUY BUY-TEL COMMUNICATIONS, INC COLLEYILLE, TX BUZ ADDISON CLEC NETWORKS, INC DBA BUZNET COMMUNICATIONS DALLAS, TX BVC BROWN SERVICE CO DALLAS, TX BVD WISCONSIN LDS (INVALID CODE CO ACCQUIRED BY TGN) SHEBOYGAN, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–27 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BVH BEAVER HEAD ELECTRONICS BVM BLUERIVER COMMUNICATIONS, INC. SALEM, IN BVP BEAVER CREEK COOPERATIVE TELEPHONE COMPANY OREGON CITY, OR BVQ BLUE VALLEY TELECOMMUNICATIONS, INC. HOME, KS BVS BEVERLY SERVICE COMPANY DALLAS, TX BVT BUFFALO VALLEY TELEPHONE COMPANY LEWISBURG, PA BVY THE BLUE VALLEY TELEPHONE COMPANY HOME, KS BWA BLUEWATER COMMUNICATIONS CORPORATION FORT LAUDERDALE, FL BWB BESTWEB CLEC LTD. CROTON-ON-HUDSON, NY BWC BALDWIN CELLCOM, INC. BALDWIN, WI BWD BETTER WORLD TELECOM, INC. RESTON, VA BWE BRYANT’S WIRELESS SERVICES, INC. BEAUFORT, SC BWF BOARD WATER LIGHT & SINKING FUND COMM. DBA DALTON UTILITIES DALTON, GA BWI BLUESTAR NETWORKS, INC. NASHVILLE, TN BWL BW TELECOM BENKELMAN, NE BWO BROADWING LOCAL SERVICES INC. CINCINNATI, OH BWP BEST WESTERN PARKWAY CENTER INN BWR ALABAMA WIRELESS, INC CLEVAND, OH BWT BALTIMORE-WASHINGTON TELEPHONE PIKESVILLE, MD BWY KANNING, LARRY DBA A BEEP AWAY MOUNTAIN HOME, NC BXI BRAND X INTERNET SANTA MONICA, CA BXS BIXBY TELEPHONE SALES & SERVICE CO. BIXBY, OK BXT BIXBY TELEPHONE LONG DISTANCE CO BIXBY, OK BXY BIXBY TELEPHONE CO BIXBY, OK BYA BAY COMMUNICATIONS COMPANY PANAMA CITY, FL BYC BLANTON-YATES COMMUNICATIONS NORTH MYRTLE BEACH, SC BYD BOYD LONG DISTANCE DALLAS, TX BYE BAY SPRINGS TELEPHONE COMPANY INC BAY SPRINGS, MS BYG CBEYOND COMMUNICATIONS, LLC ATLANTA, GA BYI BENTLEYVILLE TEL CO BENTLEYVILLE, PA BYL BLUE SKY COMMUNICATIONS USA, INC. ALPHARETTA, GA BYM BAYCOMM INC. PAOLI, PA BYN BAY TNT NETWORK KENNEDALE, TX BYO BAYLAND COMMUNICATIONS, INC. ABRAMS, WI BYP BUYPASS ATLANTA, GA BYS BAY STAR SATELLITE PAGING HOUSTON, TX BYT BAY TELECOM FRESNO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–28 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location BYU THE BAYOU TELEPHONE COMPANY, INC. MORGAN CITY, LA BYV BRYANT SERVICE EULESS, TX BYW BEAUTY TOWN, INC., DBA ANNS COMMUNICATIONS TALLAHASSEE, FL BZA BZAAT COMMUNICATIONS QUEBEC, CN BZD BRAZORIA LONG DISTANCE BRAZORIA, TX BZE BIZTRANS TECHNOLOGY, INC. SPRINGFIELD, VA BZP BRAZOSPORT TELEPHONE CO LAKE JACKSON, TX BZT BIZ TEL (CALIFORNIA CO) SAN JOSE, CA CAA CALL AMERICA INC CAB COMMUNICATION CABLE-LAYING COMPANY INC SPRINGFIELD, MO CAC CACTUS INC CAD CARIBBEAN AUTOMATED LONG LINES SERVICES ST THOMAS, VI CAE CONTROLLED ATMOSPHERE ENCLOSURES INC CAF CALL-AMERICA OF FRESNO FRESNO, CA CAG CONAGRA INC OMAHA, NE CAH CC&H INC PLANO, TX CAI COMPUTER ASSOCIATES INC CAJ COMMUNICATIONS ALERT, INC. FT. WAYNE, IN CAK COMTEL OF CENTRAL ARKANSAS MEMPHIS, TN CAL CENTURY LONG DISTANCE(PREV. CENTURY AREA LONG LINES) LA CROSSE, WI CAM CALCOM RADIO TELEPHONE CAN CORTLAND ANSWERING SERVICE CAO CAMERON LONG DISTANCE SULPHUR, LA CAP CENTRAL ANSWERING AND PAGING MONROE, MI CAQ CAPITAL NETWORK SYSTEM INC (SUB OF AMNEX, INC) ORLANDO, FL CAR ATH COMMUNICATIONS DBA CALL AMERICA SANTA ANA, CA CAS COMMUNITY ANSWERING SERVICE INC CAT CAPITAL TELEPHONE CO INC CAU CAL AUTOFONE CAV CANAVERAL COMMUNICATIONS CAW COMPASS COMMUNICATIONS MUSCLE SHOALS, AL CAX CAM COM GILLETE, WY CAY USE IAC CODE ONM ENGLEWOOD, CO CAZ COM SYSTEM NETWORK SERVICES OF ARIZONA PHOENIX, AZ CBA WORLDCOM INC(PREV PRIMELINK COMMUNICATIONS) COLUMBIA, MO CBB CALL MOBILE LEXINGTON, KY CBC COASTAL BEND COMMUNICATIONS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–29 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CBD BROADWING TELECOMM. INC (PREV CINCINNATI BELL LONG CINCINATTI, OH DISTANCE) CBE CITY OF ABILENE ABILENE, TX CBF CARIBE COMMUNICATIONS AND TELEPHONE, INC. SAN JUAN, PR CBG LCC (PREV CAMBRIDGE COMMUNICATIONS GROUP INC) LUFKIN, JE CBH CALL AMERICA BULLHEAD RIVIERA, AZ CBI COMBINED TELCOM CBJ CMS (CELLULAR MOBILE SYSTEMS OF ST. CLOUD) ST. CLOUD, MN CBK CUT BANK COMMUNICATIONS CBL CYBERTEL INC CBM CINCINNATI BELL MESSAGING SERVICES CINCINNATI, OH CBN CITIBANK (NY NY) NY, NY CBO COLUMBIA COMMUNICATIONS INC. KENNEWICK, WA CBP CARIB COMM, L.P. MIAMI, FL CBQ CARIBBEAN TELECOMMUNICATIONS NEW YORK, NY CBR CALL-AMERICA OF BAKERSFIELD SANTA ANA, CA CBS CSI BILLING SERVICES INC DALLAS, TX CBT CRESTED BUTTE COMMUNICATIONS(PRE. 1988) CBU GST TELECOM (PREV GST CALL AMERICA & CALL AMERICAN BUS SAN LUIS OBISPO, CA COMMM CORP CBV CABLEVISION LIGHTPATH INC WOODBURY, NY CBW CABLE AND WIRELESS MANAGEMENT SERVICES CBX CRESTED BUTTE COMMUNICATIONS INC. (1994) AVON, CO CBY CELLULARONE OF SHELBY SHELBY, NC CBZ CINCINNATI BELL TELEPHONE COMPANY CINCINNATI, OH CCA COASTAL CAROLINA COMMUNICATIONS INC CCB COLUMBIA CELLULAR INC COLUMBIA, MO CCC C&C COMMUNICATIONS CCD CASCADE TELEPHONE COMMUNICATIONS CCE CONTEL CELLULAR INC FRESNO, CA CCF CELLULAR ONE OF CHARLESTOWN -RSA 6 N CHARLESTON, SC CCG CONTACT CORP (GREELEY) CCH CORPUS CHRISTI COMMUNICATIONS INC CORPUS CHRISTI, TX CCI CHERNOW COMMUNICATIONS INC CCJ COASTCOM INC GARDEN CITY, SC CCK CAPROCK COMMUNICATIONS HOBBS, NM CCL CURTIN CALL CCM CONTACT COMMUNICATIONS CCN CAR-TEL COMMUNICATIONS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–30 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CCO CALL-COMMUNICATIONS INC CCP COMMERCIAL COMMUNICATIONS COMPANY CCQ ALLTEL COMMUNICATIONS, INC (PREV. 360 LONG DISTANCE,INC) OMAHA, NE CCR COMMUNICATION CENTER INC CCS COMPREHENSIVE COMMUNICATIONS SYSTEMS INC (NEW NAME RTT) CCT CONTACT COLORADO SPRINGS INC CCU CENTRAL COMMUNICATIONS INC CCV MEDIAONE OF DELAWARE, INC(PREV CONTINENTAL CABLEVISION) SOUTHFIELD, MI CCW TELECOMMUNICATION OF CHARLESTON WV CHARLESTON, WV CCX CONROE-COMTEL INC COMROE, TX CCY CALL COMMUNICATIONS CALDWELL, TX CCZ COMMUNICATIONS CORP OF AMERICA PLYM MEETING, PA CDA COEUR D’ALENE CELLULAR ONE COEUR D’ALENE, ID CDB CANNON COMMUNICATIONS CORPORATION RED WING, MN CDC COMP-DATA COMMUNICATIONS SAN ANTONIO, TX CDD WORLDCOM INC (PREV. LDDS) TULSA, OK CDE COMMUNICATIONS DESIGN PORTLAND, ME CDF CITY WIDE PAGING WOODLAND HILLS, CA CDG CALL-AMERICA OF SAN DIEGO SAN DIEGO, CA CDH USE IAC CODE CCV ANDOVER, MA CDI COMMUNICATION DESIGN INC PORTLAND, ME CDJ COMINEX, L.L.C. EGG HARBOR TOWNSHIP, NJ CDK CRADDOCK TELESYSTEMS INC SANTA BARBARA, CA CDL CELLULAR ONE OF DANVILLE DANVILLE, IL CDM CARDINAL COMMUNICATION CORP. MONTICELLO, KY CDN USE IAC CODE IOR ST LOUIS, MO CDO CAL-COM RADIO TEL EL CENTRO, CA CDP CUMBERLAND CELLULAR PARTNERSHIP ATCO, NJ CDQ CONSUMER DATA SOLUTIONS IRVING, TX CDR COLORADO RIVER COMMUNICATIONS BULL HEAD CITY, AZ CDS CENTRAL DELIVERY SERVICE OF WASH INC CDT CARD TEL FT LAUDERDALE, FL CDU USE IAC CODE BNY DULUTH, MN CDV CORDOVA COMMUNICATIONS CDW COMMUNICATIONS WEST FORT BRAGG, CA CDX VALULINE LONG DISTANCE (PREV. CACTUS DIGITAL, INC.) ALBUQUERQUE, NM CDY CELLULAR ONE (CELLUDYNE LL) CANON CITY, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–31 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CDZ CONSOLIDATED COMMUNICATIONS PUBLIC SERVICES MATTOON, IL CEA CONTINENTAL DATA CENTER NEPTUNE, NJ CEB CARD ESTABLISHMENT SERVICES INC SIOUX FALLS, SD CEC CHARLES EDWARD CROWLEY CED CENTURION CAPE CHARLES, VA CEE COMTEL TELECOMMUNICATIONS MILWAUKEE, WI CEF CSW NET INC. DANVILLE, AR CEG COMMUNICATIONS ENGINEERING INC COLORADO SPRINGS, CO CEH RCN TELECOM SERVICES, INC(PREV RESIDENTIAL COMM. NETWORK PRINCETON, NJ INC) CEI KERN COMMUNICATIONS INC (PREV COMMUNICATIONS BAKERSFIELD, CA ENTERPRISES, INC) CEJ CHILL CELLULAR CORPORATION NEW YORK, NY CEK CENTRAL LINK OF MARLIN MARLIN, TX CEL CELLUTEL TUCEON, AZ CEM CELLULAR COMMUNICATIONS DULUTH, MN CEN CENTEX TELECOMMUNICATIONS INC CEO INTERNATIONAL CELLULAR INC(PREV CENTRON ATLANTA, GA TELECOMMUNICATIONS) CEP CONTACT OF EL PASO CEQ CENTEL NETWORK COMMUNICATIONS INC CHICAGO, IL CER COMMERCIAL COMMUNICATIONS INC CES COMMERCIAL ENGINEERING SERVICES GRANT ISLAND, NE CET COMMUNICATION ELECTRONIC CENTER INC CEU CELLULAR TELEPHONE COMPANY DBA AT&T WIRELESS SERVICES ROCHELLE PARK, NJ CEV CARONET, INC RESEARCH TRIANGLE PARK, NC CEW CELLULAR CONNECTION PALMDALE, CA CEX USE IAC CODE GMT DAVENPORT, IA CEY CENTURY COMMUNICATIONS CORP NEW CANAAN, CT CEZ CELLULAR TELEPHONE CO OF TOLEDO SOUTHFIELD, MI CFA ADELPHIA BUS SOLUTIONS OF JACKSONVILLE, INC (PREV HYPERION - JACKSONVILLE, FL JACK) CFB CRITICAL TECHNOLOGIES INC. SAN ANTONIO, TX CFC CONFERENCE CALL USA CFD COMTELCO/TMC KINGSPORT, TN CFE CALIFORNIA-OREGON TELEPHONE COMPANY DORRIS, CA CFF WORLDXCHANGE CORP (PREV CTS TELCOM OF FLORIDA) MIAMI, FL CFG CCT (CALIFORNIA CATALOG & TECHNOLOGY) LODI, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–32 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CFH CITIZENS MUTUAL TELEPHONE CO (PREV CITIZENS COMMUNICATION BLOOMFIELD, IA CO) CFI CALIFORNIA INTELECOM CORP II CFJ CEDAR FALLS UTILITIES CEDAR FALLS, IA CFK TELEPHONE COMPANY OF CENTRAL FLORIDA, INC. LAKEMARY, FL CFL CELLULAR ONE OF SIOUX FALLS SIOUX FALLS, SD CFM CABLE PLUS MANAGEMENT, INC. BELLEVUE, WA CFN CELFON INC ATLANTA, GA CFO CHICAGO FIBER OPTIC CORP CHICAGO, IL CFP CLIFTON PHONE SYSTEM CLEVELAND, OH CFQ CFW CELLULAR, INC. WAYNESBORO, VA CFR CFR CORPORATION CFS CANTOR FITZGERALD SECURITIES CORP NEW YORK, NY CFT CELLULAR ONE OF GREATER FORT WAYNE FORT WAYNE, IN CFU RRV ENTERPRISES, INC. DBA CONSUMER ACCESS 5120 WOODWAY DRIVE, TX CFV NEW CENTURY COMMUNICATION (PREV CENTURY INTERACTIVE FAX, DALLAS, TX INC) CFW CF-W TELEPHONE WAYNESBORO, VA CFX CALL FOR LESS LONG DISTANCE ARLINGTON, TX CFY CONFERENCE LINE SERVICES INC. INDEPENDENCE, OH CFZ CRYSTAL COMMUNICATIONS, INC. DBA HICKORYTECH MANKATO, MN CGA CAGAL CELLULAR COMMUNICATIONS CORP OAKLAND, CA CGB CONTACT PAGING ALBUQUERQUE, NM CGC COMMUNICATIONS SATELLITE CORP CGD CELLULAR LONG DISTANCE COMPANY KIRKLAND, WA CGE CELLULAR ONE OF NORTHEAST GEORGIA GAINESVILLE, GA CGF CA PAGING OAK PARK, MI CGG CENTRAL TELEMESSAGING SERVICES INC BEND, OR CGH CGH CELLULAR CORP OF PENNSYLVANIA NEW YORK, NY CGI COMMUNIGROUP INC CGJ CALL AMERICA LONG DISTANCE JACKSONVILLE, FL CGK COUGAR LONG DISTANCE ARLINGTON, TX CGL CAGLE COMMUNICATIONS INC CGM CARNEGIE-MELLON UNIVERSITY INC PITTSBURGH, PA CGN COMMUNIGROUP OF NORTH ALABAMA CGO CELLULAR ONE OF MACON GEORGIA FT MEYERS, FL CGP LCI INTERNATIONAL (PREV CORPORATE TELEMANAGEMENT GROUP) GREENVILLE, SC CGQ CGI CAPE CORAL, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–33 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CGR USE IAC CODE EQN HOUSTON, TX CGS CREG SYSTEMS CORP WATERTOWN, NY CGT GTE FEDERAL SYSTEMS DIVISION MC LEAN, VA CGU COST MANAGEMENT CONSULTANTS RICHBORO, PA CGV CUMBERLAND MOUNTAIN PAGING SERVICES MIDDLESBORO, KY CGW WINSTAR(PREV. COMMUNICATIONS GATEWAY NETWORK INC) TYSONS CORNER, VA CGX CHALLENGER CONSTRUCTION, INC. QULIN, MO CGY EXCEL TELECOMMUNICATIONS INC (PREV COMMUNICATIONS DALLAS, TX MANAGEMENT) CGZ C-COM (PREV. C & G ASSOCIATES) BOULDER, CO CHA CHASE TELECOM HARTFORD, CT CHB CHUBB GROUP OF INSURANCE COMPANIES WARREN, NJ CHC CHICO TELECOM FRESNO, CA CHD COMTECH INTERNATIONAL SEATTLE, WA CHE CONSUMER HEALTH SERVICES INC BOULDER, CO CHF I DON’T KNOW (PREV. CHOPIN TELCOM) KENNEDALE, TX CHG CHICAGO COMMUNICATION SERVICE INC FRANKLIN PARK, IL CHH CHAUTAUQUA & ERIE COMMUNICATIONS, INC. WESTFIELD, NY CHI CHIM CHIMNEY CHIMNEE SWEEP INC WEST BLOOMFIELD, MI CHJ CHOICE 1 COMMUNICATIONS CLEVELAND, OH CHK CHICKASAW LONG DISTANCE CO SULPHUR, OK CHL GST TELECOM (PREV ABC TELECOM,INC & COACHELLA VALLEY PALM DESERT, CA COMM) CHM USE IAC CODE PGN HAYWARD, CA CHN CONTEL TELEPHONE OPERATIONS SEYMOUR, IN CHO CHOICE INFO SYS LAKEWOOD, CO CHP CONSUMER HELP SERVICES INC BOULDER, CO CHQ CELLULAR ONE OF MARION AND HUNTINGTON MARION, IN CHR CHESTER LONG DISTANCE SERVICES INC CHESTER, SC CHS LOYD COMM DBA COMTEL OF HOT SPRINGS HOT SPRINGS, AR CHT CHURCH TELEPHONE ANSWERING SVC CHU COMTEL OF HOUSTON HOUSTON, TX CHV CHRISTINE LD SERVICE WEST STOCKBRIDGE, MA CHW CHAWILLA CHX CHARLOTTE AXS CHARLOTTE, NC CHY CHERRY COMMUNICATIONS DOWNERS GROVE, IL CHZ COMTECH NETWORK SYSTEMS GROUP INC ST LOUIS, MO CIA CELINA TELECOM CELINA, OH CIB CARIBBEAN TELEPHONE & TELEGRAPH INC DEARBORN, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–34 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CIC CITIDEL COMMUNICATIONS SYSTEMS SAN DIEGO, CA CID CONTEL OF INDIANA SEYMOUR, IN CIE COMPUTER SCIENCES INC EL SEGUNDO, CA CIF CELLULAR INFORMATION SYSTEMS INC ENGLEWOOD, CO CIG CIGNAL COMMUNICATIONS METARIRIE, LA CIH COMMUNICATIONS PROPERTIES, INC. SPRINGDALE, AR CII COMTEL SYSTEMS FAYETTEVILLE, AR CIJ CCIC DALLAS, TX CIK CELLULINK APPLETON, WI CIL COMSAT INTERNATIONAL COMMUNICATIONS INC WASHINGTON, DC CIM CONTICOMM INC ENGLEWOOD, CO CIN EQUALNET CORPORATION (PREV OPERATOR SERVICES CO & CONTEL) LUBBOCK, TX CIO CTA COMMUNICATIONS CANBY, OR CIP UNITED TECHNOLOGICAL SYSTEMS,INC (PREV CARRIER CONCEPTS DALLAS, TX INTL CORP CIQ COMMUNICATIONS PARTNERSHIP INTERNATIONAL SAN FRANCISCO, CA CIR CARRIER PAGING SYSTEMS INC WEST BABYLON, NY CIS VTA INC BETHSEDA, MD CIT COMMUNITRONICS INC CIU COMMUNICATIONS UNLIMITED DENVER, CO CIV CELLULAR ONE OF THE ILLINOIS VALLEY LA SALLE, IL CIW CELLULAR OF INDIANA VINCENNES, IN CIX COMMUNICATIONS MAINTENANCE INC INDIANAPOLIS, IN CIY CITY TELECOM INC. SCARBOROUGH, ON CIZ COAST INTERNATIONAL INC OVERLAND PARK, KS CJA CENTENNIAL COMMUNICATIONS, INC. SAN JUAN, PR CJB COMMUNICATION CONCEPTS INC. D/B/A VOICE-TEL BOSTON WELLESLEY HILLS, MA CJC CSH CELLULAR, INC. NEWPORT BEACH, CA CJD CJD WISCONSIN CELLULAR CORP FAIRFIELD, CA CJE CELLNET COMMUNICATIONS CORPORATION AURORA, CO CJF CALL FOR LESS OSHAWA, ON CJG THE CONCORD TELEPHONE COMPANY CONCORD, NC CJH CHEQUAMEGON TELEPHONE COOPERATIVE, INC. CABLE, WI CJI COXCOM, INC. (PREV. COX COMMUNICATIONS, INC.) ATLANTA, GA CJJ CALTECH INTERNATIONAL TELECOM CORPORATION WALNUT CREEK, CA CJK C.C.I. COMMUNICATION SPECIALISTS, INC. ROSEVILLE, CA CJL ZENEX LONG DISTANCE EDMOND, OK CJM CLEARNET COMMUNICATIONS INC PICKERING, ON

Proprietary — Licensed Material See proprietary restrictions on title page. 9–35 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CJN CCN WASHINGTON, DC CJO CST COMMUNICATIONS, INC. (PREV. CENTRAL SCOTT TELEPHONE ELDRIDGE, IA COMPANY) CJP CHIBARDUN TELEPHONE COOPERATIVE, INC. DALLAS, WI CJQ COMTEX COMMUNICATIONS INC WAXAHACHIE, TX CJR CRESCENT COMMUNICATIONS HOUSTON, TX CJS CMS COMMUNICATIONS, L.L.C. CLIMAX, MI CJT COOPERATIVE TELEPHONE COMPANY VICTOR, IA CJU CONNECTICUT TELEPHONE AND COMMUNICATIONS SYSTEMS, INC. WALLINGFORD, CT CJV CHINESE MEDIA GROUP, LLC SAN MATEO, CA CJW CELLULAR OF UPSTATE NEW YORK INC DELMAR, NY CJX CENTRAL TEXAS COMMUNICATIONS, INC. GOLDTHWAITE, TX CJY KNOLOGY HOLDINGS, INC (PREV CYBERNET HOLDING, INC.) WEST POINT, GA CJZ CITIZENS TELEPHONE COOPERATIVE FLOYD, VA CKA CELLPAGE AZUSA, C CKB CELLULAR RENTALS, INC. HARRISBURG, PA CKC COOK COMMUNICATIONS FRESNO, CA CKD CLARKSDALE MOBILEPHONE CKE CELLULAR ONE OF SOUTHEAST KENTUCKY CORBIN, KY CKF CAPROCK FIBER NETWORK LTD DALLAS, TX CKG CENTRAL LINK SATELLITE PAGING WACO, TX CKH CITILINK OF UTAH, LLC WEST JORDAN, UT CKI C&K INVESTMENTS INC CKJ CITIZENS TELEPHONE COOPERATIVE, INC. NEW AUBURN, WI CKK COMLITE, INC. NEW YORK, NY CKL CAPROCK CELLULAR LIMITED PARTNERSHIP LUBBOCK, TX CKM BEST CHOICE LONG DISTANCE COMPANY INC CASCADE, IA CKN CLEAR NETWORK, INC. DBA CLEARNET SANTA MONICA, CA CKO CAP ROCK TELECOMMUNICATIONS SPUR, TX CKP CL TEL LONG DISTANCE, INC.(PREV. CLEAR LAKE INDEPENDENT TEL. CLEAR LAKE, IA CO) CKQ CELLULAR ONE OF SOUTHWEST OKLAHOMA WICHITA FALLS, TX CKR CHECKRITE CORPUS CHRISTI, TX CKS CENTRAL LINK SYSTEMS WACO, TX CKT COOK TELECOM INC OF SAN DIEGO SAN RAFAEL, CA CKU COMLINK USA MISSION VIEJO, CA CKV CROSSCHECK, INC. ROHNERT PARK, CA CKW CHICKASAW PERSONAL COMMUNICATIONS SULPHUR, OK CKX LATATEL DE AMERICA, INC (PREV. CALL US INC) NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–36 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CKY COMM-KEY INC CKZ CELLULAR ONE KALAMAZOO KALAMAZOO, MI CLA COMTEL OF ARKANSAS JONESBOROUGH, AR CLB COLUMBIA BEND CORPORATION CLC COASTAL COMMUNICATIONS CLD COSHOCTON LONG DISTANCE SERVICE COSHOCTON, OH CLE CLEVELAND MOBILE TELEPHONE INC CLF CALIFORNIA 9 CELLULAR CORP SAN FRANCISCO, CA CLG COLGAN COMMUNICATIONS CLH CALL HOME AMERICA AUSTIN, TX CLI COM-LINE CLJ CALLING CARD COMPANY, INC. ENGLEWOOD CLIFFS, NJ CLK CLEARLAKE COMMUNICATIONS CLL CALLPAGE INC CLM COMVEST LONG LINES OF MONTEREY FRESNO, CA CLN COLLINS COMMUNICATIONS CLO UNITED STATES CELLULAR CORP TULSA, OK CLP COLUMBIA PAGING CLQ CELLULAR ONE COLUMBIA, SC CLR COLORADO MOBILE COMMUNICATIONS CLS CHARLES L SLOCUM CLT COLLEGE TOWN BRAINTREE, MA CLU CALL USA POCATELLO, ID CLV CAL-VADA MICROWAVE INC SACRAMENTO, CA CLW COMMNET CELLULAR, INC. (PREV. CELLULAR, INC.) ENGLEWOOD, CO CLX CALL-EX INTERNATION INC CLY CENTRAL TELEPHONE SYSTEMS FARGO, ND CLZ CENTRAL COAST TELEPHONE CMA GST TELECOM (PREV TEL-OPTIC, INC DBA UNIVERSAL NETWORK FAYETTEVILLE, AR SVCS) CMB CAMDEN MOBLE COMMUNICATIONS INC CMC COMMUNICATIONS MARKETING CO CMD COMMUNICATIONS SPECIALISTS COMPANY (DAYTONA BEACH) CME COMMUNICATION ENGINEERING COMPANY INC CMF CENTRAL MOBILEFONE CMG COMMUNICATIONS MANAGEMENT INC GEORGETOWN, SC CMH CALL-AMERICA MILLER HILLIER FAIRFIELD, AK CMI COASTAL AUTOMATED COMMUNICATIONS INC WILMINGTON, DE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–37 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CMJ VARTEC TELECOM DBA CLEAR CHOICE(PREV. CLEAR CHOICE LANCASTER, TX COMMUNICATIONS CMK COMTEL SYSTEMS OF MILWAUKEE CML WORLDCOM, INC(PREV TEXAS NATIONAL TELECOMS INC) NEW BRAUNFELS, TX CMM COMBINED MARK INC CMN COM-NAV D/B/A RADIO TELEPHONE MARINE CMO CYBERTEL CORPORATION (PREV CYBERTEL MISSOURI) SCHAUMBURG, IL CMP CENTRAL MOBILPHONE CMQ CALL AMERICA MONTANA BOZEMAN, MT CMR CENTRAL MOBILE RADIO CMS COMMUNICATIONS SPECIALISTS COMPANY CMT COMPUTE-A-CALL INTERNATIONAL INC SALT LAKE CITY, UT CMU COMMUNICATIONS INC CMV COMSERV CORP CAPPARRA HTS, PR CMW COMMONWEALTH TELEPHONE COMPANY DALLAS, PA CMX COMEX INC CMY COMMUNITY PAGING CORP LEXINGTON, NE CMZ COMEX (SAN FRAN) SAN FRAN, CA CNA COMTEL SYSTEMS OF NORTHWEST ARKANSAS SPRINGDALE, AR CNB COMSOUTH TELESERVICES, INC(PREV. CENTRAL TELECOM, INC) HAWKINSVILLE, GA CNC CASCADE NETWORK CORP CND CONCORD TELEPHONE LONG DISTANCE CO CONCORD, NC CNE COMNET PORTLAND, OR CNF CONTEL CELLULAR - NORFOLK ATLANTA, GA CNG COMMUNICATION TRANSMITTING SERVICE ANAHEIM, CA CNH CORNHUSKER PAGING INC COLUMBUS, NE CNI COMBINED NETWORK INC CNJ CONSOLIDATED TECHNOLOGIES INC. VANCOUVER, BC CNK BROADWING TELECOMMUNICATIONS. INC (PREV ECLIPSE AUSTIN, TX TELECOMM) CNL CONTEL CELLULAR OF EL PASO INC ATLANTA, GA CNM COM NAV MARINE JACKSON, MI CNN CAROLINA METRONET RALEIGH, NC CNO WORLDCOM INC. (PREV. LDDS) TULSA, OK CNP CENTRAL MOBILE & PAGING CNQ COMANTEL INC FREDONIA, NY CNR CENTANA RADIO COMMUNICATIONS CNS COMPATH NETWORK SERVICES INC CNT CON-TAC COMMUNICATIONS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–38 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CNU CANTON CELLULAR COLUMBUS, OH CNV CELLULAR ONE OF STAUNTON STAUNTON, VA CNW COMMONWEALTH TELECOMMUNICATIONS INC CNX C & C COMMUNICATIONS OF NEW MEXICO CNY CHAYCE ‘N’ YOU CNZ CAM-NET INC SEATTLE, WA COA CONTACT AMERICA CHILLICOTHE, MO COB CELLULAR ONE OF BERRIEN COUNTY ST JOSEPH, MI COC CONTACT COMMUNICATIONS INC(PREV. PRONET COMMUNICATIONS) DALLAS, TX COD COMTEL TECH DALLAS, TX COE MCI METRO ACCESS TRANSMISSION (PREV BCS L.D. SERIVCE MADISON, WI TELECOM*USA) COF CENTRAL OFFICE CONSULTANTS PROVO, UT COG CELLULAR ONE OF ORANGE COUNTY NEWBURGH, NY COH CELLULAR ONE OF CHICO CHICO, CA COI CONNECT/ONE COMMUNICATIONS INC HUDSON, OH COJ CIMCO COMMUNICATIONS INC. OAKBROOK TERRACE, IL COK WORLDCOM INC. (PREV. LDDS) TULSA, OK COL COALINGA RADIO TELEPHONE COM COMET COMMUNICATIONS INC CON CONTROL TEL INC COO COASTAL PAGING CORP MYRTLE BEACH, SC COP COMMUNICATIONS PROPERTIES INC MUSKOGEE, OK COQ CAL-ONE CELLULAR L P FORT JONES, CA COR COMMERCIAL RADIO INC COS BROADWING TELECOMMUNICATIONS INC (PRE ECLIPSE TELECOMM, AUSTIN, TX INC) COT COM-TEC INC COU COMMAN TELEPHONE FREDONIA, NY COV COLLECTIVE COMMUNICATIONS SERVICES INC. CONSHOHOOKEN, PA COW CELLULAR ONE OF WICHITA FALLS WICHITA FALLS, TX COX COM CENTRAL TAMPA, FL COY COMMONWEALTH TELECOM, INC. ROWLETT, TX COZ COM-MAR INC MARSHALL, TX CPA COMMONWEALTH OF PENNSYLVANIA HARRISBURG, PA CPB COMTEL OF PINE BLUFF INC PINE BLUFF, AR CPC COMPUTER CONCEPTS CORPORATION LENEXA, KS CPD CALL-AMERICA OF PALM DESERT PALM DESERT, CA CPE COMMUNICATIONS EQUIPMENT INC INDEPENDENCE, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–39 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CPF CELLULAR PACIFIC HONOLULU, HI CPG CARMODY’S RADIO PAGING SERVICE INC CPH CANNON MOBILE PHONE INC CPI COMPUSALTANTS INC CPJ CELTRONICS PAGING DALLAS, TX CPK CAPROCK RADIO DISPATCH CPL CAPITAL TELECOMMUNICATIONS INC CPM COMBINED PAGING AND MOBILE CPN C P NATIONAL (AMERICAN NETWORK) PORTLAND, OR CPO CTC COMMUNICATIONS CORP. (PREV COMPUTER TELEPHONE CORP) WALTHAM, MA CPP CLARKE MOBILEPHONE AND PAGING INC CPQ COMPUSERVE COLUMBUS, OH CPR CAPITOL RADIO TELEPHONE CHARLESTON, WV CPS COMPUSERVE INC CPT CAPITAL ANS SERVICE CPU COMPUTEL INC ADA, OK CPV COOPERATIVE COMM. INC (PREV COOP. LONG DISTANCE SERVICES BELLEVILLE, NJ INC) CPW COMMUNICATIONS OPTIONS INC NEWARK, OH CPX CROSSPOINT COMMUNICATIONS CORP LONG BEACH, CA CPY C & P TELEPHONE CO OF MARYLAND BALTIMORE, MD CPZ CAPITAL TELECOM OF MARYLAND CQA CONNECT AMERICA COMMUNICATIONS INC SAN ANTONIO, TX CQB CONNECT AMERICOM CORP SAN ANTONIO, TX CQC COX CABLE TWIN CITIES MOLINE, IL CQD CONQUEST LONG DISTANCE COMPANY COLUMBUS, OH CQE MIDCOM COMMUNICATIONS INC. SOUTHFIELD, MI CQF CMC TELECOM, INC. FARMINGTON HILLS, MI CQG COMANCHE COUNTY LONG DISTANCE DELEON, TX CQH COLORADO HI-TEK INC PAGOSA SPRINGS, CO CQI CELLULAR ONE OF CLINTON CLINTON, IA CQJ CARAWAY COMMUNICATIONS, INC. DALLAS, TX CQK CENTERCOM ARKANSAS L.P. BARTLESVILLE, OK CQL COLONIAL ENTERPRISE INC PANAMA CITY, FL CQM CONESTOGA MOBILE SYSTEMS INC BIRDSBORO, PA CQN COMMUNICATIONS ASSOCIATES SPRINGFIELD, MS CQO CONQUEST OPERATOR SERVICES CORP DUBLIN, OH CQP COMMLINE PAGING SERVICE LA GRANDE, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 9–40 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CQQ C C ENTERPRISES DALLAS, TX CQR CELLULAR ONE OF NORFOLK NORFOLK, NE CQS CORRECTIONAL COMMUNICATIONS CORP INC SAN RAMON, CA CQT CHAUTAUQUA TELESAVER DUNKIRK, NY CQU CONQUEST COMMUNICATIONS CORP COLUMBUS, OH CQV COMMONWEALTH TELECOM SERVICES INC (PREV COMMONWEALTH WILKES BARRE, PA COMM. INC) CQW CELLULAR ONE GREAT LAKES OF IOWA SPENCER, IA CQX COMTEL SYSTEMS INC SPOKANE, WA CQY CELLTEL SYSTEMS INC EDEN PRAIRIE, MN CQZ COMMUNIQUE CO PALM HARBOR, FL CRA CALL AMERICA GROUP MARSHFIELD, WI CRB CHARLES R BRALEY III WASHINGTON, DC CRC COMMUNICATIONS RESALE CORP CRD CENTRAL RADIO DISPATCH INC CRE CARRIER COMMUNICATIONS LANCASTER, CA CRF CELLULAR ONE OF ROCKFORD DANBURY, CT CRG CCI COMMUNICATIONS ATLANTA, GA CRH CONTEL CELLULAR - RICHMOND ATLANTA, GA CRI CRITERION TEL CORP HOUSTON, TX CRJ CLAIRCOM COMMUNICATIONS SEATTLE, WA CRK CORRNET CORRECTIONAL NETWORK INC PHOENIX, AZ CRL CORAL COMMUNICATIONS CRM CONSORTIUM COMMUNICATIONS INC CRN CHARLES ROTKIN (DBA- NORTHEAST COMMUNICATIONS) CRO COLLINS RADIO COMMUNICATIONS INC CRP CENTRAL RADIOPHONE CRQ CENTRAL LINES FAIRMONT, MN CRR USE IAC CODE GMT ROCKFORD, IL CRS CELLULAR RADIO SERVICE CRT CINCINNATI RADIO TELEPHONE CRU CROSS COUNTRY CELLULAR INC CINCINNATI, OH CRV CALL-AMERICA OF RIVERSIDE RIVERSIDE, CA CRW CRESTWOOD COMPANIES INC CRX COMMAR INC SANTA ROSA, CA CRY CENTURY CELLUNET TEXARKANA, TX CRZ CLEARTEL COMMUNICATIONS WASHINGTON, DC CSA COMVEST LONG LINES OF SANTA ANA SANTA, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–41 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CSB COMTEL SYSTEM OF BILLINGS MONTANA, MT CSC CACTUS COMMUNICATIONS INC CSD CONSOLIDATE TELEPHONE COOPERATIVE DICKENSON, ND CSE CONIFER COMMUNICATIONS LTD VAIL, CO CSF CALL SAVERS OF FRESNO FRESNO, CA CSG MC CELLULAR SPRINGFIELD, MO CSH COMMUNICATIONS SALES & SERVICE INC WEATHERLAND, TX CSI COMMANDER SYSTEMS INC CSJ COMMUNICATIONS SYSTEMS INTERNATIONAL, INC. COLORADO SPRINGS, CO CSK COMVEST LONG LINES OF STOCKTON FRESNO, CA CSL COMMUNICATIONS SPECIALISTS INC CSM CUSTOM RADIO CSN COMVEST TELECOMMUNICATIONS INC CSO CELL SOUTH TRENTON, NJ CSP COMMUNICATIONS SPECIALISTS CO INC CSQ CALL SAVER WILMINGTON, NC CSR COMMUNICATIONS CENTER INC CSS COMMUNICATIONS SYSTEMS NETWORK SERVICES CST COMSTAR COMMUNICATIONS CSU AT&T WIRELESS SERVICES OF CALIFORNIA INC (PREV CONSTITUTION FAIRFIELD, CA CELL) CSV CALL SAVE CSW CONTINENTAL SWITCHING CORP CEDAR HILL, TX CSX COMCAST CELLULAR PHILADELPHIA, PA CSY USE IAC CODE ILO NEW BRAUNFELS, TX CSZ CELLULAR MOBILE SERVICE HUSTON, TX CTA COLUMBIA TELEPHONE ANSWERING SERVICE CTB CITIBANK (S DAKOTA N A ) SOUIX FALLS, SD CTC CONTRACT COMMUNICATIONS INC CTD CONTACT DENVER CTE CENTRAL RADIO TELEPHONE CTF CORESTATES FINANCIAL CORP PHILADELPHIA, PA CTG CALL TECHNOLOGY CORP OF PHILA ARDMORE, PA CTH COMM TECHS COMMUNICATIONS TEXARKANNA, AR CTI CONTACT COMMUNICATIONS INC CTJ CELLULAR ONE OF TRI-STATE GREENSBORO, NC CTK CENTRAL NEW YORK TALK TRANSIT CORTLAND, NY CTL CENTRAL MOBILE RADIO PHONE SERVICE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–42 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CTM CONTACT NEW MEXICO INC CTN CURTIN CALL CORPORATION CTO BROADWING TELECOMMUNICATIONS INC (PREV CINCINNATI BELL CINCINNATI, OH LONG DIST) CTP CENTRAL PAGING INC CHAMPAIGN, IL CTQ CYPRESS TELECOMMUNICATIONS CORP (CYTEL) HOUSTON, TX CTR CENTRAL COMMUNICATIONS CTS COMTEL SOUTH CTT CONTACT INC BALTIMORE, MD CTU COMTEL SYSTEMS OF TULSA TULSA, OK CTV CREATIVE TELECOMMUNICATIONS INC CTW COMMERCE TWO-WAY RADIO CTX COMTRONEX INC CTY CURTERY ANSWERING SERVICE CTZ CTI (COMPANY) CUA CALL USA (DALLAS) DALLAS, TX CUB CELLULAR ONE OF BROOKINGS BROOKINGS, SD CUC CUSTOM COMMUNICATIONS HOLLAND, MI CUD CALL US CORP SAN JUAN, PR CUE CELUTEL INC MC ALLEN, TX CUF USE IAC CODE CUY NEPTUNE, NJ CUG CELLULAR ONE OF GREENWOOD GREENWOOD, SC CUH CC COMMUNICATIONS (PREV CHURCHILL COUNTY TELEPHONE) FALLON, NV CUI WORLDCOM, INC(PREV CALL US INC) KNOXVILLE, TN CUJ CALLUM LONG DISTANCE DALLAS, TX CUK CALL US OF KENTUCKY CUL CORECOMM (PREV OCOM LONG DISTANCE ) SEE - ALSO LUL WORTHINGTON, OH CUM NEW PAR DBA AIRTOUCH CELLULAR (PREV COLUMBUS CELL COLUMBUS, OH TELEPHONE CO) CUN COMMUNITEL INC SAN FRANCISCO, CA CUO CELLULAR ONE OF AUSTIN AUSTIN, TX CUP CELLULAR PLUS WILKES-BARRE, PA CUQ COMMUNITY TELEPHONE NETWORK INC LOS ANGELES, CA CUR COURTESY COMMUNICATIONS SPOKANE, WA CUS DEFAULT VALUE FOR CASUAL CUSTOMER. NOT A VALID IAC CODE. CUT COMPUTE-A-CALL SPRINGFIELD, MO CUU MIDWEST WIRELESS COMMUNICATIONS, L.L.C. DBA CELLULAR 2000 MANKATO, MN CUV COMMUNIVERSE INC MIAMI, FL CUW COMMUNITY TELEPHONE MUSKEGAN, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–43 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CUX COMPU-TEL INC SOUIX CITY, SD CUY CENTENNIAL CELLULAR CORP (PREV CENTURY CELLULAR CORP) NEPTUNE, NJ CUZ EXTELCOM DBA EXPRESS TEL (PREV. THRIFTY TELEPHONE) SALT LAKE CITY, UT CVA COEUR D’ALENE ANSWERING SERVICE, INC. SPOKANE, WA CVB COMVEST LONG LINES OF BAKERSFIELD FRESNO, CA CVC PRIMUS TELECOMMUNICATIONS CANADA (PREV CAM-NET COMM INC) VANCOUVER, BC CVD CHARITON VALLEY L.D. CORPORATION BUCKLIN, MO CVE CLEVELAND MOBILE TELCO OF NJ CVF COMVEST LONG LINES OF CALIFORNIA FRESNO, CA CVG COMMUNICATION SAVINGS INC. MOBILE, AL CVH CROSS-VALLIANT CELLULAR PARTNERSHIP WARNER, OK CVI CARRIER SERVICES CORP PORT ORANGE, FL CVJ CONESTOGA TELEPHONE AND TELEGRAPH CO. BIRDSBORO, PA CVK COMAV CORPORATION BOSTON, MA CVL CARLOS V LANGSTON CVM COMVEST LONG LINES OF MODESTO FRESNO, CA CVN CELLULAR VENTURES INC WEST BLOOMFIELD, MI CVO CORPORATE SERVICES/TELCOM LAWRENCE, MA CVP COMMUNICATION 1 CORP BRONX, NY CVQ CELLULAR 29 LINCOLN, NE CVR CALAVERAS TELEPHONE CO COPPEROPOLIS, CA CVS COMVEST LONG LINES OF SACRAMENTO FRESNO, CA CVT COMVEST NETWORK INC FRESNO, CA CVU COMMUNICATIONS VENTURES INC SCOTTSDALE, AZ CVV COMVEST LONG LINES OF VISALIA FRESNO, CA CVW C-NET COMMUNICATIONS (PREV. CELLNET TELECOMMUNICATIONS) MADISON HEIGHTS, MI CVX CELLNET CELLULAR SERVICE BEACHWOOD, OH CVY COMMUNICATIONS SERVICE COMPANY ALAMOGORDO, NM CVZ CARIBSAT TELECOMMUNICATIONS INC. (PREV. COMSERV TELECOM. SAN JUAN, PR INC.) CWA C&W DATAAMERICA FAIRFAX, VA CWB CELLULAR ONE WILMINGTON/BALTIMORE GREENBALT, MD CWC C&W COMMUNICATIONS INC CWD CITY-WIDE ELECTRONICS FRESNO, CA CWE CENTRAL STATES MICROWAVE TRANSMISSION CO HARRISONVILLE, MO CWF CONETCO COMMUNICATIONS CORPORATION NEW YORK, NY CWG CONTINENTAL LONG DISTNACE SPRING BRANCH, TX CWH COMPUSWITCH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–44 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CWI CABLE & WIRELESS VIENNA, VA CWJ MISSISSIPPI-1 CELLULAR TELEPHONE COMPANY, INC. LAKE CHARLES, LA CWK LCI INTERNATIONAL (PREV CHARTER NETWORK) SAVANNAH, GA CWL CABLE AND WIRELESS INTERNATIONAL MC CLEAN, VA CWM COLORADO WEST MOBILE PHONE CWN COMMUNICATION SERVICES AMERICA MOUNTAIN VIEW, CA CWO INTEL COMMUNICATIONS (PREV. CLOCKWORK COMMUNICATIONS) LONGVIEW, TX CWP CELLULAR ONE OF WILLIAMSPORT GREENSBORO, NC CWQ COMMONWEALTH TELCOM INC ENCINO, CA CWR CABLE & WIRELESS TELECOMMUNICATIONS MISSISSAUGA, ON CWS COMWEST COMMUNICATIONS PHOENIX, AZ CWT CONTACT OF WASHINGTON INC BALTIMORE, MD CWU COMMUNICATIONS CONNECTIONS CORP OF AMERICA MINNEAPOLIS, MN CWV XO PENNSYLVANIA, INC (PREV CHADWICK TELEPHONE) ALLENTOWN, PA CWW CELL CALL NETWORK LEXINGTON, KY CWX CROWN TOWER SYSTEMS INC LEES SUMMIT, MO CWY CROWLEY CELLULAR DEVELOPMENT CORP WAXO, TX CWZ RCN LONG DISTANCE COMPANY(PREV COMMONWEALTH LONG DALLAS, PA DISTANCE CO) CXA CELLULAR ONE OF MID SOUTH TEXAS EL CAMPO, TX CXB CCI PR RSA, INC. GUAYNABO, PR CXC CENTREX COMMUNICATIONS INC CXD COMMTRONIX COMMUNICATIONS AND ELECTRONICS LAKE VILLAGE, AR CXE CENTRAL TELEPHONE CO PLANO, TX CXF USE IAC CODE CJI OKLAHOMA CITY, OK CXG CRX SERVICE COMPANY DALLAS, TX CXH CENTRAL OREGON CELLULAR, INC. SALT LAKE CITY, UT CXI CUSTOM TELECONNECT, INC. LAS VEGAS, NV CXJ USE IAC CODE CJI IRVIN, CA CXK COOK COMMUNICATIONS CORP LITTLETON, CO CXL CELLTOLL CORP GLENDALE, CA CXM WORLDXCHANGE CORP (PREV WORLDXCHANGE) SAN DIEGO, CA CXN PRIME AXXESS (PREV CONNNET PACKET) MERIDEN, CT CXO CONTINENTAL LONG DISTANCE HACKESSIN, DE CXP UNIVERSAL PACIFIC COMMUNICATIONS, INC., DBA CAL PACIFIC ENCINO, CA COMM. CXQ CENTURY COMMUNICATIONS DALLAS, TX CXR CLEAR COMMUNICATIONS GROUP ATLANTA, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–45 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CXS ENHANCED SERVICES BILLING INC(PREV. CENTRAL TEXAS LONG CORPUS CHRISTI, TX DISTANCE) CXT CENTREX TELEMANAGEMENT INC SAN FRANCISCO, CA CXU CENCALL COMMUNICATIONS CORP DENVER, CO CXV CMT PARTNERS DBA CELLULAR ONE OVERLAND PARK, KS CXW CIMARRON TOWERS INC OKLAHOMA CITY, OK CXX CONNECTNET AMARILLO, TX CXY COMM NET SERVICES CORP PLANO, TX CXZ CELLCOM GREEN BAY, WI CYA CITY CAL PRAIRIE DU CHIEN, WI CYB RSL COM U.S.A. (PREV CYBERLINK INTERNATIONAL) WOODLAND HILLS, CA CYC CENTURY CELLUNET LANSING, MI CYD COMMUNITY LONG DISTANCE INC ROCK HILL, SC CYE CORNEY’S ELECTRONICS INC. ORISKANY, NY CYF CRYSTAL COMM UBORO, MA CYG BROOKS FIBER PROPERTIES(PREV. CITY SIGNAL INC.) GRAND RAPIDS, MI CYH CAYUGA TELEPHONE COMPANY SYRACUSE, NY CYI COASTAL BAY COMMUNICATIONS, INC. HOUSTON, TX CYJ COMMUNICATIONS BUYING GROUP, INC. BEACHWOOD, OH CYK COLORADO CITY LINK KAYSVILLE, UT CYL CELLULAR ONE OF TYLER TYLER, TX CYM COUNTY OF MOMTGOMERY, COMMUNICATIONS DIV EAGLEVILLE, PA CYN CENTURY NETWORK INC SALT LAKE CITY, UT CYO COMMUNICATIONS TECHNOLOGY GROUP ENGLWOOD, NJ CYP CATHY PAGING INC WICHITA, KS CYQ CORPORATE COMMUNICATION CONSULTANTS INC VIRGINIA BEACH, VA CYR CYBERTECH COMMUNICATIONS CORP NORTHFIELD, IL CYS COMTEL SYSTEMS SPRINGDALE, AR CYT WORLDCOM INC. (PREV. LDDS) TULSA, OK CYU CITYNET COMMUNICATIONS INC WEST BLOOMFIELD, MI CYV CENTRAL PAYPHONE SERVICES, INC. ROSWELL, GA CYW CURRY COMMUNICATIONS MONROEVILLE, PA CYX CYBERNET COMMUNICATIONS, INC. LOS ANGELES, CA CYY COM SYSTEMS WESTLAKE VILLAGE, CA CYZ CALIFORNIA STATE LOTTERY SACRAMENTO, CA CZA COMSAT WASHINGTON, DC CZB BAYFONE OF TAMPA DBA AT&T WIRELESS SERVICES TAMPA, FL CZC CONTACT COMMUNICATIONS MANHASSET, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–46 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location CZD COASTAL LONG DISTANCE SERVICES INC HINESVILLE, GA CZE CITIZENS LONG DISTANCE CO. (PREV. CITIZENS UTILITIES) REDDING, CA CZF CITIZENS LONG DISTANCE CO. MAMMOTH, PA CZG CORPORATE COMMUNICATIONS GROUP, INC. CORAL GABLES, FL CZH TELEPHONE TOWNHALL MEETINGS, INC. (PREV. CPH NEWPORT BEACH, CA TELEMANAGEMENT, INC) CZI C & I COMMUNICATIONS COOKEVILLE, TN CZJ CITIZENS COMMUNICATIONS (PREV CITIZENS TELECOMMUNICATIONS DALLAS, TX CO.) CZK CLARK COMMUNICATIONS LEWISTON, ID CZL COMPLETE COMMUNICATIONS INC ENID, OK CZM CORCOM OKLAHOMA CITY, OK CZN CITIZENS SYSTEM CELINA, OH CZO CELLULAR ONE BECKLEY, WV CZP CAPITAL COMMUNICATIONS COOPERATIVE MANASSAS, VA CZQ VERIZON SELECT SERVICES INC (PREV GTE COMMUNICATIONS CORP) VICTORVILLE, CA CZR CHALLENGER NETWORK INC SLIDELL, LA CZS COMMUNICATIONS SPECIALIST RADIO TELPAGE DOTHAN, AL CZT CORPORATE TELECOM INC RICHARDSON, TX CZU USE IAC CODE QRV JACKSON, MS CZV CELLULAR SERVICE INC GLENDALE, CA CZW CELLWAVE INC CLEVELAND, OH CZX CITIZENS COMMUNICATIONS (PREV CITIZENS TELECOM) DALLAS, TX CZY CRYSTAL CLEAR PAGING SAN ANTONIO, TX CZZ STAR TELE. INC DBA ALLSTAR TELECOM ( PREV UNITED DIGITAL IRVINE, TX NETWORK DAA DAMACOM OAKBROOK, IL DAB DIAL-A-BEEPER INC BROOKLYN, NY DAC DIGITAL PAGING SYSTEM OF ATLANTIC CITY DAD DISCOUNT AMERICA LONG DISTANCE, INC. SAN MARCOS, TX DAE THE DARIEN TELEPHONE CO DARIEN, GA DAG DAG INC DAH DELTA PHONES, INC. DELHI, LA DAI DIALALOT.COM, INC. WHITEHOUSE STATION, NJ DAJ DANTIS INC CHICAGO, IL DAK DIALINK MOUNTAIN VIEW, CA DAL DIAL PAGE SANTA BARBARA, CA DAM DIAL AMERICA INC CAMDEN, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 9–47 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DAN DAN COMM CINCINNATI, OH DAO DACOM CORPORATION SEOUL, KO DAP DIAL-A-PAGE INC DAR DISCOUNT LONG DISTANCE OF AMERICA ST LOUIS, MO DAS DATA NET SYSTEMS, L.L.C. BUFFALO GROVE, IL DAT DISCOUNT ALTERNATIVE TELEPHONE SVC DAV DIGITAL TELEVISION SERVICES, INC. MONTGOMERY, IN DAX DIALMEX MCALLEN, TX DAY DAYTONA TELEPHONE COMPANY BARTLETT, TN DBC DOBSON CELLULAR OF CALIFORNIA, INC. OKLAHOMA CITY, OK DBE DELCAMBRE TELEPHONE COMPANY INC DELCAMBRE, LA DBF DOBSON FIBER COMPANY, INC. OKLAHOMA CITY, OK DBI DOBSON CELLULAR OF IMPERIAL, INC. OKLAHOMA CITY, OK DBN DDR BROADBAND NETWORKS, LLC. ATLANTA, GA DBR DIRECT/NET OF BATON ROUGE BATON ROUGE, LA DBS DOMINION BANKSHARES CORP ROANOKE, VA DBT DATABASE TECHNOLOGIES, INC. POMPANO BEACH, FL DBY DANBURY CELLULAR ROCHESTER, NY DCA ALBA DATA TECHNOLOGY INC (PREV DATAAMERICA CORP) VIENNA, VA DCB DAVIS CABLE INSTALLATIONS, INC. PHILADELPHIA, PA DCC DIALOGIC COMMUNICATIONS CORP FRANKLIN, TN DCD DEPARTMENT OF CORRECTIONS DORCHESTER COUNTY CAMBRIDGE, MD DCE DAKOTA CARRIER NETWORK FARGO, ND DCG USE IAC CODE ANK BOCA RATON, FL DCH DIRECT COMM, INC. FARMINGTON, NM DCI D C I MOBILE TELEPHONE AND PAGING DCK DARIEN COMMUNICATIONS, INC. DARIEN, GA DCL DIRECT LINE ANSWERING INC COLUMBUS, OH DCM DIRECT PAGE COMMUNICATIONS SANTA ANA, CA DCN TEL-OPTIC, INC DBA UNIVERSAL NETWORK SVC(PREV. DISCOUNT FORT SMITH, AR COMM SVC) DCO DEFENSE COMMERCIAL COMMUNICATIONS OFFICE SCOTT AIRFORCE BASE, IL DCP DATA COPI DCQ DCS, INC. SAN LEANDRO, CA DCR DON CLARK RADIO COMMUNICATIONS INC BLACKFOOT, ID DCS DATEL COMMUNICATIONS SYSTEMS INC DCT DIRECT COMMUNICATION INC BATON ROUGE, LA DCU DACO TELECOMMUNICATIONS, INC. OTTAWA, CN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–48 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DCV DAKOTA CARRIER SERVICES TUCSON, AZ DCW DATACHOICE NETWORK SERVICES, L.L.C. LITTLETON, CO DCX DIAL CALL COMMUNICATIONS, INC. NORCROSS, GA DCY DIRECTORYNET INC ATLANTA, GA DCZ DCI INC PHILADELPHIA, PA DDA DAVID D. ANDERSON COMMUNICATIONS CORP. PALM DESERT, CA DDC DIGITAL DIAL COMMUNICATIONS INC ARLINGTON, TX DDD D.D.D. CALLING, INC. HOUSTON, TX DDG THE DOBSON GROUP, INCORPORATED INDIANAPOLIS, IN DDI DIRECT DIAL INC DDL DIRECT/NET LTD OF DALLAS HOUSTON, TX DDN DIAL DISTANCE, INC. ATLANTA, GA DDO DIAMOND LONG DISTANCE OPERATOR AUSTIN, TX DDP DIDIER COMMUNICATION PAGING, INC. FORT SMITH, AR DDR POCKET COMMUNICATIONS, INC(PREV DCR COMMUNICATIONS,INC) WASHINGTON, DC DDS DIRECT DIALING SYSTEMS INC TYLER, TX DDT DIRECT LINE DIV OF TRANSCALL AUSTIN, TX DDU DIGITAL DATA SOLUTIONS, INC. DAYTON, OH DDW DEADWOOD CELLULAR TELEPHONE COMPANY, INC. WEST ATLANTC CITY, NJ DEA TMC COMMUNICATIONS OF DELAWARE, INC. BETHESDA, MD DEC DECIMAL DATALINK INC UNION, OH DED D-TEL INC ISLANDIA, NY DEE DRENTHE TELEPHONE COMPANY ZEELAND, MI DEG DIGITAL AGENT, INC. ATLANTA, GA DEI DIMENSION ELECTRONICS INC DEJ DICELLOM COMMUNICATIONS IRVINE, CA DEL DELSTAN INDUSTRIES INC DEM DEL MAR COMMUNICATIONS INC SARATOGA, CA DEN DENWA COMMUNICATIONS, INC. FAIRFAX, VA DEO DESKTOP MEDIA, INC. ALBERT LEA, MN DEP DENVER & EPHRATA TELEPHONE AND TELEGRAPH CO EPHRATA, PA DES DATA & ELECTRONIC SERVICES INC DESTIN, FL DET DELTACOM, INC. WEST POINT, GA DEU DELTEL COMMUNICATIONS, INC. DELCAMBRE, LA DEW CDS NETWORKS, INC MEDFORD, OR DEY D & E SYSTEMS, INC. EPHRATA, PA DFC DFW COMMUNICATION DFG DILAN FINANCIAL GROUP, INC. NORTH RIDGE, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–49 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DFM DFW/METROLINK INC DALLAS, TX DFT USE IAC CODE LYN FREDONIA, NY DFV DIVERSIFIED COMMUNICATION SERVICES, LLP DBA FIRST CHOICE MAXWELL, IN COMMUNIC DFW D/FW SIGNAL INC DGA DIRECT GUIDANCE, INC. FT. LAUDERDALE, FL DGB DIGITAL BROADBAND COMMUNICATIONS, INC. WINCHESTER, MA DGC DIGI-CELL INC BROOKSVILLE, FL DGD NETWORK ONE, INC. (PREV. FAXJET, INC.) JACKSONVILLE, FL DGE DATAPAGE, INC. MIDDLEBURY, VT DGG DIGI-PAGE OXFORD, KS DGI DIGINET COMMUNICATIONS INC ROCKVILLE, MD DGK DIGILINK LAWNDALE, CA DGL QWEST COMMUNICATIONS CORP (PREV DIGITAL SIGNAL INC) DENVER, CO DGM DIGICOM COMMUNICATIONS BINGHAMTON, NY DGN PACNET INC (FORMERLY DIGINET TELECOMMUNICATIONS) MERCER ISLAND, WA DGO DIGITAL DIAL COMMUNICATIONS, INC. ARLINGTON, TX DGP DIGITAL PAGING SYSTEMS OF PITTSBURGH INC DGQ ADVANCE GLOBAL COMMUNICATIONS IRVING, TX DGR DIGICOM INTERNATIONAL SALT LAKE CITY, UT DGS DEPT OF GENERAL SERVICES ST OF MARYLAND BALTIMORE, MD DGT DIGITAL TELECOM DENVER, CO DGU DIGITAL COMMUNICATION SERVICE, INC. RARITAN, NJ DGV DIGITCOM SERVICES LOS ANGELES, CA DGW DIGITAL CONNECTIONS, INC. MORGANTOWN, WV DGX INTERMEDIA COMMUNICATIONS, INC(PREV DIGEX, INCORPORATED) BELTSVILLE, MD DGY DIGATEL COMMUNICATION SYSTEMS, LLC MAPLEWOOD, NJ DHC USE IAC CODE ITA ATLANTA, GA DHE DELOACH’S HOME ENTERTAINMENT CENTERS, INC. GRAND PRAIRIE, TX DHH D H COMMUNICATIONS SAN ANTONIO, TX DHI DHC, INC. EVANSTON, IL DHL DHL COMMUNICATIONS CORP DHM DEPT OF HEALTH & MENTAL HYGIENE ST OF MARYLAND BALTIMORE, MD DHT DHT FUND INC PHOENIX, AZ DIA DIAL PAGE CHARLOTTE, NC DIC DICOMM CELLULAR INC LYNN, MA DID DENVER DIRECT DIAL, LLC BROOMFIELD, CO DIE DIAL TONE, INC. MONTGOMERY, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–50 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DIG DIGI COMM PALESTINE, TX DIH DIGITAL ISLAND, INC. HONOLULU, HI DII DIAL TONE, INC MONTGOMERY, AL DIK DIALTEK, LLC SEATTLE, WA DIL DIAL PAGE MYRTLE BEACH, SC DIM DIGICOM, INC. RICHMOND HTS, OH DIN DPI TELECONNECT, L.L.C. DALLAS, TX DIO DIGITAL TELECOMMUNICATIONS, INC WINONA, MN DIR DIRECT LINE OF OKLAHOMA OKLACTY, OK DIS DUPONT INFORMATION SYSTEMS WILMINGTON, DL DIT DIG-I-TEL SEATTLE, WA DIU DIRECT COMMUNICATIONS, LLC BIG LAKE, MN DIY DANIEL ISLAND MEDIA COMPANY HOUSTON, TX DIZ TDI COMMUNICATIONS, INC. NEW YORK, NY DJS DJS COMMUNICATIONS, INC. PITTSBURGH, PA DKA DAKOTA ELECTRONICS ABERDEEN, SD DKB D&K BUSINESS PAGERS WARNERS, NY DKC DAKOTA TELECOMMUNICATIONS GROUP, INC.(PREV DAKOTA IRENE, SD COOPERATIVE) DKI DAKOTA TELECOM, INC. IRENE, SD DKL DEKALB TELEPHONE COOPERATIVE, INC. ALEXANDRIA, TN DKM DAKOTA CENTRAL TELECOMMUNICATIONS COOPERATIVE CARRINGTON, ND DKN DAKON SIOUX FALLS, SD DKO DAKTEL COMMUNICATIONS, LLC CARRINGTON, ND DKP DRAKE PAGING BEATTYVILLE, KY DKR DARK AIR CORPORATION WOBURN, MA DKT DAKOTA CELLULAR INC ABERDEEN, SD DKY DECKER COMMUNICATIONS SYSTEMS OF NEW MEXICO, INC. TAOS, NM DLA USE IAC CODE TJP DLC D&L COMMUNICATIONS INC FORT WAYNE, IN DLD DISCOUNT LONG DISTANCE INC DLE DIAL LONG DISTANCE, INC. CAMARILLO, CA DLG DIAL A PAGE RUSSELLVILLE, AR DLH DELHI NET, INC. DELHI, NY DLI DIGITAL TELECOMMUNICATIONS INC EXTON, PA DLJ DSL INTERNET CORPORATION MIAMI, FL DLK DIRECT-LINK NEW BRAUNFELS, TX DLL TEL-ONE (PREV. DELTA TELECOMMUNICATIONS) STOCKTON, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–51 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DLM CONECTIV COMMUNICATIONS (PREV DELMARVA POWER & LIGHT CO) NEWARK, DE DLN DIGITAL NETWORK SERVICES INC ALBUQUERQUE, NM DLO DIAL-1 BEND, OR DLP DIAL-A-PAGE WATSEKA, IL DLQ DELTATHREE.COM NEW YORK, NY DLR DANVILLE REDI PAGE INC DANVILLE, IL DLS DOUGLAS PAGING CO DOUGLAS, GA DLT DELTACOM LONG DISTANCE (PREV. DELTA COMMUNICATIONS INC) ARAB, AL DLU DIAL -THRU INTERNATIONAL CORPORATION LOS ANGELES, CA DLV DELTA COMMUNICATIONS, L.L.C. HARRISBURG, IL DLW DELAWARE MOBILE TELE CO DLX DELUXE DATA SYSTEMS INC NEW BERLIN, WI DLY DONLEY COMMUNICATIONS LEBANON, PA DLZ DIGITAL COMMUNICATIONS DALLAS, TX DMA DATA GENERAL NETWORK SERVICES (PREV DAMA TELECOM CORP) ROCKVILLE, MD DMB DELTA MOBILE DMC DES MOINES CELLULAR PARTNERSHIP DES MONIES, IA DMD DIAMOND COMMUNICATIONS PLANO, TX DME DOME COMMUNICATIONS DMF DESERT MOBILFONE RIDGECREST, CA DMG DMG, INC DBA VOICE-TEL OF NORTH TEXAS GRAND PRAIRIE, TX DMI DMI COMMUNICATIONS GROUP, INC. FORT LEE, NJ DMJ DMJ COMMUNICATIONS, INC. ODESSA, TX DMK DIAL AMERICA MARKETING INC KANSAS CITY, MO DMM DATACOMM INTERNATIONAL CO. LTD. MIAMI, FL DMN DOMINICAN COMMUNICATION CORP NEW YORK, NY DMO ADAMS ELECTRICAL CO-OPERTIVE CAMP POINT, IL DMP DATACOM CORP BROOKLYN, NY DMR DANVILLE METRONET INC GREENSBORO, NC DMS DIDIER COMMUNICATION SERVICES, INC. FORT SMITH, AR DMT DELTA MOBILE TELEPHONE OF ARKANSAS INC DMU DEVON MOBILE COMMUNICATIONS, L.P. BUFFALO, NY DMV GULFPINES COMMUNICATIONS (PREV DIAMOND TELEPHONE BAY SPRINGS, MS SERVICES INC) DMY DEPARTMENT OF MARYLAND STATE POLICE QUARTERMASTER JESSUP, MD DIVISION DMZ ATD COMMUNICATIONS, LTD. NEW YORK, NY DNA DUNN & ASSOCIATES DBA BOULEVARD TELEPHONE OVERLAND PARK, KS DNC DOBSON CELLULAR SYSTEMS OKLAHOMA CITY, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 9–52 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DND DISCOUNT LONG DISTANCE KNOXVILLE, TN DNE DISCOUNT LONG DISTANCE, INC. SANTA ANA, CA DNG DUNN LONG DISTNCE DALLAS, TX DNH CONNECTECH, L.L.C. DBA TELX NEW YORK, NY DNI WORLDCOM INC.(PREV. LDDS/WORLDCOM) JACKSON, MS DNK DIAL NETWORK DNL DIRECT/NET OF LAFAYETTE LAFAYETTE, LA DNM TELSCAPE INTERNATIONAL, INC.(PREV. ORION COMMUNICATIONS, HOUSTON, TX INC.) DNN DNS INC DUNCANVILLE, TX DNO ZEPHION NETWORKS COMM. INC (PREV DOMINO NETWORKS FALLS CHURCH, VA COMMUN. INC) DNQ DIRECT NET TELECOMMUNICATIONS NEWPORT BEACH, CA DNR DANCRIS TELECOM, L.L.C. SCOTTSDALE, AZ DNS DIAL N SAVE CORP SACRAMENTO, CA DNT DIGI-NET INC MILWAUKEE, WI DNU DEPARTMENT OF THE NAVY CONSOLIDATED SUPPORT DETACHMENT DAHLGREN, VA DNV DIRECT NETWORK SERVICES, INC. HOUSTON, TX DNW DIRECT NETWORK CO HOUSTON, TX DNX DALLAS NEXTFONE SYSTEMS, L.C. DALLAS, TX DNY DIGITAL PAGING SYSTEM OF NEW YORK INC DOB LOGIX COMMUNICATIONS CORPORATION (PREV DOBSON WIRELESS, OKLAHOMA CITY, OK INC) DOC DELTA COMMUNICATION NEWARK, NJ DOE DIAMOND TELCO - YOUR HOME TELEPHONE STORE CORPUS CHRISTI, TX DOG DOMINION GROUP LTD ISLANDIA, NY DOI DIAMOND COMMUNICATIONS INTERNATIONAL, INC. DALLAS, TX DOK DIRECT LINE OF KANSAS KANSAS CITY, KS DOL DONTEL INTERNATIONAL L.L.C. WHEELING, IL DOM DIME COMMUNICATIONS, INC NEW YORK, NY DON DAMRON CORPORATION CHICAGO, IL DOO CEL-NET I COMMUNICATIONS, INC. FLUSHING, NY DOR DIRECTLINK OF OREGON, INC. CANBY, OR DOS DIRECT LINE OF SPRINGFIELD SPRINGFIELD, MO DOT DOTHAM CELLULAR TELEPHONE CO DOTHAM, AL DOU DOUTELCO LLC RIVERTON, UT DOV DOMINION TELECOM RICHMOND, VA DOY DOYLESTOWN COMMUNICATIONS, INC. DOYLESTOWN, OH DPA DIAL PAGE OF THE TRIANGLE RALEIGH, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–53 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DPB CONTROLLED POWER CORPORATION OF OHIO MASSILLON, OH DPC DIGITAL PAGING SYSTEMS OF CLEVELAND INC DPD DIALPAD.COM, INC SANTA CLARA, CA DPE DIAL PAGE FLORENCE, SC DPG DIGITAL PAGING SYSTEMS OF INDIANA INC DPH DIGIPH PCS, INC. MOBILE, AL DPI DOMINOS PIZZA INC ANN ARBOR, MI DPK DIGITAL PAGING SYSTEMS OF KY DPL DISTRIBUTION PLUS FREDERICK, MD DPM DIGITAL PIPELINE COMMUNICATIONS INC ALGONQUIN, IL DPN DOLPHIN TELECOMMUNICATION CORP HOUSTON, TX DPO DATA-TELECOM CORP WAPAKONETA, OH DPP DATA PROCESSING SCIENCES CORPORATION CINCINNATI, OH DPR THE PONDER GROUP, INC. SAN ANTONIO, TX DPS DIGITAL PAGING SYSTEM DPT DIGITAL PAGING SYSTEMS OF TOLEDO INC DPU DISCOUNT PLUS COLUMBUS, OH DPW DIGITAL PAGING SYSTEMS OF WISCONSIN DPX TDPC, INC. OXFORD, NC DPY DISCOUNT PAYPHONE CARRIERS INC FT LAUDERDALE, FL DRA DIRECT DATA INC. NEWPORT NEWS, VA DRB 9278 DISTRIBUTOR INC BRONX, NY DRC DELRAY CELLULAR ASSOCIATES 11 BETHESDA, MD DRD DIRECT LD, INC. GRAND PRAIRIE, TX DRE DIRECT COMMUNICATIONS, INC. (TX) KATY, TX DRG TELEDIRECT TELECOMMUNICATIONS GROUP LLC LOS ANGELES, CA DRI DIRECT-TEL, INC. BOCA RATON, FL DRL DIRECT LINE HASP INC DRM DE RIDDER MOBILEFONE DRN DIRECT/NET OF NEW ORLEANS NEW ORLEANS, LA DRO DICKEY RURAL COMMUNICATIONS, INC. ELLENDALE, ND DRP DAKOTA RADIO PAGING INC DRR DIRECT2INTERNET CORP. BOCA RATON, FL DRS DOYLE ROGERS CO LITTLE ROCK, AR DRT DIRECT LINE TELCO OK CITY, OK DRU DICKEY RURAL TEL COOP. ELLENDALE, ND DRX DIRECT COMMUNICATIONS JOPLIN, MO DSA DSH & ASSOCIATES ADDISON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–54 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DSB DIALOG SMALL BUSINESS ALLIANCE, INC. CHARLOTTE, NC DSC M2 COMMUNICATIONS DBA DIAL LONG DISTANCE BILLING SVCS. NORTH MIAMI BEACH, FL DSD DISCOUNT DIAL EDLNA, MN DSE DSLNET COMMUNICATIONS, LLC NORWALK, CT DSG DIGITAL SIGNAL COMMUNICATIONS, INC. DBA DSCI CORPORATION LEXINGTON, MA DSH EQUAL NET CORP (PREV U S COMM & FIRST CHOICE LONG DISTANCE) RICHARDSON, TX DSI @LINK NETWORKS, INC. (PREV DAKOTA SERVICES LIMITED) OLYMPIA, WA DSL DIAL SERVICES LTD BOCA RATAN, FL DSM DSL TELECOM, INC. MIAMI, FL DSN DEFENSE COMMUNICATIONS AGENCY WASHINGTON, DC DSO DBS COMMUNICATIONS, INC. SCHAUMBURG, IL DSP DIRECT/NET OF SHREVEPORT BOSSIER CITY, LA DSR TELAPEX LONG DISTANCE, INC.(PREV. DISTANCE DIRECT, INC.) JACKSON, MS DSS DATAVISION COMMUNICATIONS, INC. GERVAIS, OR DST DUNSNET WILTON, CT DSU DISCOUNT COMMUNICATIONS MEMPHIS, TN DSV DIGITAL NETWORK SERVICES INC LAS VEGAS, NV DSY DATA CELLULAR SYSTEMS WOODLAND HILLS, CA DTA DELAWARE TELEPHONE ANSWERING SERVICE INC DTB D-TEL LLC WILMINGTON, DE DTC NEW PAR DBA AIRTOUCH CELLULAR (PREV DETROIT CELLULAR TELE SOUTHFIELD, MI CO) DTE PLANET COMMUNICATIONS GROUP(PREV DESTINY TELECOMM PORTLAND, OR INTERNATIONAL) DTF DATAVON INC RICHARDSON, TX DTG DIGITAL TELECOMMUNICATIONS GROUP INC WEST MONROE, LA DTH DATATECH HANNIBAL, MS DTI DIGITAL TELEPORT INC ST LOUIS, MO DTK DTI COM, INC. LOS ANGELES, CA DTL DIRECT LINE AUSTIN INC AUSTIN, TX DTM DIRECTLINE TELAMERICA SPRINGFIELD, MO DTN DIRECT/NET INC OF USA NEW ORLEANS, LA DTO DITTRONICS BENTON, MO DTP DALLAS TELEPHONE AND PAGING, INC. HOUSTON, TX DTQ DELTATEL, INC. ATLANTA, GA DTR EASYLINK SERVICES USA, INC. (PREV DIGITRAN CORP) EDISON, NJ DTS DISCOUNT TRANSMISSION SYSTEMS INC DTT DATA COMMUNICATION SERVICE AZLE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–55 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DTU GST TELECOM HAWAII, INC(PREV DIGITAL TELECOMMUNICATIONS KAPOLEI, HI INC) DTV DEPARTMENT OF THE TREASURY INTERNAL REVENUE SERVICE WASHINGTON, DC DTW DIAL TWO INC SANTA ROSA, CA DTX DATATRONCX INC ROCHESTER, NY DTY DATA & TELEPHONY ALTERNATIVE INC DALLAS, TX DTZ DTI CORPORATION WINONA, MN DUB DUBOIS MOBILE TELEPHONE CO INC JOHNSTOWN, PA DUC DUCOR TELEPHONE CO DUCOR, CA DUE DUNNE COMMUNICATIONS ANACONDA, MT DUG DOUGLAS TELECOMMUNICATIONS, INC. SAN RAFAEL, CA DUI DATA UTILITIES INC DUK DUKENET COMMUNICATIONS, INC. CHARLOTTE, NC DUL DULUTH PCS, INC. WINTER PARK, FL DUN DUN & BRADSTREET INFORMATION SERVICES PARSIPPANY, NJ DUO DUMONT TELEPHONE COMPANY DUMONT, IA DUP DUO COUNTY TELEPHONE COOPERATIVE CORPORTION, INC. JAMESTOWN, KY DUR DURO COMMUNICATIONS INC KENNESAW, GA DUS LONG DISTANCE AMERICA FT LAUDERDALE, FL DUT DUTCHESS COUNTY CELLULAR WAPPINGER FALLS, NY DUU DUQUESNE UNIVERSITY PITTSBURGH, PA DUV DOUGLAS SERVICES, INC. ROSEBURG, OR DVA DEL-VAL AREA CALL DVC ADVANCED COMMUNICATIONS GROUP ST LOUIS, MS DVD COPPER VALLEY LONG DISTANCE, INC. VALDEZ, AK DVE D.V.C. ENTERPRISES, INC. DBA DVC TELECOM TEXARKANA, TX DVF HANCOCK COMMUNICATIONS, INC (PREV DIVERSIFIED MAXWELL, IN COMMUNICATIONS INC) DVG ADVANTAGE CELLULAR SYSTEMS, INC. ALEXANDRIA, TN DVH ADVANCED COMMUNICATIONS TECHNOLOGY, INC. FORSYTH, MT DVI DV2 INC MARIETTA, GA DVK DVORAK KENNEDALE, TX DVL DELTA VALLEY RADIO TELEPHONE DVM DAVIESS-MARTIN RTC TELECOMMUNICATIONS COMPANY MONTGOMERY, IN DVN ADVANCED TELECOM GROUP,INC LOS ALTOS, CA DVO DIVERSIFIED COMMUNICATION SOLUTIONS CANTON, OH DVR DOVER RADIO PAGE INC DVS DAVIS LONG DISTANCE DALLAS, TX DVT AMERICATEL (PREV DISCOVERY TELECOMMUNICATIONS INC) MIAMI, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–56 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location DVU DIVERSE COMMUNICATIONS INC WOODHULL, IL DVW ADVANCED NETWORK COMMUNICATIONS, L.L.C. SCHALLER, IA DWC DIGITAL WORLD COMMUNICATIONS INCORPORATED ALBANY, NY DWI D2 WIRELESS, INC FLUSHING, NY DWK DIGITAL NETWORK INTEGRATORS INC FENTON, MO DWS DISCOUNT NETWORK SERVICES INC. DEARBORN HTS, MI DXC DIXIE COMMUNICATIONS ST. GEORGE, UT DXN DIXIENET COMMUNICATIONS, LLC RIPLEY, MS DXO DIGITAL EXPRESS COMMUNICATIONS CORP MONUMENT, CO DYA DIRECTORY AMERICA, INCORPORATED LYNDHURST, OH DYC DYNEGY CLEC COMMUNICATIONS, INC. AURORA, CO DYD DYNATEL LONG DISTANCE SERVICES, INC. LAS VEGAS, NV DYG DYNEGY CONNECT, L.P. AURORA, CO DYI DYNALINK TELECOMS, INC. OAKLAND, CA DYL DYNATEL INC. JACKSONVILLE, FL DYM DYNAMIC TELECOM INTERNATIONAL INC. FORT LAUDERDALE, FL DYN DYNA CORP DYS DYNAMIC TELCO SERVICES, INC. WASHINGTON, DC DYT DAYTON CELLULAR TELEPHONE DAYTON, OH DYV PIONEER TELECOM(PREV. DWR LONG DISTANCE A DIV OF LANCASTER, WI DICKEYVILLE TEL) DZP DIAL PAGE TAMPA, FL EAA SERVAYA, INC. ASTORIA, NY EAC ECON-A-CALL CO (AUSTIN) AUSTIN, TX EAE EAGLE COMMUNICATIONS, INC. NYC, NY EAG EAGLENET INC HOLLAND, MI EAK EQUAL ACCESS NETWORKS, LLC WOBURN, MA EAL CENTRAL ARKANSAS TELEPHONE COOPERATIVE, INC. BISMARCK, AR EAM EAS COMMUNICATION INC WEST COVINA, CA EAN ASEAN TELECOM, LLC UNION CITY, CA EAP EMERSON TRIPOLI DBA ALTA NETWORKS LINDSAY, CA EAR EAST ARKANSAS CELLULAR TELEPHONE CORP WAUKESHA, WI EAS BROADWING TELECOMMUNICATIONS INC (PREV ECLIPSE TELECOM AUSTIN, TX INC) EAT AMERICAN LOCAL TELECOMMUNICATIONS, LLC DBA ALT DALLAS, TX COMMUNICATIONS LLC EAU STELLAR COMMUNICATIONS, INC. VERNON, TX EAW EQUAL ACCESS OF WASHINGTON, INC. WASHINGTON, DC EAX CENTRAL TEXAS TECHNOLOGIES, L.P. AUSTIN, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–57 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EAY EASY CALL, INC. CHICAGO, IL EBA CELLCO PARTNERSHIP DBA VERIZON WIRELESS PREV DBA B ATL MOBILE BEDMINSTER, NJ EBC TELEBEC LTEE QUEBEC, PQ EBE CELEBRATE COMMUNICATIONS, L.L.C. GENESEO, IL EBI EBILLIT, INC. SAN JOSE, CA EBL REBOOT INC DBA EAGLE BELL (CA) ANAHEIM, CA EBM TELEBEAM TELEPHONE SYSTEMS, INC. LIC, NY EBN EVEREST BROADBAND NETWORKS, INC. FORT LEE, NJ EBR USE IAC CODE ECI BRANSON, MO ECA ECON-A-CALL INC OF HAYS HAYS, KS ECB ECONO-CALL INC (BILOXI) ECC EXECOMM INC QUINCY, IL ECD ECONODIAL LEESBURG, FL ECE ETEX LONG DISTANCE DBA ETEX CELLULAR CO., INC GILMER, TX ECH A-TECH TELECOM, INC. PLANO, TX ECI ECI COMMUNICATIONS, INC. (PREV. ECONO-CALL INC.) EUGENE, OR ECJ ETC/CRLP JOINT VENTURE HOUSTON, TX ECK EASTERN COLORADO INDEPENDENT NETWORKS, LLC. BYERS, CO ECL ECONO-LINE TRAVERSE CTY, MI ECM EMERALD COMMUNICATION COMPANY ECN ECONO DIAL OF LEESBURG LEESBURG, FL ECO COMPUTER SCIENCES INC EL SEGUNDO, CA ECP EXECUPAGE FRESNO, CA ECQ ECOCOM TELECOMMUNICATIONS VIENNA, VA ECR ECONO CALL LONG DISTANCE SERVICES LAS CRUCES, NM ECS EQUATORIAL COMMUNICATIONS SERVICES ECT EAU CLAIRE CELLULAR TELEPHONE LIMITED PARTNERSHIP ALTOONA, WI ECU EXECUTIVE TELECARD LTD ROCKVILLE, MD ECV TELSEON CARRIER SERVICES, INC. ENGLEWOOD, CO ECW EQUALNET CORPORATION (PREV ECONOLINE OF WACO) WACO, TX ECX EASY COMM BEEPERS LAS VEGAS, NV ECY ECONOMY TELEPHONE CO SAN DIEGO, CA ECZ EASY CELLULAR, INC. LAS VEGAS, NV EDC ACTION PAGE INC GREELEY, CO EDE EIDE ELECTRONICS EDG EDGAR ELECTRIC CO-OPERATIVE ASSOCIATION PARIS, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–58 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EDL ECON-O-DIAL RIDGECREST, CA EDN EDGE2NET KIKRLAND, WA EDO EL DORADO CELLULAR DBA MOUNTAIN CELLULAR OAKHURST, CA EDR EL DORADO COMMUNICATIONS CO PINE GROVE, CA EDS EDS (ELECTRONIC DATA SYSTEMS CORP) WARREN, MI EDT EDGE CONNECTIONS, INC. ATLANTA, GA EEC BUSINESS SERVICES BY CELLULAR ONE (PREV ECLIPSE COMM. CORP) BELLEVUE, WA EEE ETS TELEPHONE COMPANY, INC. HOUSTON, TX EEG ELECTRONIC ENGINEERING EEH ELITE TELEPHONE COMPANY, INC. COLORADO SPRINGS, CO EEI AEEP, INC. RICHARD, KY EEK TELEPAK, INC. JACKSON, MS EEL ZEPTEL DALLAS, TX EEM ENERGY EAST TELECOMMUNICATIONS, INC. BINGHAMTON, NY EEN EAST ASCENSION TELE CO INC GONZALES, LA EEO ACCESS ONE, INC. CHICAGO, IL EEP THE BEEPER DEPOT RIALTO, CA EES CELECT COMMUNICATIONS, LLC. SPRING VALLEY, WI EET CELLUPHONE OF TEXAS DALLAS, TX EEU CENTRAL CELLULAR, INC. DAVENPORT, OK EEX GENESIS TELECOMMUNICATIONS, LLC GREENWOOD, SC EEY TECH VALLEY COMMUNICATIONS INC ALBANY, NY EFF EFS, INC. DBA FIRST CHOICE COMMUNICATIONS HOPE HULL, AL EFG EFFICY GROUP, INC GREENVILLE, SC EFH E F HUTTON NEW YORK, NY EFR EXECULINE OF FAIRFIELD FAIRFIELD, CA EFW CENTENNIAL FLORIDA SWITCH CORP. NEPTUNE, NJ EFX EL FENIX TELEPHONE CORP CLIFFSIDE PARK, NJ EFY TELEFYNE INCORPORATED PACE, FL EGA EAGLE COMMUNICATIONS OF CA LLC NEW YORK, NY EGC E G COMMUNICATIONS EGE TELEGATE, INC. ARLINGTON, VA EGI WORLDCOM INC (PREV ENVOY GLOBAL INC) PORTLAND, OR EGL EAGLE COMMUNICATIONS EGM EAGLE COMMUNICATIONS INC.(1994) AVON, CO EGN CITY OF ELGIN ELGIN, IL EGP EAGLECOM (DBA PTSI LONG DISTANCE) GUYMON, OK EGR TEGRA, INC. LINCOLN, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–59 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EGT EASTGATE COMMUNICATIONS INC. TEANECK, NJ EGV TELEPHONE GUEVREMONT INC. STE- ROSALIE, CN EGX EGIX NETWORK SERVICES, INC INDIANAPOLIS, IN EGY EGYPTIAN COMMUNICATION SERVICES, INC. STEELEVILLE, IL EHC ENHANCED TELEMANAGEMENT INC MINNEAPOLIS, MN EHG HAINKE, GARY W DBA ENTERPRISE COMMUNICATIONS CO WICHITA, KS EHL EARTHCALL COMMUNICATIONS CORPORATION ATLANTA, GA EHM TELEPHONE MILOT INC. ST PAULIN, CN EHO ECHO COMMUNICATIONS, INC PITTSTON, PA EHW ENHANCED COMMUNICATIONS NETWORK, LLC INDIANAPOLIS, IN EIA ACTEL, INC. CEDAR KNOLLS, NJ EIC EMPIRE COMMUNICATIONS INC CHARLOTTE, NC EID TELUS INTEGRATED COMMUNICATIONS EDMONTON, AB EIE ELITE COMMUNICATIONS INC. TORONTO, CN EIG ACTEL INTEGRATED COMMUNICATIONS, INC. MOBILE, AL EIK EXCELINK COMMUNICATIONS INC CLEARWATER, FL EIL AMERICA’S DIGITAL SATELITE TELEPHONE LAS VEGAS, NV EIM TELCO GROUP, INC (PREV TELCO INVESTMENT GROUP INC) FLUSHING, NY EIN TELIC COMMUNICATIONS DBA TELIC.NET NEW YORK, NY EIO ELINK COMMUNICATIONS, INC. BETHESDA, MD EIP CENTRAL WIRELESS PARTNERSHIP GLENDALE, CA EIR LECSTAR TELECOM, INC (PREV EMPIRE TELECOM SERVICES, INC) ATLANTA, GA EIS EXECUTONE INFORMATION SYSTEMS INC DARIEN, CT EIT ELITEL, INC. LAREDO, TX EIV EASTERN ILLINI SERVICES CORPORATION PAXTON, IL EJM E & J MOBILE RADIO SERVICE EJT TELJET, INC. ST. JOHNSBURY, VT EKC ACC OF KENTUCKY LLC (PREV CENTRAL KENTUCKY CELLULAR RICHMOND, KY CORPORATION) EKD ERICKSON DIVERSIFIED CORPORATION HUDSON, WI EKG ZONE TELECOM, INC. CAMBRIDGE, MA EKN EASTMAN KODAK COMPANY ROCHESTER, NY EKO ENKIDO, INC. HACKENSACK, NJ EKR TENKAL COMPANY T/A SCATTER CREEK COMMUNICATIONS TENINO, WA EKS E AND K SYSTEMS SECAUCUS, NJ EKW TEXAS NETWORK COMMUNICATIONS, INC. HOUSTON, TX ELA ELLERBE TELEPHONE COMPANY ELLERBE, NC ELB EAGLE COMMUNICATIONS INC (PRE. 1988)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–60 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ELC ELECTRO-CRAFT ELD ECONOMIC LONG DISTANCE COMMUNICATIONS INC ELE WORLDCOM INC. (PREV. LDDS) TULSA, OK ELF TELECOM FUNDING, INC. LAS VEGAS, NV ELG ELECTRIC LIGHTWAVE INC VANCOUVER, WA ELH TELECOM TECHNICIANS, INC. MADISON HEIGHTS, MI ELI EXECULINES INC YAKIMA, WA ELJ TELESPRECTUM COMMUNICATIONS, INC. FARGO, ND ELK EL PASO NETWORKS, LLC. HOUSTON, TX ELL ELCOTEL SARASOTA, FL ELM ECONO-LINE MIDLAND AUSTIN, TX ELN 800 LINE COMMUNICATIONS ELO ECONOCOM LONG DISTANCE LUBBOCK, TX ELP ELECTROPAGE INC ELQ C.B. TELECOMM, INC. PINELLAS, FL ELR TELICOR INC. SEATTLE, WA ELS WESTSTAR WIRELESS COMMUNICATIONS, INC (PREV ELECTRONIC SAN LUIS OBISPO, CA LEASING) ELT ELECTRA COMMUNICATIONS CORP AUSTIN, TX ELU CENTEL COMMUNICATIONS,INC GOLDENDALE, WA ELV EXECULINE OF LAS VEGAS SAN MATEO, CA ELW AMERICAN LIGHTWAVE COMMUNICATIONS, INC. HOUSTON, TX ELX 1STEL, INC. CLEBURNE, TX ELY TELCOM SUPPLY, INC. LIVINGSTON, TX ELZ Z-TEL COMMUNICATIONS, INC TAMPA, FL EMA CENCOM, INC. JACKSON, NE EMC EURONET COMMUNICATIONS, CORP MORGANVILLE, NJ EME ENTERTAINMENT CONNECTIONS, INC. EAST LANSING, MI EMH AMERICAN TELECOMMUNICATIONS & TECHNOLOGY, INC. DBA FT. LAUDERDALE, FL AMTEL TECH EMI INTERMEDIA COMMUNICATIONS INC (PREV EASTERN MICROWAVE SYRACUSE, NY INC) EMK EXECUTIVE MARKETING SERVICES INC NAPERVILLE, IL EML EMERSON TELECOM DALLAS, TX EMM EMCOMM CORP PORTLAND, OR EMN CENTURYTEL MICHIGAN NETWORK, L.L.C. MONROE, LA EMO SIGHT & SOUND/CELLULAR & MORE LAURENS, SC EMP EMPIRE COMMUNICATIONS SERVICES CORPORATION PRATTSBURGH, NY EMR ENMR TELEPHONE COOPERATIVE CLOVIS, NM

Proprietary — Licensed Material See proprietary restrictions on title page. 9–61 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EMS EMPIRE MOBILECOMM SYSTEMS INC EMT ECONO CALL INC OF MONTANA KALISPELL, MT EMU EMERGENT COMMUNICATIONS, LLC. MINNEAPOLIS, MN EMV ARIZONA CELLULAR COMMUNICATION DBA CELLULAR ONE MOHAVE KINGMAN, AZ EMW CENTURYTEL OF THE MIDWEST-WISCONSIN, INC. LA CROSSE, WI EMX EMX TELCOM ROCKVILLE, MD EMY TELEPAGE COMMUNICATIONS SYSTEMS INC VIENNA, WV ENA EN-TEL COMMUNICATIONS, LLC. ANNANDALE, MN ENC ERNEST COMMUNICATIONS, INC NORCROSS, GA END ENID CELLULAR ENID, OK ENE ECONOLINE ENG ELLINGTON TELEPHONE COMPANY ELLINGTON, MO ENH EXECUTONE/NEW HAMPSHIRE INC ENI ENID DATA SYSTEMS INC ENK ZENK GROUP, LTD. DBA PLANET ACCESS FENTON, MI ENL ESSENTIAL.COM, INC BURLINGTON, MA ENM CENDANT MEMBERSHIP SERVICES, INC. STAMFORD, CT ENN CENTURY ENTERPRISES, INC. CANTON, IL ENO ECON-O-CALL OF TEHACHATE TEHACHATE, CA ENP TENNESSEE RSA NO 3 LIMITED PARTNERSHIP KNOXVILLE, TN ENR ENRON BROADBAND SERVICES, INC (PREV ENRON COMM., INC) PORTLAND, OR ENS ENGINEERING SYSTEMS INC ENT ERNEST TELECOM INC NORCROSS, GA ENU EN-TOUCH SYSTEMS, INC HOUSTON, TX ENV ENVISAGE DBA US OPERATORS SAN ANTONIO, TX ENW FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, INC ROCHESTER, NY ENX TELENETWORK, INC. SAN MARCOS, TX ENY CENTURYTEL SOLUTIONS, LLC. MONROE, LA EOA ETCOM, LLC ELLERBE, NC EOC AMERISYSTEMS PARTNERSHIP (MERG EOCA & EO TECH) DALLAS, TX EOD ECON-O-DIAL OF BISHOP BISHOP, CA EOG EASTERN OREGON TELECOM LLC HERMISTON, OR EOI CCI COMET COM INC SAN DIEGO, CA EOK CENTRAL OKLAHOMA TELEPHONE CO. DAVENPORT, OK EOL EBONTEL COMMUNICATIONS CORPORATION MILWAUKEE, WI EOM EAST COAST COMMUNICATIONS, INC. RICHMOND, VA EON CONNECT, LLC BIRMINGHAM, AL EOO KEXA CORP DBA CAPITAL EXPLORATION DELRAY BEACH, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–62 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EOP CELLULAR ONE OF PHILADELPHIA WAYNE, PA EOR ENCORE COMMUNICATIONS, LLC EAGAN, MN EOS EASY ORDER SOFTWARE INC SYRACUSE, NY EOT EMPIRE ONE TELECOMMUNICATIONS, INC. NEW YORK, NY EOU TELCO 214, INC. MELBOURNE, FL EOW TELCO NETWORK, L.L.C. BELLEVUE, WA EOZ TEL-OPS LLC TAMPA, FL EPA EXPRESS TELECOMMUNICATION, INC FORT WORTH, TX EPB ELECTRIC POWER BOARD OF CHATTANOOGA CHATTANOOGA, TN EPC EVANS PRODUCTS CO EPE EPHONE TELECOM INC HERNDON, VA EPG EMPIRE PAGING CORP EPH VIATEL SERVICES, INC. (PREV DESTIA COMMUNICATIONS SERVICES, CHESTERFIELD, MO INC) EPI EL PASO PAGING, INC. EL PASO, TX EPK EPIK COMMUNICATIONS INC ORLANDO, FL EPL ELW PAGING, LLC OZARK, MO EPM EXECUTIVE PAGING & MESSAGE PROCESSING SERVICE INC CAMDENTON, MO EPN TELEPAK NETWORKS, INC JACKSON, MS EPO ACCESS POINT, INC. CARY, NC EPP ENTERPRISE COMMUNICATIONS PARTNERSHIP COLUMBUS, GA EPQ TELE-PRO COMMUNICATIONS CORPORATION SPRINGFIELD, NJ EPR EMPIRE-RADIOFONE EPS EXECUTIVE PRIORITY SYSTEMS SAN FRANCISCO, CA EPT ELEPHANT TALK, INC. BOSTON, MA EPU SEMPRA COMMUNICATIONS SAN DIEGO, CA EPV EASTERN COMPUTER SERVICES INC BELLEVILLE, NJ EPW ESP WIRELESS ANAHEIM, CA EPX EPIX INTERNET SERVICES, INC. DALLAS, PA EQB EQUIBANK INC PITTSBURGH, PA EQC TELECOM QUEBEC INC. BON CONSEIL, CN EQG EQUITABLE GAS CO PITTSBURGH, PA EQL EQUALINE SERVICES, INC. HOUSTON, TX EQM EQUICOM COMMUNICATIONS INC DUBLIN, OH EQN CIERA NETWORK SYSTEMS, INC (PREV EQUALNET CORPORATION) HOUSTON, TX EQP EQUALITY PLUS TELECOMMUNICATIONS WALLINGFORD, CT EQQ TELQUEST TECHNOLOGIES, LLC DBA QUALTEL COMMUNICATIONS PHOENIX, AZ EQU EQUANT U.S., INC ATLANTA, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–63 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EQY EQUITY VENTURES INC COLORADO SPRINGS, CO ERA AMERICA ONLINE INC DULLES, VA ERC ERIE CELLULAR TELEPHONE COMPANY CANFIELD, OH ERE STERLING TELECOM, INC. HUNTINGTON STATION, NY ERG ERLANG, INC. WASHINGTON, DC ERH AMERICAN TELECHARGE, INC. MULLICA HILL, NJ ERI ERIETEL, INC. PA, PA ERK ERICSSON INC LYNCHBURG, VA ERL EALS DISTRIBUTING CO IDAHO FALLS, ID ERM EXARIO TELECOM INC PARSIPPANY, NJ ERN EASTERN TELECOMMUNICATIONS, INC. NEW YORK, NY ERO CEDAR COMMUNICATIONS, LLC CLARENCE, IA ERP AMERICAN PHONE SERVICES ALPHARETTA, GA ERS EASTERN RADIO SERVICE MATTHEWS, NC ERT ENTRE TELECOMMUNICATIONS CORP CEDER RAPIDS, IA ERU EXPRIMER COMMUNICATIONS, INC. BROOKLYN, NY ERV ATS SERVICES, LLC. PROSPECT HEIGHTS, IL ESA ELECTRONIC SERVICE ASSOC ESB ENHANCED SERVICES BILLING INC SAN ANTONIO, TX ESC EASLEY COMMUNICATIONS OF ARKANSAS, INC. FORT SMITH, AR ESD ESCONDIDO TELEPHONE CO ESCONDIDO, CA ESE CENTRAL COMMUNICATIONS NETWORK, L.C. KANAWHA, IA ESF EXECULINE OF SAN FRANCISCO SAN FRANCISCO, CA ESG ACCESS DIALING INC. VIRGINIA BEACH, VA ESI EASTON TELECOM SERVICES, INC. RICHFIELD, OH ESL EDISON SELECT CITY OF INDUSTRY, CA ESM FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, INC. ROCHESTER, NY ESN EXECUTONE OF SAN ANTONIO ESO EASTLAND OF ORLANDO TELEPHONE CORPORATION ORLANDO, FL ESP ENHANCED SERVICES PROVIDER INC. CHATHAM, ON ESQ CESCOM MONTREAL, QC ESR E-SCRIPT ALAMO, CA ESS PACIFIC BELL INTERACTIVE MEDIA(PREV ESS VENTURES, INC) PASADENA, CA EST EASTERBOOKE CELLULAR CORP FAIRFIELD, CA ESU ESSEX COMMUNICATIONS STERLING, IL ESV TELE-SAVERS, INC LAWRENCE, KS ESW EXCEL SWITCH FACILITY, INC. DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–64 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ESX ESSEX COMMUNICATIONS PARTNERS RICHMOND, VA ESY INTERCONTINENTAL TELECOM, INC.(PREV READYCALL, INC) ARLINGTON, TX ESZ ESEMDE INC BOCA RATON, FL ETA ETEX COMMUNICATIONS, INC. DBA ETEX TELECOM GILMER, TX ETB NTCH-ET, INC. HERMOSA BEACH, CA ETC ELECTRONIC SPECIALTIES ETD AEA PLUS TELECOMS, INC. SAN MATEO, CA ETE EMPIRE TECHNOLOGY CORPORATION ATLANTA, GA ETG EASTERN TELECOM DBA INTERQUEST WEST POINT, GA ETH T.H. INC. MIDVALE, UT ETI EXPRESS TELCOM INC ETK E.T. KING TELECOMMUNICATIONS, INC. GREENSBORO, NC ETL TCG DELAWARE VALLEY, INC (PREV EASTERN TELELOGIC CORP) KING OF PRUSSIA, PA ETM PLATEAU TELECOMMUNICATIONS (PREV EASTERN TELECOMM. CLOVIS, NM SERVICES CO) ETN EATELNET INC GONZALES, LA ETO ETC COMMUNICATIONS, L.L.C. ELLIJAY, GA ETP ELLIS THOMPSON INC ATLANTIC CITY, NJ ETQ E-TEL , LLC. (PREV E-TEL/MURRAY, LLC) PADUCAH, KY ETR EASTERN TRANS COMMUNICATIONS DETROIT, MI ETS EASTERN TELEPHONE SYSTEMS ETT EDMOND TELEPHONE COMPANY EDMOND, OK ETU ENHANCED TELECOMMUNICATIONS SOLUTIONS INC EATONTOWN, NJ ETV EASTERN CABLE TELEVISION SERVICES INC LONG ISLAND CITY, NY ETX EASTEX CELLULAR HUNTSVILLE, TX ETY E.COM TECHNOLOGIES, LLC. CARMEL, IN ETZ EAGLE TELEPHONE SYSTEM INC RICHLAND, OR EUA NETWORK CONNECTIONS USA, INC. CLEVELAND, OH EUC CENTRAL UTAH COMMUNICATIONS, L.C., DBA WRLD ALLIANCE FAIRVIEW, UT EUE TERRY TRUELOVE, DBA METROTEL TELEPHONE COMPANY TULSA, OK EUF ECUFIN, INC VIRGINIA BEACH, VA EUH CENTRAL UTAH TELEPHONE KERRVILLE, TX EUL EDCO USA LLC NORWALK, CT EUN WILSON, ROBERT L. JR. DBA EXPRESS TELECOMMUNICATIONS ARLINGTON, TX EUO CELLULAR XL ASSOCIATES, L.P. DBA CELLULAR ONE HATTIESBURG, MS EUP ELLIS CELULAR & PAGERS KILLEEN, TX EUS ECON-O-CALL, INC DBA UNCLE SAM’S TELCOM, INC. NEW YORK, NY EUT EUCLID TELECOMMUNICATIONS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–65 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EUV TSI TELECOMMUNICATION SERVICES INC. TAMPA, FL EVA A-TECH TELECOM OF VIRGINIA, INC. PLANO, TX EVC CENTRAL VERMONT COMMUNICATIONS RUTLAND, VT EVG CENTURYTEL SERVICE GROUP, LLC MONROE, LA EVH EVERYTHING TELEPHONE, INC. FT. LAUDERDALE, FL EVI EXCELL AGENT SERVICES, L.L.C. TEMPE, AZ EVM EVOICE TELECOM, INC (PREV EVTI INC.) MENLO PARK, CA EVN EVANS COMMUNICATIONS EVO EVOLUTION NETWORKS, INC. ATLANTA, GA EVR EVERCOM SYSTEMS INC IRVING, TX EVS EVANS TELEPHONE CO TURLOCK, CA EVT EVEREST CONNECTIONS CORPORATION O’FALLON, MO EVU EVULKAN, INC. NEW YORK, NY EVY ENVOY CORP NASHVILLE, TN EWB THE ELECTRIC AND WATER PLANT BOARD OF THE CITY OF FRANKFORT, KY FRANKFORT EWC ACC OF WEST VIRGINIA CORP (PREV EASTERN WIRLESS CELLULAR) NEW YORK, NY EWG 21ST CENTURY WIRELESS GROUP INC WEST MEMPHIS, AR EWI ELLTEL WIRELESS, INC. ELLENSBURG, WA EWL ECONOLINE WHOLESALE LONG DISTANCE COMMUNICATIONS NEW YORK, NY EWP EAGLE WATCH AND PATROL SERVICE INC ELMHURST, IL EWT BTI TELECOMMUNICATIONS SERVICES (PREV. ECONOWATS) RALEIGH, NC EXA EXECULINE OF ALASKA KENNEWICK, WA EXB EXECULINE INC BILLINGS, MO EXC EXCELLER CORP EXD EXCO LONG DISTANCE DALLAS, TX EXE CTC EXCHANGE SERVICES, INC CONCORD, NC EXF INTERMEDIA COMMUNICATIONS INC. (PREV. PHONE ONE) TAMPA, FL EXG EXECUTIVE SERVICES PAGING COMPANY VIRGINIA BEACH, VA EXI EXPRESSCALL, INC. PHOENIX, AZ EXJ EXATEL INC. SUDBURY, CN EXL EXCEL TELECOMMUNICATIONS INC RICHARDSON, TX EXM EXTELCOM SALT LAKE CT, UT EXN EXTANT AURORA, CO EXO EXOP OF MISSOURI INC KEARNEY, MO EXP EXPRESS COMMUNICATIONS INC SIOUX FALLS, SD EXR EXECULINE OF RENO SPARKS, NV EXS EXPRESS MESSAGE CORP SPRING, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–66 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location EXT EXECUTIVE COMMUNICATIONS INC TULSA, OK EXU ESSEX COMMUNICATIONS, INC. MERRICK, NY EXV EXPRESS SERVICE COMPANY DALLAS, TX EXW TEXAS RSA 7B3, INC DBA PEOPLES WIRELESS SERVICES QUITMAN, TX CORPORATION EXY EXELON COMMUNICATIONS COMPANY, L.L.C. BALA CYNWYD, PA EYA ADELPHIA BUS SOLUTIONS OF AR, LLC (PREV ENTERGY HYPERION PITTSBURGH, PA ARKANSAS EYC ELECTRONIC SYSTEMS CO., INC. ALLENTOWN, PA EYL ADELPHIA BUS SOLUTIONS OF LA, INC(PREV ENTERGY HYPERION PITTSBURGH, PA LOUISIANA EYM ENTERGY HYPERION TELECOMMUNICATIONS OF MISSISSIPPI, L.L.C. PITTSBURGH, PA EYS AES CYGNUS, L.L.C. ARLINGTON, VA EZA E-Z ACCESS USA, INC. AUGUSTA, GA EZB ELIZABETH TELEPHONE COMPANY, INC. SULPHUR, LA EZC E-Z CALL COMMUNICATIONS INC. COUNCIL GROVE, KS EZE E-Z CONNECT, INC. ATLANTA, GA EZL EZ-TEL COMMUNICATIONS JACSONVILLE, FL EZO E-Z PHONE CONNECTIONS (E-Z PHONE) PAPILLION, NE EZP EZ PHONE, INC. AKRON, OH EZR ZEPHYR TELECOMMUNICATIONS INC FLORHAM PARK, NJ EZT EZ-TALK COMMUNICATIONS, L.L.C. STAFFORD, TX EZW EZTEL NETWORK SERVICES, LLC. BROOKNEAL, VA EZZ EZIAZ INC. CHICAGO, IL FAA FEDERAL AVIATION ADMINISTRATION C/0 MCI RICHARDSON, TX FAB FRONTIER COMMUNICATIONS OF ALABAMA, INC. MONROEVILLE, AL FAC FONE AMERICA INC SEATTLE, WA FAD FAST DATA OMAHA, NE FAI FIBER AMERICA, INC. SAN MARCOS, TX FAL FLATEL, INC. LAKE WORTH, FL FAM FIRST AMERICAN TELECOMMUNICATIONS DALLAS, TX FAN FANTASTIC PHONE SYSTEMS INC FAO FARMERS TELEPHONE COOPERATIVE, INC. (SC) KINGSTREE, SC FAP FARMERS TELEPHONE COOPERATIVE INC. RAINSVILLE, AL FAR FTC COMMUNICATIONS, INC (PREV FARMERS LONG DISTANCE) SUMTER, SC FAS FIBEROPTIC ALTERNATIVE SYSTEM TECHNOLOGIES INC ST LOUIS, MO FAT USE IAC CODE FAL MIAMI, FL FAX 555-FAX-INFORMATION TELCO PORTLAND, OR FBA COMMONWEALTH COMMUNICATIONS, INC (PREV. FBA AMERICA INC) EMMAUS, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–67 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FBC FIBRCOM SAN ANTONIO, TX FBE FREE BEEPER, INC WEST VALLEY CITY, UT FBF FIBERFONE OF FLORIDA INC MIAMI, FL FBI FIBERNET TELECOMMUNICATIONS INC. PHOENIX, AZ FBL XO COMMUNICATIONS, INC (PREV NEXTLINK) BALA CYNWYD, PA FBM FIBERCOM L.C. SIOUX CITY, IA FBN FIBERNET TELECOM, INC. NEW YORK, NY FBO FIBER TECHNOLOGIES, LLC ROCHESTER, NY FBP FORT BEND TELEPHONE COMPANY ROSENBERG, TX FBR FIBREBOND CORP SHREVEPORT, LA FBS FIBER SOUTH RALEIGH, NC FBT FIBERNET TELEMANAGEMENT INC SANTA MONICA, CA FBU PROFESSIONAL FUSION ENTERPRISES, INC(PREV FLEABUSTERS) FOUNTAIN VALLEY, CA FBW PATHWAY COM-TEL, INC. (PREV FIBER WAVE TELECOM, INC.) JOSHUA, TX FBX FBF INC. NEWARK, NJ FCA FIVECOM ASSOCIATES (NOW BROOKS FIBER PROPERTIES, INC-BFP) WALTHAM, MA FCC FIBERNET COMMUNICATIONS INC METUCHEN, NJ FCD FAIRCHILD COMMUNICATIONS SERVICES COMPANY LONG BEACH, CA FCE FLORIDA CONSOLIDATED MULTIMEDIA SERVICES INC GAINESVILLE, FL FCG FIRST COMMUNICATIONS GROUP INC NORTHBROOK, IL FCH FIRST CHOICE COMMUNICATIONS INC. NEW ORLEANS, LA FCI FUTURE COMMUNICATIONS INC DWIGHT, IL FCL FIRST CALL COMMUNICATIONS INC FARMINGTON HILLS, MI FCM FULMONT COMMUNICATIONS INC FCN FASTLINE COMMUNICATION NETWORK GARLAND, TX FCO FIRST CELLULAR OMAHA OMAHA, NE FCP FAXNET CORPORATION (PREV. FAIRFIELD COMPUTER CORPORATION) BOSTON, MA FCQ FRONTLINE COMMUNICATIONS INTERNATIONAL NEW YORK, NY FCR USE IAC CODE HWC SCHAUMBURG, IL FCS FIRST CELLULAR OF SOUTHERN ILLINOIS MT VERNON, IL FCT FOREST CITY TELECOM INC LAKE MILLS, IA FCZ FIRST CHOICE TECHNOLOGIES, INC. ELIZABETHTOWN, KY FDA FRANK DILL TRAVEL AGENCY INC FDB FIFTH THIRD BANK CINCINNATI, OH FDC AFFORD A CALL LIMA, OH FDE FIBERRIDE, INC. SAN CLEMENTE, CA FDF F D F COMMUNICATIONS CO BERNIE, MO FDG FIRST DIGITAL NETWORK LAS VAGAS, NV

Proprietary — Licensed Material See proprietary restrictions on title page. 9–68 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FDI FIRSTDIGITAL TELECOM, LLC. SALT LAKE CITY, UT FDK FREDERICK ELECTRONICS N MANCHESTER, IN FDL FIDELITY MOBILE SYSTEMS JEFFERSON CITY, MO FDM FREEDOM TELECOMMUNICATIONS, INC. CEDAR HILL, TX FDN FLORIDA DIGITAL NETWORK LONGWOOD, FL FDO FEDERAL LONG DISTANCE OPERATOR AUSTIN, TX FDP FRIENDSHIP LONG DISTANCE ALLEN, TX FDR FIRST DATA RESOURCES INC OMAHA, NE FDS FTC DIVERSIFIED SERVICES, INC. KINGSTEE, SC FDT FRIEND TECHNOLOGIES INC SAN FRANCISCO, CA FDU FIBER DATA COMMUNICATIONS, INC. CORPUS CHRISTI, TX FDW FLORIDA DIGITAL NETWORKS ORLANDO, FL FDY C.1.COM INC (PREV FUNDY CABLE LTD) SAINT JOHN, NEW BRUNSWICK, CN FEB FEB CORP BELLEVUE, WA FEC FUTURE MOBILE DISPATCH FED WORLDCOM TULSA, OK FEE FARMERS TELEPHONE COMPANY OF ESSEX ESSEX, IA FEI FEC COMMUNICATIONS, L.L.P. QUITMAN, TX FEL LONG DISTANCE OF MICHIGAN DBA FONETEL HAMTRAMCK, MI FEM FEC TELECOM, INC. ORLAND, FL FEO FREE STATE TELEPHONE COMPANY HALEYVILLE, AL FER FREEDOM RING COMMUNICATIONS, LLC DBA BAYRING PORTSMOUTH, NH COMMUNICATIONS FET FIBERNET, LLC CHARLESTON, WV FFA FIRST FONE OF AMARILLO AMARILLO, TX FFC FITCH F. CARY CORPUS CHRISTI, TX FFE FAIR FINANCIAL, L.L.C. DBA MIDSTATE TELECOMMUNICATIONS MADISON, TN FFL FERGUS FALLS LDS FERGUS FALLS, MN FFM FIRST FINANCIAL MANAGEMENT CORP ATLANTA, GA FFP FIRST FEDERAL SAVINGS & LOAN ASSOC OF PITTSBURGH INC PITTSBURGH, PA FFR FIBER FOUR CORPORATION ROCK PORT, MO FGD FARRIS LONG DISTANCE DALLAS, TX FGI FIRST PAGE, INC. FORT SMITH, AR FGW FONG-WINTERS ENTERPRISES (NOW WESTERN WIRELESS CORP. - SAN FRANCISCO, CA PCF) FHB FIRST HAWAIIAN BANK HONOLULU, HI FHC FOOTHILL CELLULAR & PAGING UPLAND, CA FHL FIRST CHOICE LOCAL COMMUNICATIONS, INC. MALUERN, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–69 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FHM FISHER MEDICAL NEW YORK, NY FHT FTTH COMMUNICATIONS LLC ROSEMONT, MN FIA FARMERS LONG DISTANCE, INC. RAINSVILLE, AL FIB FIBERNET, INC. CEDAR HILL, TX FIC FUTRONICS, INC. FREMONT, OH FID FIDELITY LONG DISTANCE, INC. SULLIVAN, MO FIE C2C FIBER, INC HOUSTON, TX FIL FIRST LINE COMMUNICATIONS, LLC EGG HARBOR, NJ FIM AT&T CORP. (PREV. NORTHPOINT COMMUNICATIONS, INC) SAN FRANCISCO, CA FIN FIRST REGIONAL TELECOM, LLC WASHINGTON, DC FIR FIRST INTERSTATE SERVICES CORP PORTLAND, OR FIS FRANCIS COMMUNICATIONS I, LTD EL PASO, TX FIT FIRST TELECOMMUNICATIONS SERVICES INC. CHICAGO, IL FKC FRANK’S COMMUNICATIONS HAYS, KS FLA CELLULAR ONE OF SOUTHWEST FLORIDA FORT MYERS, FL FLB FUNDAMENTAL BROKERS NEW YORK, NY FLC FLORIDA CELLULAR PLANTATION, FL FLD FLORIDA LONG DISTANCE ORLANDO, FL FLE FEDERAL EXPRESS CORP MENPHIS, TN FLG FLAGLER COMMUNICATIONS FLH FLASHNET TELECOM, INC FORT WORTH, TX FLI FACILICOM INTERNATIONAL, L.L.C. WASHINGTON, DC FLK FIBERLINK CONNECTION LLC FORT MORGAN, CO FLL FULLTEL INC OKLAHOMA CITY, OK FLM FRONTIER COMMUNICATIONS OF LAMAR COUNTY, INC. MILLPORT, AL FLN FIBERLINE INC SAN ANTONIO, TX FLO FRETEL COMMUNICATIONS, LLC ST. ANTHONY, ID FLP FAIRCALL CORPORATION DELRAY BEACH, FL FLR FRONTIER COMMUN OF AMERICA INC (PREV FRONTIER LD OF ROCHESTER, NY AMERICA) FLS FRONTIER LOCAL SERVICES INC. BINGHAM FARMS, MI FLT FLORIDA TELCOM LONG DISTANCE INC FLU FELIX EARL LABOME DBA F & L COMMUNICATIONS HOUSTON, TX FLX CITIZENS COMMUNICATIONS (PREV FLEX COMMUNICATIONS SYSTEM) DALLAS, TX FLZ FORTUNELINX INC. FORT LAUDERDALE, FL FMA FARMERS MUTUAL TELEPHONE COMPANY FRUITLAND, ID FMC FM CABLES INC FMD FEEK’S MOBILE DISPATCH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–70 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FMG REPUBLICAN NATIONAL TELEPHONE COMPANY (PREV FLEMING LONG DALLAS, TX DISTANCE FMH FARMERS MUTUAL TELEPHONE COMPANY OF NORA SPRINGS NORA SPRINGS, IA FMI FBN AMERICA, INC. EMMAUS, PA FMJ FORT MOJAVE LONG DISTANCE, INC. FORT MOHAVE, AZ FML FARMERS MUTUAL TELEPHONE COOP. SHELLSBURG, IA FMN FLORENCE METRONET INC MORRISVILLE, NC FMO FRAMCO, INC FARGO, ND FMP FRANKLIN MOBILPHONE FMR FRESNO MOBILE RADIO FMS FORT MYERS CELLULAR TELEPHONE CO FT MYERS, FL FMT FARMERS TELEPHONE CO INC PLEASANT VIEW, CO FMU FARMERS MUTUAL TECHNOLOGIES, INC. BELLINGHAM, MN FMV FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY MOULTON, IA FMX FAMILYTEL OF TEXAS, LLC MONROE, LA FNA USE IAC CODE MAF TULSA, OK FNB FIRST NATIONAL BANK OF MARYLAND BALTIMORE, MD FNC FIBERLINE NETWORK COMMUNICATIONS L P CARSON CITY, NV FND FBN AMERICA, INC. DBA FBN INDIANA EMMAUS, PA FNE WORLDCOM INC. (PREV. LDDS DBA FIRST PHONE OF NEW ENGLAND) TULSA, OK FNI FONENET INC CHICAGO, IL FNL FUSION TELECOM DEL RAY BEACH, FL FNN FONE.NET, LLC. CORTEZ, CO FNO CORECOMM NEWCO, INC DBA CORECOMM (PREV USN WORTHINGTON, OH COMMUNICATIONS) FNP FRONTIER PAGING LAMAR, CO FNR FONOROLA BUFFOLO, NY FNS USE IAC CODE TMU SALT LAKE CITY, UT FNT NEW PAR DBA AIRTOUCH CELLULAR (PREV FLINT CELLULAR SOUTHFIELD, MI TELEPHONE CO) FNW FIBER TECHNOLOGIES NETWORKS, L.L.C. ROCHESTER, NY FNX FON-EX INC NEW HOPE, PA FOA FONES 4 ALL CORP CALABASAS, CA FOC FOCAL COMMUNICATIONS CORP CHICAGO, IL FOE 4CONNECTIONS LLC BERNARDSVILLE, NJ FOH FOOTHILLS RURAL TELEPHONE COOPERATIVE CORPORATION STAFFORDSVILE, KY FOI AMCOM, LLC PHOENIX, AZ FOL FLORIDA CELLULAR (GA) SAVANNAH, GA FOM FIBER COMMUNICAITONS, INC. ROSEVILLE, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–71 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FON FONE INTERNATIONAL INC SCOTTSDALE, AZ FOP FNCI-FIBER-OPTIC NETWORK COMMUNICATIONS INC SAN DIEGO, CA FOR FORTE COMMUNICATIONS, INC. EVANSTON, IL FOS FRONTERA TELECOMMUNICATIONS, INC KERRVILLE, TX FOT FLORIDA TELEPHONE SERVICE ALTAMONTE SPRINGS, FL FOX FOX COMMUNICATIONS CORP BELLEVUE, WA FPA FRONT PAGE AALERT PAGING CO RANCHO CORDOVA, CA FPC FORT POINT TELEPHONE COMPANY, INC. BOSTON, MA FPD AFFORDABLE PHONE COMPANY, INC. NORRISTOWN, PA FPE BCCMMEX, INC. DBA FREEDOM PAGE-FREEDOM CELLULAR LEONARDTOWN, MD FPG FIRST PAGE, L.P. (PREV. FIRST PAGE INC.) WICHITA, KS FPI FAST PHONES, INC MONTGOMERY, AL FPL FPL FIBERNET, LLC MIAMI, FL FPN FAST PHONES OF NEBRASKA, CORP. LINCOLN, NE FPO FAR POINT SOUTH LAKE, TX FPR FREEPORT.COM, INC. PROVO, UT FPT FOREST PINE TELCOM FOREST HILL, TX FRA FORMS ASSOCIATES, INC. OMAHA, NE FRB FRED BURG COMMUNICATIONS STONEWALL, TX FRC FIRST RESERVE CORPORATION FRD FLORIDA RADIO PHONE FRE FREE TRADE COMMUNICATIONS DALLAS, TX FRG NORLIGHT TELECOMMUNICATIONS, INC(PREV FERGUS FALLS LONG DULUTH, MN DISTANCE) FRH FORESTHILL TELEPHONE CO FORRESTHILL, CA FRI FRANCE TELECOM INC NEW YORK, NY FRK FARKILL COMMUNICATIONS, INC LIBERTY, NY FRL FONOROLA MONTREAL, PQ FRM FRED ROSCOE DBA MOBILE PHONE ANSWERING CO FRN FERNS INC FRO FLAT RATE COMMUNICATIONS, INC. COLORADO SPRINGS, CO FRP FARNSWORTH RADIOPHONE FRR FORESTER RADIO FRS FRS SYSTEMS INC FRT FREEDOM TELECOMMUNICATIONS INC WALNUT CREEK, CA FRU FLAT ROCK COMMUNICATIONS, INC FLAT ROCK, IL FRW FIBEROPTIC NETWORK, INC. WINTER PARK, FL FRY FORSYTHE COMMUNICATIONS INC ENGLEWOOD, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–72 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FRZ FIRSTCOM, INC. MINNEAPOLIS, MN FSA FIRST OF AMERICA BANK - SE MICHIGAN N A PONTIAC, MI FSB FORT SMITH BEEPERS INC FSC FIRST CELLULAR LP VIENNA, VA FSD 24/7 COMMUNICATIONS INC. LOS ANGELES, CA FSE AUTO PERFECTION DBA FIVE STAR ENTERPRISES ODESSA, TX FSH 5 STAR PHONE CENTER CORPORATION FRANKFORT, IL FSI FIDELITY COMMUNICATION SERVICES II, INC. SULLIVAN, MO FSL EQUALNET CORP (PREV U S COMMUN & FIRST CHOICE LONG RICHARDSON, TX DISTANCE, INC FSM FRESH START COMMUNICATIONS, INC. PHOENIX, AZ FSN FAST CONNECTIONS, INC. DALLAS, TX FSO FIDELITY COMMUNICATIONS SERVICES 1, INC. ROLLA, MO FSP FIRST PAGE ALEXANDRIA, VA FSS FSS CELLULAR INC OF LUBBOCK LUBBOCK, TX FST FIRST COMMUNICATIONS INC OMAHA, NE FSU APPLIANCE & TV RENTALS, INC DBA FONES-4-U, INC. CRESTVIEW, FL FSV FROMM SERVICES FSW FONES WESTDIGITAL SYSTEMS (PREV FONES WEST) DENVER, CO FTA FARGO TEL ANSWERING SVC FTB FORT BEND LONG DISTANCE DBA TXU COMMUNICATIONS ROSENBERG, TX FTC ARRIVA COMMUNICATIONS, INC(PREV GLOBAL TELECOM INC) BAY SPRINGS, MS FTE FOOTHILL TELEPHONE EXCHANGE PLACEVILLE, CA FTF FLAGSTAFF NETWORK EXCHANGE FLAGSTAFF, AZ FTG FTC LONG DISTANCE (FUTURE TELEPHONE COMMUNICATIONS) DALLAS, TX FTH FEATHER COMMUNICATIONS FTI FIBERTECH TELECOM INC HOUSTON, TX FTK FIRST TELECOMMUNICATIONS NETWORK DALLAS, TX FTL USE IAC CODE IOX BRANDON, SD FTM USP&C, INC. (PREV. FUTURECOM, INC.) KANSAS CITY, MO FTN FAMILY TELEPHONE NETWORK FTO FRONTIER TELEPHONE OF ROCHESTER, INC ROCHESTER, NY FTR FLAT RATE NETWORK (PREV FLAT RATE COMMUNICATIONS) DALLAS, TX FTS FAITHNET TELECOMMUNICATIONS, INC. PLANO, TX FTT FEDERAL TRANSTEL INC ATLANTA, GA FTU FIRST USA DALLAS, TX FTW FLAG TELECOM NETWORK USA LIMITED WILMINGTON, DE FTX FIBERTEL, INC. SAN DIEGO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–73 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location FTY FIRST TELEPHONE COMPANY MIAMI, FL FUA FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY (HARLAN) HARLAN, IA FUE F. TURNER CORPORATION INC. DBA TCS OF NEW JERSEY ORANGE, NJ FUL FULL SERVICE COMPUTING PITTSBURGH, PA FUN FUTURES TECHNOLOGY, INC. BOHEMIA, NY FUS FARMERS’ AND BUSINESS MEN’S TELEPHONE COMPANY WHEATLAND, IA FUT FUTURE CONNECT PLANO, TX FUZ FUZION WIRELESS COMMUNICATIONS, INC. BOCA RATON, FL FVA FIVE AREA LONG DISTANCE, INC. MULESHOE, TX FVC FAYETTEVILLE COMMUNICATIONS INC FVI NORTHEAST OPTIC NETWORK INC (PREV FIVECOM INC) WESTBOROUGH, MA FVL USE IAC CODE HWC SCHAUMBURG, GA FVN FRIENDLY VOICE NETWORK KENNEDALE, TX FVW FAIRVIEW TELCOM PLANO, TX FWC FUTUREWAY COMMUNICATIONS INC. CONCORDE, ON FWL FLEETWOOD LONG DISTANCE OPERATOR AUSTIN, TX FWM FORT WAYNE MEDICAL SOCIETY FORT WAYNE, IN FWN NTELOS NETWORK INC. (PREV CFW NETWORK INC). WAYNESBORO, VA FWS FIRST WAY SERVICES HIGHLAND SPRINGS, VA FWT FIBERWATS SAN ANTONIO, TX FYE FREY’S ELECTRONICS ABERDEAN, SD FZM FRONTIER COMMUNICATIONS OF MISSISSIPPI RIENZI, MS GAB GABRIEL WIRELESS LLC BOCA RATON, FL GAC GALA COMMUNICATIONS DALLAS, TX GAE GEORGIA TELEPHONE SERVICES, INC. VALDOSTA, GA GAF GTE AIRFONE INC OAKBROOK, IL GAI GRANITE STATE TELEPHONE, INC. WEARE, NH GAL GALAXY TELECOMMS-CTR LIMITED GAN GOLDFIELD ACCESS NETWORK, L.C. GOLDFIELD, IA GAO GILES-CRAIG COMMUNICATIONS, INC. PEMBROKE, VA GAP GREAT ATLANTIC & PACIFIC CO INC (THE) MONTVALE, NJ GAT GSAT GBA GLOBALSTAR CANADA CO MISSISSAUGA, ON GBB COMCAST TELECOMMUNICATIONS, INC (PREV GLOBALCOM BALA CYNWYD, PA TELECOMM. INC) GBC GLOBAL COM LONGVIEW, TX GBD GIANT BEAR.COM WHITE PLAINS, NY GBE GLOBE TELECOMMUNICATIONS, INC. WEST POINT, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–74 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GBG GLOBAL CROSSING LTD MORRISTOWN, NJ GBH THE GOLDEN BELT TELEPHONE ASSOCIATION, INC. RUSH CENTER, KS GBI GLOBAL INTERNET COMMUNICATIONS, INC. (CA) NEWARK, CA GBJ GLADYS B JOINES GBL GABRIEL COMMUNICATIONS GBM GBM COMMUNICATIONS INC GBN GLOBENET CHICAGO, IL GBO GLOBAL TELECOMMUNICATION SOLUTIONS, INC. PHILADELPHIA, PA GBP GLOBAL NET PAGING INC DBA GLOBAL NET COMMUNICATIONS LOS VEGAS, NV GBQ GLOBALCOM INC. CHICAGO, IL GBR GLOBAL RATE PROCESSING, INC. IRVINE, CA GBS GBS COMMUNICATIONS GBT USE IAC CODE GBN CHICAGO, IL GBU GABRIEL COMMUNICATIONS CHESTERFIELD, MO GBV GLOBAL TELELINK SERVICES, INC. ATLANTA, GA GBW GLOBAL INTERNETWORKING, INC. VIENNA, VA GBY GLOBALEYES TELECOMMUNICATIONS, INC. MURPHYSBORO, IL GBZ GOBEAM SERVICES INC SAN RAMON, CA GCA TELEGLOBE CANADA INC. MONTREAL, PQ GCC NET-COM INC JACKSON, TN GCE GULF COAST ELECTRONICS GCF GTC TELECOM COSTA MESA, CA GCG GCI GLOBALCOM INC CHICAGO, IL GCH CUTTER COMMUNICATIONS, INC DBA GCEC TECHNOLOGIES VAN ALSTYNE, TX GCI GCI NETWORK GCK GCI COMMUNICATIONS INC ANCHORAGE, AK GCL GULF CENTRAL INTERNATIONAL GCM GENCOM INC GCN GENERAL COMMUNICATIONS INC ANCHORAGE, AK GCO GEICO WASHINGTON, DC GCP MEDE AMERICA (PREV. GENERAL COMPUTER CORP.) TWINSBURG, OH GCQ CCG CLEAR SPRING, MD GCR GULF COAST RADIOFONE NEDERLAND, TX GCS GENERAL COMMUNICATIONS SYSTEMS INC GCT GLOBECOM TELECOMMUNICATIONS INC NEW YORK, NY GCU GLOBE-COMM(USA), INC. RESTON, VA GCV GEOTEL COMMUNICATION SERVICES, INC. VENTURA, CA GCW GST TELECOM CALIFORNIA, INC.(PREV. GST LIGHTWAVE (CA),INC.) PLEASANTON, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–75 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GCX GCR TELECOMMUNICATIONS INC SOUTH BOSTON, VA GCY GLEN CANYON COMMUNICATIONS PAGE, AZ GDA GLOBAL TELDATA, INC. CHICAGO, IL GDB GLOBAL BROADBAND, INC. NEW YORK, NY GDC GRANDE COMMUNICATIONS HARLINGEN, TX GDP GROUP ADVANTAGE PROVIDERS LLC FOUNTAIN VALLEY, CA GDT GREATER MEDIA TELEPHONE INC WORCESTER, MA GEA G E AMERICAN COMMUNICATIONS INC PRINCETON, NJ GEC GREAT EASTERN COMMUNICATIONS CO WATERFORD, VA GEE GENESEE TELEPHONE COMPANY/CELLULARONE ROCHESTER, NY GEG THE GERSON GROUP, INC. BOSTON, MA GEH GE EXCHANGE STAMFORD, CT GEI GENERAL ELECTRIC INFORMATION SERVICES ROCKVILLE, MD GEL GREENE ELECTRONICS GEM GEETEL COMMUNICATIONS, INC. FRANKFORT, IN GEN GEN COM GEO GEO COMMUNICATIONS INC SAN ANTONIO, TX GEQ GOURMET EXPRESS INC DBA QUINTESSENTIAL TELECOM LAS VEGAS, NV CONSULTING TELECOM GER GLOBAL EXCHANGE CARRIER INC MANASSAS, VA GES GE CAPITAL COMMUNICATION SERVICES CORPORATION MARIETTA, GA GET GENERAL ELECTRIC CORP PRINCETON, NJ GEW GRANDE COMMUNICATIONS NETWORKS, INC. SAN MARCOS, TX GEX GTEL THOUSAND OAKS, CA GFH GLEN FALLS HOSPITAL GLENS FALLS, NY GFM GSA FINANCIAL MANAGEMENT GFO GRAFTON TECHNOLOGIES, INC. GRAFTON, IL GFS GLENS FALLS LONG DISTANCE SERVICE GLEN FALLS, NY GFT GRANITE FALLS TELEPHONE COMPANY REDMOND, WA GGB GGB SERVICE COMPANY DALLAS, TX GGI GEORGIA INDEPENDENT PCS, INC. MACON, GA GGN GILLETTE GLOBAL NETWORK, INC. NEW YORK, NY GHA GOLDEN HARBOR OF ALABAMA, INC SAN MARCOS, TX GHC GREEN HILLS COMMUNICATIONS, INC. BRECKENRIDGE, MO GHF GRANDE COMMUNICATIONS NETWORKS INC(PREV GOLDEN HARBOR - SAN MARCOS, TX FLORIDA... GHG GRANDE COMMUNICATIONS NETWORKS INC(PREV GOLDEN HARBOR SAN MARCOS, TX OF GEORGIA)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–76 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GHI GRANDE COMMUNICATIONS NETWORKS INC(PREV GOLDEN HARBOR SAN MARCOS, TX INDIANA) GHL GREEN HILLS TELECOMMUNICATIONS SERVICES BRECKENRIDGE, MO GHN GOLDEN HARBOR OF ILLINOIS, INC. SAN MARCOS, TX GHO GIPCO HOLDINGS INTERNATIONAL LTD HAMILTON, GA GHS GOLDEN HARBOR OF WISCONSIN, INC. SAN MARCOS, TX GHT GRANDE COMMUN NETWORK INC (PREV GOLDEN HARBOR -TEXAS SAN MARCOS, TX INC) GHW GOLDEN HARBOR OF WASHINGTON, INC. SAN MARCOS, TX GIA GIANT COMMUNICATIONS, INC. HOLTON, KS GIC GLOBAL INTERNET COMMUNICATIONS, INC. MARIETTA, GA GID GRID 4 COMMUNICATIONS, INC. BIRMINGHAM, MI GIE GENUITY SOLUTIONS INC (PREV GTE INTELLIGENT NETWORK IRVING, TX SERVICES INC) GII GLOBALCOM INTERNATIONAL, INC. SAN ANTONIO, TX GIL GILCO BAKERSFIELD, CA GIM GRANITE TELECOMMUNICATIONS LLC. QUINCY, MA GIN VERIZON SELECT SERVICES INC (PREV GTE COMMUNICATIONS CORP) IRVING, TX GIO GRAND RIVER COMMUNICATIONS, INC. PRINCETON, MO GIR USCARRIER TELECOM, LLC (PREV GEORGIA INDEPENDENT TELCO ATLANTA, GA GROUP LLC) GIS GLOBAL INFORMATION SERVICES INC. PALISADES PARK, NJ GIT GTE TELEPHONE OPERATIONS(PREV GTE INTERNAL IRVING, TX TELECOMMUNICATION SVC) GIY GRIDLEY COMMUNICATIONS, INC. GRIDLEY, IL GLA GILA COMMUNICATIONS GLB GLOBAL COMMUNICATIONS GLC GOLD COAST MOBILE TELEPHONE SYSTEM GLD NATIONAL INDEPENDENT CARRIER EXCHANGE INC(PREV GRP LONG FREEHOLD, NJ DIST,INC) GLE GLOBAL TELENET OXNARD, CA GLF GULF COAST COMMUNICATIONS GLG GULF LONG DISTANCE INC FOLEY, AL GLI GERMANTOWN LONG DISTANCE COMPANY GERMANTOWN, OH GLK GREAT LAKES TELECOMMUNICATIONS ROLLING MEADOWS, IL GLL GENCELL SAN DIEGO, CA GLM GALLIC COMMUNICATIONS GILLETTE, NJ GLN GLOBAL-NET, INC. PHOENIX, AZ GLO GLOBETEL INCORPORATED DUNN LORING, VA GLP GLOBAL PAYCOM INC. TAMPA, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–77 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GLR GLENNERIC COMMUNICATIONS INC. SANTA FE SPRINGS, CA GLS GLEN LAKES NETWORK SERVICE DALLAS, TX GLT GIL LEHFELDT GLU GLOBAL LINK COMMUNICATIONS, INC. MIAMI, FL GLV GALVESTON CELLULAR GALVESTON, TX GLW GIANTLOOP TELECOM, INC. WALTHAM, MA GLX GL COMMUNICATIONS INC GAITHERSBURG, MD GLY GLYPHICS COMMUNICATIONS, INC. DRAPER, UT GLZ ALEC, INC. (PREV GIETEL, INC.) NEW BERN, NC GMB GTE MOBILNET OF SAN DIEGO INCORPORATED SAN DIEGO, CA GMC GEORGETOWN COMMUNICATIONS MANAGEMENT CORP GME GENERAL COMMUNICATIONS & ELECTRONICS CORP. PINE BROOK, NJ GMG GUAM CELLULAR & PAGING TUMON, GU GMH AGI MANAGEMENT HOLDINGS, INC. DENVER, CO GMI GEMINI COMMUNICATIONS FORT COLLINS, CO GMJ CGM, L.L.C. ROSWELL, GA GML GREATER MINNESOTA CELLULAR CORP BROOKINGS, SD GMM GLOBAL ONE COMMUNICATIONS, L.L.C. RESTON, VA GMN GLOBAL MEDIA NETWORK INC MODESTA, CA GMO GLOBCOM, INC. GLENVIEW, IL GMP GULF MOBILEPHONE OF ALABAMA INC GMQ GMS COM INC LA HABRA HEIGHTS, CA GMR GLENWOOD MOBILE RADIO CO GMS GEM STATE TELEPHONE INC MOSCOW, ID GMT GTE MOBILENET INC. ROCKFORD, IL GMU GRANDVIEW MUTUAL TELEPHONE COMPANY PARIS, IL GMV GTE MEDIA VENTURES INCORPORATED IRVING, TX GMW GMW CO LUBBOTK, TX GNA GOLDEN HARBOR OF NORTH CAROLINA, INC. SAN MARCOS, TX GNC GENCON INC (NOW WESTERN WIRELESS CORP. - PCF) ST. LOUIS, MO GNE GENERAL TELECOM NEW YORK, NY GNI GUIDE NETWORK INTERNATIONAL MESQUITE, TX GNK GT NETWORKS VANCOUVER, BC GNL GENERAL CELLULAR CORP(NOW WESTERN WIRELESS CORP. - PCF) FAIRFIELD, CA GNM GAS COMPANY OF NEW MEXICO ALBUQUERQUE, NM GNN GRANTSBURG TELCOM, INC. GRANTSBURG, WI GNO GENCOM INC - OAKLAND GNP GLOBAL NAPS INC NORWOOD, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–78 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GNQ COMCOM INC - SAN DIEGO GNR GTE NORTH FORT WAYNE, IN GNS GENCOM INC - SAN DIEGO GNT GTE SPACENET CORP GNU GLOBAL NETWORK SOLUTIONS RESTON, VA GNW GOLDEN WEST RAPID CITY, SD GNX USE IAC CODE GCF COSTA MESS, CA GNY GLOBALNET INTERNATIONAL MARIETTA, GA GOA GOLD TEL CORPORATION MILL CREEK, WA GOB NSPOF COMMUNICATIONS, INC (PREV GLOBALNET CORPORATION) STAFFORD, TX GOC GOOD CONNECTIONS INC GOD GOLDFIELD TELEPHONE COMPANY GOLDFIELD, IA GOE GO-TEL, INC. DALLAS, TX GOH GOTHAM TELEPHONE COMPANY, INC. NEW HYDE PARK, NY GOI METROLINK (PREV. GLOBAL ONE INC.) CHICAGO, IL GOL GULF OIL COMMUNICATIONS INC HOUSTON, TX GOM GLOBAL TONE COMMUNICATIONS, INC. CULPEPER, VA GON GOLDEN VOICE GOLDEN, CO GOO GANOCO, INC. SAFETY HARBOR, FL GOP VERIZON SELECT SERVICES INC (PREV GTE COMMUNICATIONS CORP) IRVING, TX GOR GLOBAL CONNECTION INC OF AMERICA ATLANTA, GA GOS GOLDTONE COMMUNICATIONS, INC. BROOKLYN, NY GOT GLOBAL TELECOM LLC MADISON, WI GOU GTEL COMMUNICATIONS, L.L.C. HOWELL, MI GOV UNITED STATES GOVERNMENT GPC GEORGIA PAGING COMPANY OF SAVANNAH GPD GLOBAL PHOTON HOLDING CO. SAN DIEGO, CA GPG GTE HAWAIIAN TELEPHONE CO INC. DBA GTE PACIFICA-GUAM TAMUNING, GU GPH GRAPHNET INC TEANECK, NJ GPI GULFCOAST PAGING, INC. TAMPA, FL GPL GROUP LONG DISTANCE INC FORT LAUDERDALE, FL GPN GREAT PLAINS COMMUNICATIONS LONG DISTANCE, INC. BLAIR, NE GPO GROUP ONE COMMUNICATIONS INC GPQ GOPIN CORPORATION OTTAWA, ON GPR GLOBAL COM DE PUERTO RICO FT LAUDERDALE, FL GPU GPU TELCOM INC READING, PA GPW GEORGIA PUBLIC WEB, INC. ATLANTA, GA GRA GRANDE RIVER COMMUNICATIONS, INC. RAYMONDVILLE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–79 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GRC USE IAC CODE DTC SOUTHFIELD, MI GRD GRACEBA LONG DISTANCE, INC. ASHFORD, AL GRE GREAT EASTERN COMMUNICATIONS GRF GRAFTON LONG DISTANCE COMPANY INC. GRAFTON, IL GRG IT DOESN’T MATTER (PREV. GREGORIAN CALLS) KENNEDALE, TX GRH G. R. MISSOURI HOLDINGS, L. L. C. PRINCETON, MO GRI GRISWOLDS GRL GENERAL COMMUNICATIONS SERVICES GARLAND, TX GRM KCL, INC. (DBA GENERAL TELECOM) NEW YORK, NY GRN GRANITE STATE LONG DISTANCE WEARE, NH GRO GALLATIN RIVER COMMUNICATIONS LLC DES PLAINES, IL GRP GREAT PLAINS CELLULAR LP PHILADELPHIA, PA GRQ GRIC COMMUNICATIONS INC MILPITAS, CA GRR GRAPHIC RESULTS CORPORATION MIAMI, FL GRS GROCERS SUPPLY CO INC HUSTON, TX GRT GILLETTE RADIO TELEPHONE CO GRU GRUCOM GAINESVILLE, FL GRV GRANDE RIVER TELECOM, L.P. RAYMONDVILLE, TX GSA GENERAL SERVICES ADMINISTRATION WASHINGTON, DC GSC GRAPHIC SCANNING CORP GSD GASCARD CARLSBAD, CA GSE GMS ENTERPRISES CORP FORT LAUDERDALE, FL GSG GS PAGING LA VERNE, CA GSI GTE SPRINT INTERNATIONAL GSL USE IAC CODE CEJ ROSWELL, GA GSM GST TELECOM (PREV GST NET & GST PACWEST TELECOM, INC) VANCOUVER, WA GSN GOLDSTAR COMMUNICATIONS, LLC. NEW KNOXVILLE, OH GSO GS COMMUNICATIONS, INC. NORTHBROOK, IL GSP USE IAC CODE UTC OVERLAND PARK, KS GSR GENERAL SERVICES COMMISSION AUSTIN, TX GSS GENESIS COMMUNICATIONS INTERNATIONAL, INC. OLIVENHAIN, CA GST UNIVERSAL TELEPHONE & TELEGRAPH, LLC(PREV GARDEN ST LONG KINNELON, NJ DIS TEL) GSU GS COMMUNICATIONS, USA, INC. BROOKLYN, NY GSV GAINESVILLE REGIONAL UTILITIES DBA GRUCOM (CAP) GAINESVILLE, FL GSW GTE OF SOUTHWEST SAN ANGELO, TX GSX GENUITY SOLUTIONS INC BURLINGTON, MA GSY GRANNY SAYER’S G N B’S SODDY DALSYE, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–80 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GSZ TELENOR GLOBAL SERVICES AS OSLO, NW GTA GUAM TELEPHONE AUTHORITY TAMUNING, GU GTB GTE MOBILNET INCORPORATED ATLANTA, GA GTC GST CORP ALLENTOWN, PA GTD GRACEBA TOTAL COMMUNICATIONS DOTHAN, AL GTE GTE SATELLITE CORP GTF USE IAC CODE GTP THOUSAND OAKS, CA GTG GT GROUP TELECOM INC VANCOUVER, BC GTH GTECH CORP INDIANAPOLIS, IN GTI GTI TELECOMMUNICATIONS INC. FEDERAL WAY, WA GTJ GLOBAL TELEPHONE NETWORK, INC. LONG ISLAND CITY, NY GTK GEOTEK COMMUNICATIONS, INC. MONTVALE, NJ GTL GENERAL TELEPHONE INC GTM GTE TELEMESSAGER STAMFORD, CT GTN GLOBAL TELENET LOS ANGELES, CA GTO GTE SERVICE CORP D/FW AIRPORT, TX GTP VERIZON CALIFORNIA, INC (PREV GENERAL TELEPHONE CO) PLANO, TX GTQ GTC, INC. JAY, OK GTR VDL INC. DBA GLOBAL TELECOM BROKERS OWINGS MILLS, MD GTS SPRINT COMMUNICATIONS INC (PREV TELNET/GTE-TELNET SVCS) OVERLAND PARK, KS GTT GENUITY TELECOM, INC. (PREV GTE TELECOM INC) INDIANAPOLIS, IN GTU GLOBALTRON COMMUNICATIONS CORP DAVIE, FL GTV GLOBAL TELECOM SERVICES LTD BALA CYNWYD, PA GTW GATEWAY LONG DISTANCE SERVICES INC LAKE ST. LOUIS, MO GTX GST TEXAS LIGHTWAVE, INC. VANCOUVER, WA GTY GATEWAY COMMUNICATIONS, INC. WICHITA, KS GTZ THE GLOBAL TELE EXCHANGE MCLEAN, VA GUC GULF COAST LONG DISTANCE INC TAMPA, FL GUF GULF OIL CORP LAFFETTE, LA GUL GULF COMMUNICATIONS SERVICES SAN CARLOS, CA GUN GREEN STATE COMMUNICATIONS, INC. EAST ORANGE, NJ GUS GULF COAST COMMUNICATIONS, INC. (FL) PENSACLA, FL GUT GUTHRIE TELECOMMUNICATIONS NETWORK, INC. GUTHRIE CENTER, IA GVC GAVIN COMMUNICATIONS GVI GRAND VALLEY INTERNET, INC. GRAND JUNCTION, CO GVL GROVELINE LLC BOCA RATON, FL GVR GOLDEN VALLEY RADIO TURLOCK, CA GVS GUADALUPE VALLEY COMMUNICATIONS SYSTEMS, LP. NEW BRAUNFELS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–81 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location GVT GUADALUPE VALLEY TELEPHONE COOPERATIVE, INC. NEW BRAUNFELS, TX GVU GILA RIVER CELLULAR GENERAL PARTNERSHIP OKLAHOMA CITY, OK GVY GERVAIS TELEPHONE COMPANY GERVAIS, OR GWB GEORGE W. BUSH PROPERTIES, INC. MCKINNEY, TX GWD GLENWOOD TELEPHONE CO. GLENWOOD, GA GWE GREAT WEST SERVICES, LTD. DALLAS, TX GWI GST NEW MEXICO LIGHTWAVE, INC. (SUB. OF GST TELECOM, INC.) ALBUQUERQUE, NM GWL G & W COMMUNICATIONS CO (MERGED WITH BROWER NETWORK 1) CANTON, OH GWM GUAM WIRELESS TELEPHONE COMPANY LLC ALEXANDRIA, VA GWO GLOBAL TELEMEDIA INTERNATIONAL, INC ALPHARETTA, GA GWP GLOBAL NETWORK PROVIDERS, LLC WESTLAKE VILLAGE, CA GWT GATEWAY TELECOM, LLC WHEELING, WV GWV GSIWAVE.COM. INC. KENANSVILLE, NC GWY GATEWAY COMMUNICATIONS LTD GARLAND, TX GXC GLOBIX CORPORATION NEW YORK, NY GYE GRAYBILL ELECTRONICS INC HIAWATHA, IA GYL GREYHOUND LINES INC OMAHA, NE GYS GAYSHEN CORP (NEW NAME TTU) GYT GATEWAY TELEPHONE NORTH BAY, ON GYU GRUNDY CENTER COMMUNICATIONS UTILITY GRUNDY CENTER, IA HAC PRIMELINK, INC (PREV CHAMPNET COMMUNICATIONS, INC CHAMPLAIN, NY HAI HEYANITA INC LOS ANGELES, CA HAL ADELPHIA BUS SOLUTIONS OF AL, LLC (PREV HYPERION COMM BRIDGEVILLE, PA ALABAMA) HAM TOPSHAM TELEPHONE CO E CORINTH, VT HAN HOOD CANAL TELEPHONE CO., INC DBA HOOD CANAL UNION, WA COMMUNICATIONS HAP HASP INC HAR HARVEST TELECOM, INC. ENID, OK HAS HAVERHILL ANSWERING SERVICES HAT HERITAGE TECHNOLOGIES, LTD. HOUSTON, TX HAU HAUG COMMUNICATIONS, INC. SENECA, KS HAW HAWKINS COMMUNICATIONS HAY HARGRAY, INC. HILTON HEAD, SC HBC HEBENSTRAIT COMMUNICATIONS CORP. GREENBELT, MD HBD HBD TELECOM, INC DBA H & B PAGING MYRTLE BEACH, SC HBF HBF CELLULAR INC WAYNESBORO, MS HBK FIRST TECHNOLOGY, INCORPORATED HOLLYWOOD, FL HBR HEBRON CORPORATION OKLAHOMA CITY, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 9–82 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HBX HBC TEXASTEL, INC. DESOTO, TX HBY HARBOR BAY TELECOMMUNICATIONS ALMEDA, CA HCA NTCH-CA, INC. HERMOSA BEACH, CA HCC HUGHES COMMUNICATION CARRIER SERVICES WORLDWAY, CA HCE CHOICETEL, INC. PLYMOUTH, MN HCG HOOKS COMMUNICATIONS GROUP, INC. FALLS CHURCH, VA HCI HUGHES COMMUNICATIONS INC HCK HYPERION COMMUNICATIONS OF KENTUCKY, INC. BRIDGEVILLE, PA HCL HOLLYWOOD COMMUNICATIONS DALLAS, TX HCM HARBOR COMMUNICATIONS INC ST. JOSEPH, MI HCN HART COMMUNICATIONS CO AUSTIN, TX HCO HIGHLAND COMMUNICATIONS CORPORATION WARTBURG, TN HCP HAGERSTOWN CELLULAR PARTNERSHIP PROVIDENCE, RI HCR HIGHLAND CELLULAR INC BECKLEY, WV HCS HCS COMMUNICATIONS MAXI-CARE LOS ANGELES, CA HCT HCC TELEMANAGEMENT VENTURA, CA HCU ADELPHIA BUS SOLUTIONS OF CT, INC (PREV HYPERION COMM OF CT, BRIDGEVILLE, PA INC) HCV HYPERION COMMUNICATIONS OF VIRGINIA, LLC BRIDGEVILLE, PA HCW CHOCTAW TELECOMMUNICATIONS LLC HOUSTON, TX HCZ HCI RESTON, VA HDC ADELPHIA BUS SOLUTIONS OF DC (PREV HYPERION DISTRICT OF BRIDGEVILLE, PA COLUMBIA) HDD HD HOLDINGS, INC. PALM BEACH, FL HDE ADELPHIA BUS SOLUTIONS OF DE., LLC (PREV HYPERION COMM BRIDGEVILLE, PA DELAWARE) HDG HEDGES & ASSOCIATES INC SPRINGFIELD, MO HDI HOMEFRONT DSL, INC. CARMEL, IN HDP HIGHLAND DIGITAL PAGING, INC. BURNET, TX HDY HARDY TELECOMMUNICATIONS, INC. LOST RIVER, WV HEC CHEQUAMEGON TELECOMMUNICATIONS COMPANY, INC. CABLE, WI HEE HBC TELECOM, INC. MADISON, WI HEI HILLSON ENTERPRISES INC HEN HEINS SYSTEMS HEO THE CHEAPEST ONE CORP GARDEN CITY, NY HER USE IAC CODE EQN HOUSTON, TX HES HOPKINSVILLE ELECTRIC SYSTEM HOPKINSVILLE, KY HET HERITAGE TELECOMMUNICATIONS CORPORATION WASHINGTON, DC HEW CHOICE WIRELESS L.C. MUENSTER, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–83 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HEY HENRY COMMUNICATIONS, INC. DALLAS, TX HFB CHARTER FIBERLINK, LLC ST. LOUIS, MO HFC H-F COMMUNICATIONS CORP MIAMI, FL HFL ADELPHIA BUS SOLUTIONS OF FL (PREV HYPERION COMM OF BRIDGEVILLE, PA FLORIDA, LLC) HFM HUFFMAN COMMUNICATIONS HGA ADELPHIA BUS SOLUTIONS OF GA, LLC (PREV HYPERION COMM OF BRIDGEVILLE, PA GEORGIA) HGC HERRING COMMUNICATIONS JONESBORO, AR HGE SANDHILLS TELECOMMUNICATIONS GROUP, INC. DBA SANTEL COMM. DAYTONA BEACH, FL HGG HICKORY GROVE GROUP RICHARDSON, TX HGL HIGHLAND COMMUNICATIONS HGN HAGERSTOWN PARTNERSHIP GREENSBORO, NC HGP HEALTH GROUP TELECOMMUNICATIONS CO. OF NORTHWESTERN MEADVILLE, PA PENNSYLVANIA HGR THACKER-GRIGSBY TELEPHONE CO., INC. HINDMAN, KY HGS TEL-OPTIC,INC DBA UNIVERSAL NETWORK SVCS(PREV HUGHES LONG SAN ANTONIO, TX DIS.) HGT HG TELECOM, INC. FT. WORTH, TX HGY LOW COUNTRY CARRIERS INC DBA HARGRAY LONG DISTANCE HILTON HEAD, SC COMPANY HHC HILTON HOTELS CORP HHH HOFFMAN, HARVEY DBA H & S PAGERS CAMP HILL, PA HIA HI TECH COMMUNICATIONS OF IA NEW YORK, NY HIB HIBRIDOS TELECOMMUNICATIONS, INC. CAROLINA, PR HIC HI-COMMUNICATIONS INC HIG HIGHSPEED.COM, L.L.C. WALLA WALLA, WA HII HART INDUSTRIES INC HIL USE IAC CODE COC NEW YORK, NY HIN HILTON INTERNATIONAL CO HIO HINOTEL, INC. HARLINGEN, TX HIP HYPERION COMMUNICATIONS OF MISSISSIPPI, LP BRIDGEVILLE, PA HIS HOLLIS TELEPHONE COMPANY, INC. WILTON, NH HIT HOUSTON INTERNATIONAL TELEPORT HOUSTON, TX HIU CHILITECH INTERNET SOLUTIONS, INC. WILLIAMSPORT, PA HIX THE TELEPHONE CONNECTION IXC SERVICES, LLC LOS ANGELES, CA HJM HOWARD JOHNSON’S MOTOR LODGE HJP HOWARD JOHNSON’S MOTOR LODGE (PITTSBURGH) HKS HYPERION COMMUNICATIONS OF KANSAS, LLC BRIDGEVILLE, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–84 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HKT CYBERLINK PACIFIC TELECOM LIMITED (PREV HONGKONG TELECOM VANCOUVER, BC (CANADA) HKU CHICKAMAUGA TELEPHONE CORPORATION BAY SPRINGS, MS HKY HICKORY TELEPHONE COMPANY HICKORY, PA HLA HOLA COMMUNICATIONS INC CAROLINA, PR HLB HILLSBORO TELEPHONE CO ST LOUIS, MO HLC HLC - INTERNET, INCORPORATED IRVINE, CA HLD LCC (PREV HUNTSVILLE LONG DISTANCE CO) LUFKIN, TX HLG HART COMMUNICATIONS, INC. DBA HART TELEPHONE LONG HARTWELL, GA DISTANCE HLI CHASE TELECOMMUNICATIONS INC NASHVILLE, TN HLM HEALTH LIABILITY MANAGEMENT CORPORATION NAPLES, FL HLN HIGHLAND CELLULAR INC BERKELEY, CA HLO HELLO INTERNATIONAL, INC. HUNTSVILLE, AL HLR HAL-RAD RENO, NV HLS HOLSUM ROSWELL, NM HLT CHILLICOTHE TELEPHONE CO CHILLICOTHE, OH HLU HONOLULU CELLULAR HONOLULU, HI HLX HELMSCO INC WACO, TX HMA ADELPHIA BUS SOLUTIONS OF MA, INC (PREV HYPERION COMM MASS) BRIDGEVILLE, PA HMB HAZARD MOBILE TELEPHONE & PAGING SERVICE INC HAZARD, KY HMC HI-RIM COMMUNICATIONS INC LAS VEGAS, NV HMD ADELPHIA BUS SOLUTIONS OF MD, LLC (PREV HYPERION COMM OF BRIDGEVILLE, PA MARYLAND HMG HALL/MORGAN LONG DISTANCE DALLAS, TX HMI CHANDLER COMMUNICATIONS, INC. BIG BEAR LAKE, CA HML HAMILTON TELECOMMUNICATIONS (PREV. HAMILTON TELEPHONE AURORA, NE CO) HMM HOMETEL COMMUNICATIONS LLC ALAMOGORDO, NM HMN CHAMPLAIN TELEPHONE CO CHAMPLAIN, NY HMO HEMINGFORD COOPERATIVE TELEPHONE COMPANY HEMINGFORD, NE HMP HOME TELEPHONE COMPANY, INC. MONCKS CORNER, SC HMS HOMISCO MELROSE, MA HMT H & M TELECOMMUNICATION SERVICES CO HIGLANDS RANCH, CO HMU HARLAN MUNICIPAL UTILITY HARLAN, IA HMY HAMILTON COUNTY TELEPHONE CO-OP DALGREN, IL HNC HOUSTON CELLULAR TELEPHONE CO HOUSTON, TX HNG HOUSTON TELEPHONE AND PAGING, INC. HOUSTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–85 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HNH ADELPHIA BUS SOLUTIONS OF NH, INC(PREV HYPERION COM NEW BRIDGEVILLE, PA HAMPSHIRE HNI VYVX TELECOM INC (NOW WILTEL - WTL) HOUSTON, TX HNJ ADELPHIA BUS SOLUTIONS OF NJ, LLC, (PREV HYPERION COMM NEW BRIDGEVILLE, PA JERSEY HNP HANDY PAGE TEMPE, AZ HNR HANCOCK RURAL TELEPHONE CORP. MAXWELL, IN HNS HELICON NETWORK SOLUTIONS ENGLEWOOD CLIFFS, NJ HNT HOTEL NETWORKS LOS VEGAS, NV HNV SOUTHWESTERN BELL COMM SERVICES INC DBA NEVADA BELL LONG PLEASANTON, CA DISTANCE HNW HOST NETWORK, INC. BEVERLY HILLS, CA HNY HYPERION COMMUNICATIONS OF NEW YORK, INC. BRIDGEVILLE, PA HOC CHOICE ONE COMMUNICATIONS ROCHESTER, NY HOE HOMETOWN SOLUTIONS, LLC CHOKIO, MN HOG LCI INTERNATIONAL (PREV HOGAN COMMUNICATIONS) BELLEVUE, WA HOH HYPERION COMMUNICATIONS OF OHIO, INC. BRIDGEVILLE, PA HOI CHOICE TELCO, LLC HARTFORD, CT HOL HOME OWNERS LONG DISTANCE INC SAN ANTONIO, TX HOM HOME ORDER & MEDIA EXCHANGE ATLANTA, GA HON HONE COMMUNICATIONS SPRINGTOWN, TX HOP HOPPER TELECOMMUNICATIONS COMPANY, INC. WALNUT GROVE, AL HOR ADELPHIA BUS SOLUTIONS OF NC, L.P.(PREV HYPERION COMM N. BRIDGEVILLE, PA CAROLINA HOS HOSTTECH COMMUNICATIONS, LLC BARRINGTON, RI HOT HOME TELEPHONE COMPANY, INC. (KS) GALVA, KS HOU HAMILTON COUNTY COMMUNICATIONS, INC. DAHLGREN, IL HOY HOLT & COMPANY (I) CLARKSVILLE, TN HPA HYPERION COMMUNICATIONS OF PENNSYLVANIA, LLC BRIDGEVILLE, PA HPB TELENET INC DBA HYDE PARK BEEPERS & COMPUTING CHICAGO, IL HPC HEWLETT PACKARD COLORADO SPRS, CO HPD HARRISON PROPERLY DEVELOPMENT, INC. MONROEVILLE, NJ HPH HARRIS COMMUNICATIONS PHONE HOME VISALLA, CA HPI HYPERION COMMUNICATIONS OF INDIANA, LP BRIDGEVILLE, PA HPK HORIZON PHONE CARD BROOKLYN, NY HPL NTS COMMUNICATIONS, INC. (PREV HI-PLAINS NTS COMMUNICATIONS PAMPA, TX INC) HPM HYPERION COMMUNICATIONS OF MICHIGAN, INC. BRIDGEVILLE, PA HPN THE CHAMPAIGN TELEPHONE COMPANY URBANA, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–86 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HPP H P COIN PHONE COMPANY N. RICHLAND HILLS, TX HPS CHAPEL SERVICES INC RICHMOND, KY HPT HOSPITALITY TELCO MERCER ISLAND, WA HPW HIGH PLAINS MIDWEST, LLC HAYS, KS HRB H&R BLOCK INC KANSAS CITY, MO HRC HOUSER COMMUNICATIONS INC PEORIA, IL HRD HARRIS DIGITAL TELE NAVATO, CA HRG HERITAGE COMMUNICATIONS, INC. DUNCANVILLE, TX HRH ADELPHIA BUS SOLUTIONS OF RI., INC (PREV HYPERION - RHODE BRIDGEVILLE, PA ISLAND) HRI HEART OF IOWA COMMUNICATIONS, INC(PREV HEART OF IOWA UNION, IA TELEPHONE) HRK NET ONE INTERNATIONAL (PREV CHARITIES NETWORK ORLANDO, FL INTERNATIONAL, INC) HRL HEARTLAND COMMUNICATIONS CHICAGO, IL HRM HARMER COMMUNICATIONS KAHULUI, HI HRN HILL REFRIGERATION CORP LOS ANGELES, CA HRO HERITAGE COMMUNICATIONS CORP MELBOURNE, FL HRR HARRIS COMMUNICATIONS CO DURHAM, NC HRS HAROLD’S RADIO SERVICE INC HRT HAR-RELL TELCOM INC ARLINGTON, TX HRU HARBOR COMMUNICATIONS, LLC. MOBILE, AL HRV THREE RIVER TELCO LYNCH, NE HRW CHARLES R. WELLS GARDEN GROVE, CA HRZ HORIZON CELLULAR TELEPHONE CO BUTLER, PA HSA HSA TELECOM OPERATING CO., INC. LITTLETON, CO HSB HIGH SIERRA BUSINESS RADIO HSC HARRIS CORPORATION - TELECOMMUNICATION SYSTEMS DIVISION MELBOURNE, FL HSD CHESNEE LONG DISTANCE INC CHESNEE, SC HSE HYPERION SUSQUEHANNA TELECOMMUNICATIONS YORK, PA HSI HTS, INC. SAINT PAULS, NC HSL HASTEL CORPORATION HOSPERS, IA HSM CHASETEL COMMUNICATIONS NASHVILLE, TN HSN HAT-COM, INC DBA SENSIBLE COMMUNICATIONS MADISON, GA HSP CHESAPEAKE TELECOMMUNICATIONS CORPORATION WARSAW, VA HSS HESS COMMUNICATIONS RACINE, WI HST HYDE’S STAY IN TOUCH, INC. SHREVEPORT, LA HSV H.S.S. VENDING DISTRIUTORS CORAOPOLIS, PA HSX CHEYENNE RIVER SIOUX TRIBE TELEPHONE AUTHORITY EAGLE BUTTE, SD

Proprietary — Licensed Material See proprietary restrictions on title page. 9–87 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HTA HOTEL AMERICA LAS VEGAS, NV HTB HOME TELECOMMUNICATIONS OF NEBRASKA BRADY, NE HTC HOLYWELL TELECOMMUNICATIONS CO HTD HUSTAD INTER COMMUNICATIONS HTE HTR & L ENTERPRISES INC DBA HART COMMUNICATIONS VALDOSTA, GA HTG HUNTLEIGH TELECOMMUNICATIONS GROUP INC ST LOUIS, MO HTH HORRY TELEPHONE COOPERATIVE INC CONWAY, SC HTI HIGH TECK COMMUNICATIONS (WAS HIGH TECK INDUSTRIES) HTJ ADELPHIA BUSINESS SOLUTIONS (PREV HYPERION TELECOMM) PITTSBURGH, PA HTK HOSTING NETWORK INC FORT MYERS, FL HTL HO-TEL INC HTM HTC COMMUNICATIONS CO. WATERLOO, IL HTN HUNTINGTON CELLULAR GREENSBORO, NC HTO HTC COMMUNICATIONS INC HOOPER, NE HTP HORRY TELEPHONE LONG DISTANCE CONWAY, SC HTR HIGHLAND TELEPHONE COOPERATIVE, INC. SUNBRIGHT, TN HTS CHICKASAW TELECOMMUNICATIONS SERVICES, INC. SULPHUR, OK HTT HUTCHINSON TELECOMMUNICATIONS, INC. HUTCHINSON, MN HTU POINTE COMMUNICATIONS CORPORATION (PREV HTC COMMUN., LLC) EL MONTE, CA HTV HTC SERVICES, INC HALSTAD, MN HTW HOME TELENETWORKS, INC. ST. JACOB, IL HTX ADELPHIA BUS SOLUTIONS OF TEXAS, L.P. (PREV HYPERION TEXAS, BRIDGEVILLE, PA L.P.) HTZ HERTZ TECHNOLOGIES INCORPORATED OKLAHOMA CITY, OK HUB HUB DISTRIBUTING INC ONTARIO, CA HUI HTC COMMUNICATIONS, INC. CONWAY, SC HUN HUNTEL SYSTEMS, INC. BLAIR, NE HUS HIGHRISE COMMUNICATIONS SERVICES, LTD. GIVARD, OH HUT HUNTINGTON TELECOM HUNTINGTON, NY HUX HUXLEY COMMUNICATIONS COOPERATIVE HUXLEY, IA HVA HAVRE ANS SERVICE HVD HUDSON VALLEY DATANET, LLC. MONTGOMERY, NY HVN HARVARDNET INC PORTLAND, ME HVT CHAMPLAIN VALLEY TELECOM INC WAITSFIELD, VT HWA HIAWATHA TELEPHONE COMPANY MUNISING, MI HWC ACC OF WISCONSIN LLC (PREV CHIPPEWA CELLULAR CORPORATION) SCHAUMBURG, IL HWD HEALTH AND WELFARE AGENCY DATA CENTER SACRAMENTO, CA HWG HOLWAY LONG DISTANCE COMPANY MAITLAND, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–88 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location HWI HAWAIIAN WIRELESS, INC. HONOLULU, HI HWK HAWKINS COMMUNICATIONS INC LAUREL, MD HWS HAWKEYE SWITCHING LLC EMERSON, IA HWT HAWAIIAN TEL CO HWU HAWARDEN MUNICIPAL UTILITIES HAWARDEN, IA HWV ADELPHIA BUS SOLUTIONS OF WV LLC(PREV HYPERION COMM WEST BRIDGEVILLE, PA VIRGINIA HYB HYDE PARK BEEPERS & COMPUTERS - L.A. INC INGLEWOOD, CA HYC HAYNEVILLE TELEPHONE COMPANY, INC. HAYNEVILLE, AL HYD HYDEN COMMUNICATIONS KENNEDALE, TX HYF HAYNEVILLE FIBER TRANSPORT, INC., DBA HAYNEVILLE LONG HAYNEVILLE, AL DISTANCE HYH HYPERION TELECOMMUNICATIONS OF HARRISBURG HARRISBURG, PA HYI HARMONY INTERNATIONAL CORPUS CHRISTI, TX HYL HYPERION COMMUNICATIONS OF ILLINOIS, INC. BRIDGEVILLE, PA HYM HOWARD YOUNG MEDICAL CENTER WOODRUFF, WI HYO HYATT ORLANDO HYP HYE-PAGE HAWTHORNE, CA HYS ADELPHIA BUS SOLUTIONS OF SC, INC(PREV HYPERION OF SOUTH BRIDGEVILLE, PA CAROLINA HYT HYPERION COMMUNICATIONS OF TENNESSEE, L.P. NASHVILLE, TN HYV ADELPHIA BUS SOLUTIONS OF VT, INC (PREV HYPERION COMM OF BRIDGEVILLE, PA VERMONT) HZC HORIZON PERSONAL COMMUNICATIONS, INC. CHILLICOTHE, OH HZL HORIZON PERSONAL COMMUNICATIONS DBA HORIZON LONG CHILLICOTHE, OH DISTANCE HZM HORIZON TELECOMMUNICATIONS, INC. CHARLOTTE, MI HZN HORIZON CELLULAR TELCO FREDERICK, MD HZT HAZLE-TONE COMMUNICATIONS INC IAA INTERNATIONAL COMMERCE GROUP, LLC. SANTA ROSA, CA IAB INTRAE SAN FRANCISCO, CA IAC INPHO ACCESS CORPORATION NEW YORK, NY IAE INTERNATIONAL CALL CENTER INC. NEW YORK, NY IAG INTERNATIONAL TRADE RESOURCES GROUP LLC COLUMBUS, OH IAH INDIANA TELEPHONE CONNECT FORT WAYNE, IN IAI INTERNATIONAL TELE-SERVICES, INC. NORCROSS, GA IAK INTERNATIONAL TALK.COM, INC. AUSTIN, TX IAL INTERNATIONAL TELECOM INC ANCHORAGE, AK IAM IAMO TELEPHONE COMPANY COIN, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–89 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location IAN OLYMPIC TELECOMMUNICATIONS, INC.(PREV. MIRAGE MARKETING) SEATTLE, WA IAO INFONXX CARRIER NEW YORK, INC.(PREV INPHO ACCESS EASTON, PA CORPORATION) IAP IOWA RSA 2 LIMITED PARTNERSHIP EMERSON, IA IAR INTELLECARE.COM, INC. DALLAS, TX IAS IOWA NETWORK SERVICES INC WEST DES MOINES, IA IAT INTERAMERICAN TELEPHONE CO CORAL GABLES, FL IAU IOWA TELECOM COMMUNICATIONS, INC. NEWTON, IA IAY INTERCOMMUNICATION AMERICAN SYSTEMS, INC. NORTH MIAMI BEACH, FL IBC INTERNATIONAL BUSINESS CORES INC PHOENIX, AZ IBI IBASIS, INC BURLINGTON, MA IBM INTERNATIONAL BUSINESS MACHINES ARMONK, NY IBO INTERGLOBAL TELEPHONE COMPANY DBA ITC FT. LAUDERDALE, FL IBS USE IAC CODE IBM WHITE PLAINS, NY IBT INTERACTIVE BILLING TECHNOLOGIES INC LEAWOOD, KS IBW CINCINNATI BELL WIRELESS, LLC CINCINNATI, OH ICA IRONWOOD CALL AMERICA IRONWOOD, MI ICB CHOICE PHONE LLC DBA ICONN TUMON, GU ICC INTERSTATE CAROLINA CORP ICD ITC INC ERIE, PA ICE INLAND CELLULAR TELEPHONE CO ROSLYN, WA ICF INTERMEDIA COMMUNICATIONS (PREV INTERMEDIA COMM. OF TAMPA, FL FLORIDA,INC) ICG ICG TELECOM GROUP, INC(PREV INTELCOM GROUP INC) ENGLEWOOD, CO ICH USE IAC CODE ILO DALLAS, TX ICI INTERSTATE COMMUNICATIONS INC ICJ INTERCEL PCS SERVICES, INC. WEST POINT, GA ICK I:COMM NETWORKS SAN ANTONIO, TX ICL INTER CONTINENTAL TELEPHONE SAN DIEGO, CA ICM INDUSTRIAL COMMUNICATIONS ICN INTERCITY TELNET INC SPOKANE, WA ICO INTERCITY CALLING CO ICP INDUSTRIAL COMMUNICATIONS OF PECOS,INC PECOS, TX ICQ INTERNATIONAL TELECOMMUNICATION CORP. (PREV. ITC SAN DIEGO, CA CORPORATION) ICR USE IAC CODE ICS ICS INDUSTRIAL & COMMERCIAL COMMUNICATIONS SERVICE ICT WORLDCOM INC. (PREV. LDDS) TULSA, OK ICU ICON COMMUNICATIONS CORP SEATTLE, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–90 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ICV INTERNET COMMUNICATIONS SERVICES, INC. ROCHESTER, NY ICW INCLINE COMMUNICATIONS, INC. TAMPA, FL ICX ICOM HOLDING INC DBA ICOM COMMUNICATIONS NEW YORK, NY ICY INTRA COMMUNITY COMMUNICATIONS, INC. BALTIMORE, MD ICZ INTER-CONTINENTAL SERVICES NEWPORT BEACH, CA IDA INDIANA DIGITAL ACCESS INDIANAPOLIS, IN IDB IDB COMMUNICATIONS GROUP INC NY, NY IDC INTERNET DATACOM ENGLEWOOD, CO IDD I DON’T CARE INC. (ON) BRADFORD, ON IDE INDEPENDENT CELLULAR NETWORK FORT MEYERS, FL IDG POINTECOM, INC (PREV INTERNATIONAL DIGITAL TELE SYSTEMS) MIAMI, FL IDH IDAHO COMMUNICATIONS BOISE, ID IDI INTRADO INC BOULDER, CO IDK SCINDO NETWORKS INC. GREENWOOD VILLAGE, CO IDM INTERNET DATACOMM INC ENGLEWOOD, CO IDN INDIANA SWITCH INC INDIANAPOLIS, IN IDO INDIANTOWN TELEPHONE SYSTEM INC INDIANTOWN, FL IDP IDAHO PAGING IDQ CIMA TELECOM, INC (PREV INTERDATA COMMUNICATIONS) MIAMI, FL IDR IDT CORPORATION HACKENSACK, NJ IDS IDS LONG DISTANCE INC HOLLYWOOD, FL IDT IDAHO TELE-PAGING SERVICE IDU INTERNATIONAL DISCOUNT TELECOMMUNICATIONS CORP HACKENSACK, NJ IDV INTER DIVISION COMM ARLINGTON, TX IDW SATLINK 3000, INC DBA INDEPENDENT NETWORK SERVICES INC BOISE, ID IDX IDN, LLC COLUMBIA, SC IEA INDUSTRIAL ELECTRONICS AND AUTOMATION CO IEB INTRALEC, INC. ATLANTA, GA IEC IEC COMMUNICATIONS INC SAN FRANCISCO, CA IED INTEGRATED TELEPHONE SERVICES CORPORATION WAYNE, NJ IEE INTER-TEL NETSOLTIONS PHOENIX, AZ IEG IDEAONE TELECOM GROUP, LLC FARGO, ND IEH INTERSTATE TELEPHONE COMPANY LANETTE, AL IEI INTTEC, INC. GILLETTE, WY IEK CIERA NETWORK SYSTEMS, INC. HOUSTON, TX IEL ICNET, LLC SALISBURY, MD IEM THE INSIDE EDGE COMMUNICATIONS INC TAMPA, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–91 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location IEN INDEPENDENT NETWORKS, L.L.C. TERRIL, IA IEO IT&E OVERSEAS, INC TAMUNING, GU IEP INTERSTATE ENTERPRISES, LTD TRURO, IA IER INTERNATIONAL TELEPHONE CORPORATION MISSION VIEJO, CA IES ASIATONE, LLC OXFORD, MD IET INTERSTATE TELEPHONE TWIN FALLS, ID IEU INTER TELECOMMUNICATIONS, INC. EVANSTON, IL IEV CONNECTSOUTH COMMUNICATIONS, INC (PREV ICONNECT CORP) AUSTIN, TX IEW SAIL NETWORKS INC. ALPHARETTA, GA IEX INTEX ATLANTA, GA IEZ INTERNET ENGINEERING SYSTEMS INC SUNRISE, FL IFA USP&C, INC. (PREV. INFO ACCESS) KANSAS CITY, MO IFC GST TELECOM (PREV GST NET, INC. & INTL TELEMANAGEMENT LIMA, OH GROUP,INC) IFE INFOSPACE INC BELLEVUE, WA IFF IFC COMMUNICATIONS MALIBU, CA IFG INFONET LONG DISTANCE, L.L.C. KINGFISHER, OK IFI INDIAN NATIONS FIBER OPTICS, INC. OKLAHOMA CITY, OK IFK INFOLINK COMMUNICATIONS, LTD DALLAS, TX IFL INTEGRA FINANCIAL CORP PITTSBURG, PA IFM INFORMATION AND COMMUNICATIONS SERVICES INC MANKATO, MN IFN INTERSTATE FIBERNET WEST POINT, GA IFO INFOSPAN, INC. CARROLLTON, TX IFP IFC CELLULAR PARTNERS WYCOMBE, PA IFR INFOSERVE TELECOM CORPORATION HAUPPAUGE, NY IFS INFORMATION & TELEPHONE SERVICES ORLANDO, FL IFT INFO-TEL OPERATOR SERVICES INC LITTLETON, CO IFW INTERACTVE INFORMATION NETWORK, INC. SYOSSET, NY IGA INTEGRATED SYSTEMS CORPORATION OKLAHOMA CITY, OK IGB INTERGLOBE COMMUNICATIONS STATEN ISLAND, NY IGC CIGNAL GLOBAL COMMUNICATIONS CARRIER SERVICES, INC. CAMBRIDGE, MA IGD INTEGRATED COMMUNICATIONS CONSULTANTS CORPORATION MARINA DEL REY, CA IGE FIRST INTERNATIONAL TELECOM INC DBA IGAEA NASHVILLE, TN IGI IG2, INC. KEW GARDENS, NY IGM PEARSON/VAIL INC DBA INTEGRATED TELECOMMUNICATIONS JONESBORO, AR SERVICES IGN MILLINGTON TELEPHONE COMPANY INC. MILLINGTON, TN IGO TIAGRIS CORPORATION MCALLEN, TX IGP INTERNATIONAL TELEPHONE GROUP, INC MORRISTOWN, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 9–92 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location IGR INTEGRATED NETWORK SERVICES INC (INSINC) VANCOUVER, BC IGS IDAHO GROWER SHIPPERS ASSOCIATION IDAHO FALLS, ID IGT INTEGRETEL INC SAN JOSE, CA IGU INTEGRATED COMMUNICATION SOLUTIONS, LLC CANTON, OH IGV INTERURBAIN GUEVREMONT LTEE STE ROSALIE, PQ IGW AIRGATE WIRELESS, L.L.C. CHARLOTTE, NC IHA INTERPATH COMMUNICATIONS, INC. MORRISVILLE, NC IHC INTERNATIONAL HARVESTER CO IHP IRVING H. PARKER DBA BEEPERS & MORE BELLFLOWER, CA IHV INDUSTRY HILLS VISITOR ACCOMOD IIC INDICOM LAWRENCEBURG, IN IID INSIGHT COMMUNICATIONS OF INDIANA, LLC NEW YORK, NY IIE INCISCENT, INC. FALLS CHURCH, VA IIM ILLICOM TELECOMMUNICATIONS, INC. PAXTON, IL IIN INFORMARK INTERNATIONAL INC DENVER, CO IIP ILLINOIS PCS, L.L.C. GENESEO, IL IIR CITISTREAM COMMUNICATIONS, INC. LINCOLN, NE IIS INTERNEX INFORMATION SERVICES INC MENLO PARK, CA IIT STI COMMUNICATIONS INC COSHOCTON, OH IJN INTER-TEL.NET RENO, NV IKC INTERACTIVE NETWORK CONCEPTS INC. TROOPER, PA IKI INTERTEK INDUSTRIES ALBANY, NY IKK CITIZENS TELEPHONE COMPANY OF KECKSBURG MAMMOTH, PA IKP INTERLINK PAGING MELBOURNE, FL IKU INTERLINK COMMUNICATIONS PARTNERS LLLP PT. PLEASANT, WV ILA ISLAND PAGE HONULULU, HI ILB ILLINOIS BELL CHICAGO, IL ILC INTERSTATE TELECOM SERVICES INC DUNCANVILLE, TX ILD INDEPENDENT LONG DISTANCE ALTAMONTE SPRINGS, FL ILE INTELECORP CORPORATION CHESTNUT HILL, MA ILF ILLINOIS INTRANETWORK, INC. PEORIA, IL ILG INTELNET.NET WASHINGTON, DC ILH ILLINOIS TELEPHONE CORPORATION FRANKLIN PARK, IL ILI I-LINK INC AUSTIN, TX ILK USE IAC CODE ILO COVINGTON, GA ILL ILLINOIS CONSOLIDATED BUSINESS SYSTEMS MATTOON, IL ILM INTERNATIONAL MESSAGE TELEPHONE SERVICE INC OMAHA, NE ILN INTELNET COMMISSION INDIANAPOLIS, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–93 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ILO ILD TELECOMMUNICATIONS, INC. ADDISON, TX ILP ILLINOIS FOUR LIMITED PARTNERSHIP MATTOON, IL ILQ ILINQ TECHNOLOGIES, INC. DALLAS, TX ILR INTERNATIONAL RELAY NEW YORK, NY ILS ILLINOIS SIGNAL COMMUNICATIONS INC QUINCY, IL ILT INTERNATIONAL TELEPHONE CO, INC. NEW YORK, NY ILU INTELLA COMMUNICATIONS INC. BAY SHORE, NY ILV ILLINOIS VALLEY CELLULAR MARSEILLES, IL ILW CITADEL SOFTWARE, INC. BROOKVILLE, IN ILX TCI OF ILLINOIS, INC. MOLINE, IL ILY ILINE LLC SAN ANTONIO, TX ILZ INLEC COMMUNICATIONS, INC. PHILADELPHIA, PA IMA INTER-MOUNTAIN CABLE, INC. HAROLD, KY IMB IDAHO MOBILE TELEPHONE SERVICE BOISE, ID IMC USE IAC CODE IMR AUSTIN, TX IME INNOCOM TELECOM LLC OAKLAND, CA IMF INTERMOUNTAIN MOBILEFONE IMI INTERMOUNTAIN COMMUNICATIONS MOUNTAIN HOME, ID IMK INTERACTIVE MARKETING TECHNOLOGIES, INC. CINCINNATI, OH IML IMC TELECOM INC ROCKVILLE, MD IMM INTEGRA TELECOM OF MINNESOTA, INC. PRIOR LAKE, MN IMN IRIDIUM NORTH AMERICA TEMPE, AZ IMO INTERNET COMMUNICATIONS LLC BAINBRIDGE, NY IMP INTERSTATES MOBILEPHONE CO IMQ IMPULSE COMMUNICATIONS INC SACRAMENTO, CA IMR COMMUNICATIONS TRANSMISSION INC (FMLY INRNATL MWV) AUSTIN, TX IMS INTERNATIONAL MOBILE TRACKING SYSTEM AUSTIN, TX IMT USE IAC CODE INC ANAHEIM, CA IMU MILLENNIUM 2000, INC. DBA INTOUCH COMMUNICATIONS HARRISONBURG, VA INA U S WEST INTERPRISE AMERICA (PREV INTERPRISE NETWORK. DENVER, CO SERVICES) INB INLAND MOBILE COMMUNICATIONS ONTARIO, CA INC MOBILEMEDIA COMMUNICATIONS, INC. (PREV. INDUSTRIAL COMM. LA PALMA, CA SYSTEMS) IND INDIANAPOLIS TELEPHONE COMPANY INC INE I-NET CORP DALLAS, TX INF INFOCOM INTERNATIONAL INC CHICAGO, IL ING BELL WEST INC. (PREV BELL INTRIGNA INC) EDMONTON, AB INH INTELLIGENCE NETWORK ONLINE INC CLEARWATER, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–94 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location INI IN-TOUCH COMMUNICATIONS, INC. SAN ANTONIO, TX INJ INTERNATIONAL TELECOMMUNICATIONS SYSTEMS INC BOCA RATON, FL INK INTER COMM MANAGEMENT NETWORK VAN NUYS, CA INL INTELCO INM INTERNATIONAL TELCOM, LTD. SEATTLE, WA INN INNOTECH CORPORATION BLOOMINGTON, IL INO IN TOUCH COMMUNICATIONS SERVICES, INC. OCEANSIDE, NY INP INLAND TELEPHONE CO UNIONTOWN, WA INQ INTERCONTINENTAL COMMUNICATIONS GROUP, INC DBA ICG DELRAY BEACH, FL INR INTERNET INC RESTON, VA INS INTERSTATE NETWORK SYSTEMS WANTAGH, NY INT INTERSTATE TELEPHONE INC INU INDUS, INC. MILWAUKEE, WI INV INNOVATIVE COMMUNICATIONS INW ILLUMINET (PREV. INDEPENDENT TELECOMMUNICATIONS NETWORK KANSAS CITY, MO INC.) INX INTELEX MADISON, WI INY INNOTRAC, CORPORATION NORCROSS, GA INZ INTERNATIONAL TELECOMMUNICATIONS NETWORK NEW BRAUNFELS, TX IOA TCI TELECOM, LLC FLUSHING, NY IOC INTEGRA TELECOM OF MINNESOTA INC(PREV INFO-TEL COMMUN. BEAVERTON, OR INC) IOD INTERNATIONAL LONG DISTANCE CORPORATION ATLANTA, GA IOE ICORE, INC EMMAUS, PA IOG CITIZENS LONG DISTANCE COMPANY (MO) HIGGINSVILLE, MO IOI INTERSTATE OPERATORS, INC. GLENN HEIGHTS, TX IOL 555 INFOTEL DIRECTORY CARSON CITY, NV IOM ICOM ION INTERNATIONAL OFFICE NETWORKS CORAL SPRINGS, FL IOO IRONTON TEL CO COPLAY, PA IOP INTERNATIONAL OPERATORS, INC. DESOTO, TX IOR MCLEODUSA TELECOMMUNICATION SERVICES. INC (PREV MCLEOD DES MOINES, IA NETWORK) IOS IONOSPHERE INC GREENVILLE, SC IOT MICRO TEL BOCA RATON, FL IOU AIRCOVER NETWORK SOLUTIONS, INC. THORNTON, CO IOW INTERCOM NETWORK, INC MIAMI, FL IOX IONEX TELECOMMUNICATIONS INC DALLAS, TX IPA INSTANT PAGE USA SOUTHFIELD, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–95 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location IPB INFO PLUS OF BOSTON NEEDHAM, MA IPC WORLDCOM INC.(PREV. LDDS/WORLDCOM) TULSA, OK IPD INDEPENDANT CELLULAR NETWORK FORT MYERS, FL IPE INTERLOOP, INC HOLLYWOOD, FL IPG INTERNATIONAL PAGING CORP PASADENA, CA IPH INDEPENDENT TELEPHONE CO INC HARDINSBURG, KY IPI INTER-PAGE INC. WEST SENECA, NY IPK IMPACT NETWORK SOLUTIONS, INC. FINDLAY, OH IPL INTELEPLEX CORP IPN INDIANA PAGING NETWORK INC MICHIGAN CITY, IN IPO IP COMMUNICATIONS CORPORATION DALLAS, TX IPR IMPERIAL COMMUNICATIONS IPS AT&T CONTRACT SERVICES ATLANTA, GA IPT INDEPENDENT TELCOM ASSOC., INC. LOUISVILLE, IL IPU INSPIREN COMMUNICATIONS, INC. MONUMENT, CO IPX IXNET (SUB OF GLOBAL CROSSING, LTD) NEW YORK, NY IPY IPX INC JERSEY CITY, NJ IPZ IPS TELECOM, INC. ENGLEWOOD, CO IQC IQC, LLC. WAXAHACHIE, TX IQT IQ TELECOM, INC. BLUE ISLAND, IL IRA INTERACCESS CO. CHICAGO, IL IRB INTERURBAIN SOGETEL INC. NICOLET, CN IRC INTER CONTINENTAL TELEPHONE SAN DIEGO, CA IRD INDUSTRIAL RADIO SALES INC OKLAHOMA CITY, OK IRE INTERNET EXPRESS SAN JOSE, CA IRF INTRASTATE RADIO TELEPHONE INC - SAN FRANCISCO IRG IRT GENCOM LOS ANGELES, CA IRI ITTEL CARRIER, INC. WHITESTONE, NY IRL INTRASTATE RADIO TELEPHONE INC - LOS ANGELES IRM INTERCONTINENTAL COMMUNICATION CORP. CHANTILLY, VA IRN INTRANET COMMUNICATION INC SEATTLE, WA IRO IRONTON LONG DISTANCE CO COPLAY, PA IRP INTERPAGE INC MOUNTAINVIEW, CA IRR INTERNATIONAL CALLING SERVICES, L.C. LONGVIEW, TX IRS IOWA RADIO SERVICE INC IRT INTRASTATE RADIO TELEPHONE INC IRU INTEROUTE, INC BRICK, NJ IRW AIRCOMM WIRELESS AND CABLE HOUSTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–96 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location IRX INTERNEXT COMMUNICATIONS, INC. SILVER SPRING, MD ISA USE IAC CODE UTC OVERLAND PARK, KS ISC INSTITUTIONAL COMMUNICATIONS CO MC LEAN, VA ISD ISLAND DIRECT CALLS ARLINGTON, TX ISE ISS ENGINEERING INC PALO ALTO, CA ISF INTERLINK ADVERTISING SERVICES, INC. DBA FORETHOUGHT.NET DENVER, CO ISG IDAHO STATE GOVERNMENT BOISE, ID ISI INTEGRAL SYSTEMS INC SALT LAKE CITY, UT ISL AT&T INFORMATION SYSTEMS LABORATORY DENVER, CO ISM ISC OF MIAMI, INCORPORATED MIAMI, FL ISN INTERNATIONAL SERVICES NETWORK, INC DBA ISN MIAMI, FL COMMUNICATIONS ISO THE ISLAND TELEPHONE COMPANY LIMITED PRINCE EDWARD ISLAND, CN ISP INTERNATIONAL DESIGN GROUP, INC DBA USA TELECOM DANIA, FL ISQ ISLANET INC SAN JUAN, PR ISR IACT SERVICES ALLEN, TX ISS ALPHAQUEST NETWORK SERVICES, INC(PREV ISS/NETWORK APIOS, CA SERVICES) IST INSTANT COMMUNICATIONS ISU INTERNATIONAL SATELLITE TELECOMMUNICATIONS INC COCONUT GROVE, FL ISV INTERSTATE SAVINGS INC WILLOW GROVE, PA ISW ISP TELECOM INC. MONTREAL, PQ ISX INTERSVIAZ, INC. NEWARK, DE ISY ITC TRANSMISSION INC WEST POINT, GA ISZ AIRSIGNAL INTERNATIONAL OF PITTSBURGH PA INC ITA INTERNATIONAL TELEMEDIA ASSOCIATES,INC ATLANTA, GA ITB INTERCALL, INC. LYNDHURST, NJ ITC INTERCALLINC ITD INTERMEDIA COMMUNICATIONS INC ST PETERSBURG, FL ITE INDEPENDENCE TELEPHONE CO INDEPENDENCE, OH ITF INTERNATIONAL TELECOMMUNICATION SERVICES, INC. FORT LAUDERDALE, FL ITG USE IAC CODE ONR DALLAS, TX ITH INTERPHONE CO COLUMBIA, MO ITI INTERSTATE TELEPHONE INTERCONNECT INC ITJ INTERNATIONAL TELESTAR, INC. SCOTCH PLAINS, NJ ITK INTELELINK BRAMPTON, ON ITL INTELCOM ITM INTER-MOUNTAIN COMMUNICATIONS SOUTH LAKE TAHOE, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–97 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ITN INTERNET TELECOMMUNICATIONS SERVICES BEAVERTON, OR ITO INTL TELECOMMUNICATIONS SYSTEMS INCORP WASHINGTON, DC ITP ISLAND TELEPAGE SYSTEMS ITQ ITN CORP (DBA NORTHQUEST TELECOM, INC.) TORONTO, ON ITR INTER-TEL BELLINGHAM, WA ITS INTERCHANGE SYSTEMS ITT WORLDCOM INC. (PREV. LDDS) TULSA, OK ITU ITT - USTS ITV ENHANCED GLOBAL CONVERGENCE SERVICES INC(PREV INNOVATIVE NASHUA, NH TELECOM) ITW WU WORLD COMMUNICATIONS INC (MRG-ITT WORLD COMM & W U HONOLULU, HI CORP) ITX ITI INCORPORATED PAOLI, PA ITY INTERACTIVE TELECOM NETWORK INC AGOURA, CA ITZ ITC INC SALT LAKE CITY, UT IUA INTERNET USA CORPORATION WATERTOWN, NY IUC INDIANHEAD COMMUNICATIONS CORPORATION HECTOR, MN IUH IN TOUCH COMMUNICATION SYSTEMS, INC. IRVINE, CA IUI ICG COMMUNICATIONS, INC PROVIDENCE, RI IUN I.C.U.C., INC. NORTH BELLMORE, NY IUP CIRRO GROUP, INC. PLANO, TX IUS INTELECOM SOLUTIONS, INC. PLAINVIEW, NY IUT USE IAC CODE TQW SALT LAKE CITY, UT IUW CINGULAR WIRELESS LLC ATLANTA, GA IVC IVIT COMMUNICATIONS GROUP, INC. KILGORE, TX IVD INTERACTIVE VOICE DATA SYSTEMS INC FLUSHING, NY IVE INTEGRATION SERVICES INTERNATIONAL, INC. FT. LAUDERDALE, FL IVG INTERCONNECT SERVICES, L.L.C. WAYNE, NJ IVH INVENTIVE TECHNOLOGY, LTD ELK CITY, OK IVI INLAND VALLEY INTERNET & COMPUTERS HEMET, CA IVM IMPERIAL VALLEY MOBILE PHONE CUCAMONGA, CA IVN INET INTERACTIVE NETWORK SYSTEM, INC. LOS ANGELES, CA IVS INTEGRATED TELESERVICES FRESNO, CA IVT INVISION TELECOM INC. BEDFORD, MA IVW INTERACTIVE NETWORK SYSTEMS, INC. BLACKWOOD, NJ IVY YALE UNIVERSITY NEW HAVEN, CT IWA IOWA TELECOMMUNICATIONS SERVICES, INC. NEWTON, IA IWC INTERMOUNTAIN WEST COMMUNICATIONS INC BOISE, ID IWI INTELLISWITCH INC WEST PALM BEACH, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–98 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location IWK INTERNETWORKS INC ALOHA, OR IWL IWL COMMUNICATIONS INC FRIENDSWOOD, TX IWN CITY OF NEWNAN & NEWNAN WATER, SEWERAGE & LIGHT COM DBA NEWNAN, GA NEWNAN .. IWO CI2, INC. ATLANTA, GA IWS IOWA WIRELESS SERVICES, LP DES MOINES, IA IWW ICT WORLDWIDE, INC. TAMPA, FL IXC BROADWING COMMUNICATIONS SERVICES INC (PREV IXC COMM. AUSTIN, TX SERVICES) IXH INTERNATIONAL EXCHANGE COMMUNICATIONS, INC. DBA IECOM SANTA ANA, CA IXO ITXC CORP PRINCETON, NJ IXS INTELLISTAR COMMUNICATIONS, INC. HOUSTON, TX IXT INTERNATIONAL TELNET, INC. MIAMI, FL IYA CITY OF LAKELAND LAKELAKE, FL IYC INNOSYS COMMUNICATIONS INC LOS ANGELES, CA IYL CITY-LINK COMMUNICATIONS SALT LAKE CITY, UT IYP CITY OF PORTLAND DBA INTEGRATED REGIONAL NETWORK PORTLAND, OR ENTERPRISE IYS CITY SIGNAL COMMUNICATIONS, INC. (PREV CITY SIGNAL COMM., STRONGSVITLE, OH L.L.C.) IYT CITYNET TELECOM, INC. SILVER SPRING, MD IYV CITY OF CARTERSVILLE CARTERSVLLE, GA IZE CITIZENS TELEPHONE COMPANY BREVARD, NC IZI CITIZENS TELECOMMUNICATIONS COMPANY PLANO, TX IZL CITIZENS LONG DISTANCE, INCORPORATED HAMMOND, NY IZP CITIZEN PHONE, INC. HALEYVILLE, AL IZT RSL COM USA,INC(PREV INTERNATIONAL TELECOMMUNICATIONS VALLEY STREAM, NY CORP) JAG JAGUAR COMMUNICATIONS, INC. OWATONNA, MN JAN JANIO TELECOM SERVICES INC. JAMAICA, NY JAS JOLIET TELEPHONE ANSWERING SERVICE JOLIET, IL JAT JATO COMMUNICATIONS ENGLEWOOD, CO JBC JEBCOM INC CAMBRIDGE, OH JBH JAMES B HARRINGTON ALBUQUERQUE, NM JBM JIM BOB MEASURES RADIOFONE-MOBILFONE JBO J B OPERATORS, INC. ABILENE, TX JBS JOPLIN BEEPERS PURDY, MO JCA JCA, INC DBA PHONESENSE HOUSTON, TX JCB JACKSON COUNTY BROADCASTING SVC INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–99 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location JCC JAMES C. CHANDLER DBA PEOPLES TELEPHONE COMPANY ERIN, TN JCP J C PENNEY CO INC NEW YORK, NY JCR JOLIET CELLULAR TELEPHONE CO PLEASANTVILLE, NJ JCS JARVIS COMMUNICATIONS SERVICES OF VA INC JCT JAMES CASS TELEPHONE INDUSTRY CONSULTANT VICTORIA, TX JCU JTC COMMUNICATIONS, INC. LOUISVILLE, KY JCV COMCAST CABLEVISION OF VIRGINIA, INC (PREV JONES COMM OF VA ALEXANDRIA, VA INC) JCZ JAMES C. CRENSHAW COMMUNICATIONS, INC. DENISON, TX JDS JD SERVICES, INC. SLC, UT JDT J & D TRUNKING GREENVILLE, MS JEI JAR ELECTRONICS INC HOUSTON, TX JET JETCOM, INC. DAVIE, FL JGE J G EASLEY CO TULSA, OK JHN JOHNSON TELEPHONES JIL J I L COMMUNICATIONS INC CAMDEN, NJ JJJ LCI INTERNATIONAL (PREV CHARTER CORP) LOUISVILLE, KY JJS J & J SYSTEMS INC ABILENE, TX JKC JK COMMUNICATIONS JKM J & K COMMUNICATIONS INC VICTORIA, TX JKN J & K COMMUNICATIONS, INC. COLUMBIA CITY, IN JLA J F LOCKETT ASSOCIATES STAMFORD, TX JLC JLC SERVICES INC DBA MEGA PAGE BAYAMON, PR JLD JUSTICE LONG DISTANCE CORP. EL SEGUNDO, CA JLW JONES LIGHTWAVE LTD ENGLEWOOD, CO JMF JOPLIN MOBILFONE JMP JACKSON MOBILPHONE COMPANY INC JMR JERRY’S MOBILE RADIO REPAIR SHASTA, CA JMS JMS SYLVANIA, OH JMT JMP TECH MOUNTAIN VIEW, CA JNC JUNCTION COMMUNICATIONS, INC. WILTON, IA JNE J NET COMMUNICATIONS FORT SMITH, AR JNG JENNINGS MOBILFONE JNT EQUALNET CORPORATION (PREV SOUTHWEST LONG DISTANCE FORT SMITH, AR NETWORK-J NET JPB JC PENNEY BUSINESS SERVICES DALLAS, TX JPL JOPLIN MOBILFONE SERVICE INC JOPLIN, MO JPM JAMESTOWN PAGING & MOBILE TEL JQN JACQUE NICHOLS VANCOUVER, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–100 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location JRE J & R ELECTRONICS IRON MOUNTAIN, MI JRL WORLDCOM INC (PREV JARTEL INC) SAN DIEGO, CA JRW JESSE R. WHEELER DBA EXPRESS CHECK CASHING JACKSON, TN JSC JEFFERSON STATE COMMUNICATIONS MEDFORD, OR JSE SWANSON, JAMES E. DBA J S ELECTRONICS MENOMINEE, MI JSK JSM NET LINK, LLC SHEBOYGAN FALS, WI JSL JSL/TOLL MANAGEMENT SYSTEMS INC JSM JSM TELE-PAGE INC. SHEBOYAN FALLS, WI JSN JAS NETWORKS, INC. BATTLE CREEK, MI JST JOHNSTON COMMUNICATIONS SNYDER, OK JTA JOINES TEL ANS & RADIO COMMUNICATIONS JTC JOSEPH THAL AND COMPANY NEW YORK, NY JTM JAPAN TELECOM AMERICA, INC NEW YORK, NY JUB JUBILEE TELECOM, L.L.C. UPPER SADDLE RIVER, NJ JUN JUICE NETWORKS INC SAN DIEGO, CA JUS JUSTICE TECHNOLOGY CORP. CULVER CITY, CA JVS JARVIS COMMUNICATONS OF SOUTH CAROLINA CHARLESTON, SC JVT JILAPUHN, INC. DBA VI-TELCO COLLEGE PARK, GA JWC J&W COMMUNICATIONS JWM JIM WILHITE DBA MOBILCOM OF HEREFORD JWT JWT PARTNERSHIP II SEATTLE, WA JWY JIM WYNN INC WILBURTON, OK KAC KAC COMMUNICATIONS COMPANY EAST ORANGE, NJ KAH KANCHARLA CORPORATION HUNTSVILLE, AL KAL KALAMA TELEPHONE CO KALAMA, WA KAP KAPLAN TELEPHONE COMPANY KAPLAN, LA KAS KANKAKEE TELEPHONE ANSWERING SERV INC KANKAKEE, IL KAT KEYART COMM., INC. KEYSTONE, NE KAY KAYLA COMMUNICATIONS, INC. CHICAGO, IL KBC KVET BROADCASTING DBA CONSTANT COMMUNICATIONS KBR KEARBY’S RADIO SHOP WALNUT RIDGE, AR KBT KBTN IRVING, TX KBY KIRBY COMMUNICATIONS INTERNATIONAL INC HOUSTON, TX KCC KCC COMMUNICATIONS NEW YORK, NY KCE ACKLEY CARIBBEAN ENTERPRISES, INC. ST THOMAS, VI KCF KANSAS CITY FIBERNET KANSAS CITY, MO KCI KCI LONG DISTANCE INC. (SUB OF KELHOURN COMMUNICATIONS INC) SYRACUSE, MY KCL KCC TELCOM, INC. DBA K2C TELCOM KERVILLE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–101 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location KCM KING COMMUNICATIONS KCO KPMG CONSULTING, LLC. LIBERTY CORNER, NJ KCR KEY-COMM INTERNATIONAL, INC. HOUSTON, TX KCS KCOMMUNICATIONS KCT KERN COUNTY TELECOM LTD BAKERSFIELD, CA KCU KELLEY COMMUNICATION KDC KIDD’S COMMUNICATIONS INC KDL KENTUCKY DATA LINK, INC. EVANSVILLE, IN KDT KING’S DEER TELEPHONE COMPANY COLORADO SPRINGS, CO KDW KODIAK WIRELESS PALMER, AK KEC KEY COMMUNICATIONS LLC FT MYERS, FL KEL KINGTEL, INC. FT. LAUDERDALE, FL KEN KENTEC COMMUNICATIONS INC STERLING, CO KER KERTEL COMMUNICATIONS, INC. KERMAN, CA KEY KEYSTONE RESORT KFC KEYSTONE FARMERS COOPERATIVE TELEPHONE COMPANY KEYSTONE, IA KGT KINGDOM TELEPHONE COMPANY AUXVASSE, MO KHN KHN COMMUNICATIONS KHT KNIGHT COMMUNICATIONS, INC. PHOENIX, AZ KIL CATSKILLS COMMUNICATIONS INC. MARGARETVILLE, NY KIN KANSAS INDEPENDENT NETWORKS INC SALINA, KS KIT KITNET, LLC. SALINA, KS KKC KANKAKEE CELLULAR TELEPHONE CO SCHAUMBURG, IL KKL KAR KALL KKM KOKOMO CELLTELCO KANSAS CITY, MO KKU K & K COMMUNICATIONS RAWLINS, WY KLC KAL-COM INC KALKASKA, MI KLD KERRVILLE L D PHONE SERVICE KERRVILLE, TX KLM KLM LONG DISTANCE COMPANY MAITLAND, MO KLP KELLEY’S TELE-COMMUNICATIONS INC PASCO, WA KMC KMC SOUTHEAST CORP. HUNTSVILLE, AL KMK USE IAC CODE KMM DULUTH, GA KMM KMC TELECOM INC (PREV. KAMINE) SUB OF KMC TELECOM HOLDINGS DULUTH, GA INC KMN KASSON & MANTORVILLE TELEPHONE COMPANY KASSON, MN KMP KINGS MESSAGE PLEX COLUMBUS, OH KMR KMAR COMMUNICATIONS, INC. CHESTER, NH KMT USE IAC CODE KMM DULUTH, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–102 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location KNB KNOBVIEW TELEPHONE CO ST JAMES, MO KNC KOTANA COMMUNICATIONS KND KENNEDALE TELCOM KENNEDALE, TX KNE KNET.COM, INC. DBA KNET PRAIRIE VILLAGE, KS KNG KING COMMUNICATIONS INC SAGINAW, MI KNL KANAS TELECOM INC ANCHORAGE, AK KNM KEANE COMMUNICATIONS SIOUX CITY, IA KNN KIN NETWORK INC SALINA, KS KNO KANOKLA COMMUNICATIONS, INC. DBA KANOKLA L.D. ANTHONY, KS KNS KINGS TELEPHONE CO ATLANTA, GA KNT KEN NETWORK INC SALINA, KS KNY COMMONWEALTH OF KENTUCKY LEXINGTON, KY KOC KO COMMUNICATIONS YORKTOWN, IN KOR KOREA TELECOMM SEOUL, KO KOT KOREA TELECOM, INC ROSEDALE, NY KPC K P CONSULTING KPG K-PAGE/ADVANCED VOICE PAGERS A BETTER BEEPER WINFIELD, KS KPN KPN INS INC MANHATTAN, NY KPO KANSAS PERSONAL COMMUNICATION SERVICE, LTD. COUNCIL GROVE, KS KPW K-POWERNET LLC VINITA, OK KRB KRB TELECOM BRANDON, SD KRC KCINDUR COMMUNICATIONS INC DBA ADVANCED PAGING SANTA MARIA, CA KRF KRAFT COMMUNICATIONS WYLE, TX KRN KEYSTONE REHABILITATION SYSTEMS INDIANA, PA KRO KERO COMMUNICATIONS ARLINGTON, TX KRP DENT REDFORD DBA PAGE-COMM KANASA, KS KRS KENTUCKY RADIO SERVICE KRT KELLEY’S RADIO TELEPHONE KSA AKS, LC CHEROKEE, OK KSC KANSAS 9 CELLULAR LIMITED PARTNERSHIP(NOW WESTERN ROSWELL, GA WIRELESS - PCF) KSF KANSAS 4 CELLULAR LIMITED PARTNERSHIP(NOW WESTERN ROSWELL, GA WIRELESS - PCF) KSG KNOX SERVICE GROUP DENTON, TX KSI K & S INTERNATIONAL COMMUNICATIONS, INC. MIAMI, FL KSL LIBERTY CELLULAR, INC DBA KANSAS CELLULAR SALINA, KS KSN KEYSTONE TELECOMMUNICATIONS INC KSO KING SALMON COMMUNICATIONS, INC KING SALMON, AK KST KEYSTONE TELECOM INC SCRANTON, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–103 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location KSY KEY SYSTEMS CORP ALBANY, NY KTC KENTUCKY TELEPHONE CORP LOUISVILLE, KY KTL K-TEL COMUNICATIONS WICHITA FALLS, TX KTM KISS’N TEL COMMUNICATIONS, INC. BALTIMORE, MD KTN KTNT COMMUNICATIONS KENNEDALE, TX KTO AKRON CANTON CONNECTION, INC. FORMERLY J. HORNING HARTVILLE, OH COMPANY, INC. KTP KITCHEN PRODUCTIONS, INC. DBA TORTOISE COMMUNICATIONS & RIDGECREST, CA PAGING KTS KEN-TEL SERVICE INC ADRIAN, MI KTT KOYOTE TELEPHONE INC COMMERCE, TX KTW K.T.W. INTERNATIONAL CORPORATION UNION, NJ KUL ALLEGAN CELLULAR LP (PREV. KULL CELLULAR) ALLEGAN, MI KVA KIVA TELECOMMUNICATIONS, INC BLOOMINGTON, IN KVT KALEVA TELEPHONE COMPANY KALEVA, MI KWH KAWAHAWI CO AUSTIN, TX KYA KEYSTONE ARTHUR TELEPHONE CO KEYSTONE, NE KYC KYCOM PORTOLA VALLEY, CA KYK KEYSTONE KALLING, INC. PHILADELPHIA, PA KYL KEYSTONE LONG DISTANCE RESTON, VA KYN KEYSTONE NETWORK SERVICE DALLAS, TX KYR ACC OF TENNESSEE LLC (PREV KYLE CELLULAR CORPORATION) MORRISTOWN, TN KYS KEY SERVICE CORP ALBANY, NY KYT KYTEL INTERNATIONAL GROUP INC (PREV KYTEL COMM. GROUP INC) NEW YORK, NY LAA L A AIR SIGNAL CO LOS ANGELES, CA LAC LOS ANGELES CELLULAR TEL CO CITYOF COMMERCE, CA LAD ENTELCO ENTERPRISES INC. (PREV. LADA COMMUNICATIONS) DIAMOND BAR, CA LAE LOCAL ACCESS NETWORK, LLC RICE, MN LAG LAGORIO COMMUNICATIONS MONTECO, CA LAI LANDMARK COMMUNICATIONS INC SANTA ANA, CA LAL LOCAL TELEPHONE DATA SERVICES CORP FAIRFIELD, IA LAM LAMBDA COMMUNICATIONS, INC SAN JUAN, PR LAN LANDMARK INN HOTEL-BEST WESTERN LAO LOUISA COMMUNICATIONS, L.C. MORNING SUN, IA LAP LAKE AREA PAGING INC LAR LAR-LIN ENTERPRISES DBA VOICE-TEL LENEXA, KS LAS LEGAL AID SOCIETY OF ORANGE COUNTY SANA ANA, CA LAT TCG (PREV LOCATE TELEPHONE COMPANY) STATEN ISLAND, NY LAU LOUISIANA UNWIRED, INC. CHARLES, LA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–104 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LAW LOCAL LONG DISTANCE, L.C. , DBA LOCAL ALLIANCE NETWORK RINGSTED, IA LAY CLAY COUNTY RURAL TELEPHONE CO-OPERATIVE INC. CLOVERDALE, IN LBA LONG DISTANCE BROKERS OF AMERICA LBC LIBERTY BELL COMMUNICATIONS INC LBH LONG BRANCH CELLULAR TELEPHONE CO LONG BRANCH, NJ LBL LONG DISTANCE BILLING CO LAS VEGAS, NV LBM MICHIGAN 7 CELLULAR LP ROSWELL, GA LBP LIBERTY PAGING SERVICE HELENA, MT LBR LDB OF ROCHESTER ROCHESTER, MN LBT LBC TELEPHONY INC PARSIPPANY, NJ LBU LD BRUCE MILWOUKEE, WI LBY LIBERTY TELEPHONE CORP MESA, AZ LCA LANCASTER ALARM CO INC LCC LINCOM CORP DALLAS, TX LCE LONG-DISTANCE CO (THE) DETROIT, MI LCF USE IAC CODE UTC SAN RAFAEL, CA LCG LEAST COST ROUTING DBA LONG DISTANCE CHARGES SANTA ANA, CA LCH C L T COMMUNICATIONS, INC. CLEAR LAKE, WI LCI WORLDCOM INC. (PREV. LDDS) TULSA, OK LCK LACKAWAXEN TELEPHONE COMPANY ROWLAND, PA LCL LO CALL USA LCM LIGHTHOUSE COMMUNICATIONS INC LCN ALLTEL COMMUNICATIONS HOLDINGS OF THE MIDWEST (PREV WILLISTON, VT LINCOLN COMM. LCO LEACO RURAL TELEPHONE COOPERATIVE INC LOVINGTON, NM LCP LAWRENCE CARPHONE LCQ C & L COMMUNICATIONS INC SAN ANTONIO, TX LCR LANCASTER RADIO PAGING CORP LCS LAYNE COMMUNICATIONS INC NEW YORK, NY LCT LECTRONICS INC LCU LDC TELECOMMUNICATIONS INC. TAMPA, FL LCW CITIWISE COMMUNICATIONS, L.L.C. SOUTH ORANGE, NJ LCX L C COMMUNICATIONS MIAMI, FL LCY LITCHFIELD COUNTY CELLULAR, INC. LEXINGTON, KY LCZ LCI BRANDON, SD LDA LDS ALEXANDRIA ALEXANDRIA, LA LDB POPP TELCOM (PREV. LDB CORP) MINNEAPOLIS, MN LDC ONE-2-ONE COMMUNICATIONS(PREV AMERICAN TELECOM PHOENIX, AZ NETWORK, INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–105 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LDD WORLDCOM INC. (PREV. LDDS) TULSA, OK LDE LONG DISTANCE EXCHANGE LDH LONG DISTANCE AMERICA HEMET NEWPORT BEACH, CA LDI LDX INC(NOW LEXITEL) LDJ LD TELECOMMUNICATIONS, INC. MIAMI, FL LDL WORLDCOM INC. (PREV. LDDS) TULSA, OK LDM LONG DISTANCE MANAGEMENT PADUCAH, KY LDN LONG DISTANCE NETWORK LDO LONG DISTANCE OPERATORS INC SPRINGFIELD, MO LDP LESTER D PLOUGH DBA PLOUGH’S RADIO SERVICE LDQ L D NETWORK INC YORBAS LINDA, CA LDR LDS OF BATON ROUGE MONROE, LA LDS WORLDCOM INC. (PREV. LDDS) TULSA, OK LDT LONG DISTANCE TELEPHONE COMPANY LDU USE IAC CODE UTC LDV 800 & LONG DISTANCE SERVICES BALTIMORE, MD LDW LONG DISTANCE SERVICE OF WASHINGTON WASHINGTON, DC LDX LDX TELECOM INC LDY LDCC INC. SPRINGFIELD, MO LDZ LONG DISTANCE TELEPHONE CORP LEWISTON, ME LEA CLEAR WORLD COMMUNICATIONS CORP SANTA ANA, CA LEB TELECUBA INC MIAMI, FL LEC LE CARD, LTD. D/B/A INTERNATIONAL AUDIOTEXT SERVICES EATONTOWN, NJ LED LEGENDS COMMUNICATIONS, INC ATLANTA, GA LEE LEE ELECTRONICS HERCULES, CA LEF LOCAL EXCHANGE CARRIERS OF MICHIGAN INC GRAND RAPIDS, MI LEG CALTEL LONG DISTANCE COPPEROPOLIS, CA LEH LEE HARBOR HOMES LEHIGH ACRES, FL LEL LITELCO COMMUNICATIONS INC OCEANSIDE, NY LEM LAURENS MUNICIPAL COMMUNICATIONS UTILITY DAKOTA DUNES, SD LEN ALLENDALE TELEPHONE COMAPANY ALLENDALE, MI LEO ALTERNATIVE TELEPHONE CONNECTIONS, INC. FT WORTH, TX LEP LOCAL TELEPHONE SERVICES, CO. (KS) JUNCTION CITY, KS LER LINEAR COMMUNICATIONS CORPORATION CORONADO, CA LES LETT ELECTRONICS LET WTG-CENTRAL INC (NOW WILTEL - WTL) CHESTERFLD, MO LEU LEE’S COMMUNICATIONS, LLC INDIANAPOLIS, IN LEV LEVY ASSOCIATES INC. BROOKLYN, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–106 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LEX LEXITEL CORP LFB LOS BANOS TELECOMMUNICATIONS FRESNO, CA LFG LAFAYETTE OF GLENDIVE LFM LAFAYETTE OF MILES CITY LFN LIGHTSPEED FIBER NETWORK, LLC BRIARCLIFF MANOR, NY LFR LOCAL FIBER L.L.C. LONG ISLAND CITY, NY LFS LOCAL FONE SERVICE, INC. ARLINGTON, TX LFT LENFEST TELEPHONY, INC. OAKS, PA LFY LAFAYETTE RADIO TELEPHINE CO WEST LAFAYETTE, IN LGA TALLGRASS COMMUNICATIONS INC. CHICAGO, IL LGB LIN GUARD BAND INC LGC LONG DISTANCE CHARGES, INC. SANTA ANA, CA LGD LONG DISTANCE DISCOUNT INC CAPE GIRARDE, MO LGE LEADING EDGE ENTERPRISES, INC. ATLANTA, GA LGF LONG DISTANCE INTERNATIONAL INC. FORT LAUDERDALE, FL LGG LOOKING GLASS NETWORKS, INC. ADDISON, TX LGH LIGHTEL INC WILLOWDALE, ON LGI LEGACY LONG DISTANCE INTERNATIONAL, INC. LONG BEACH, CA LGK LIGHT LINK, INC DBA TEX-LINK COMMUNICATIONS, INC. (PREV SAN ANTONIO, TX LGL LANGLEY TELECOMMUNICATIONS DALLAS, TX LGM LONG DISTANCE MANAGEMENT OKLAHOMA CITY, OK LGN LONG DISTANCE ASSISTANCE PLANO, TX LGO LOG ON AMERICA, INC. PROVIDENCE, RI LGP ALEXANDER GROUP TELECOMMUNICATIONS MANHATTAN, NY LGR LONG DISTANCE DIRECT INC. PEARL RIVER, NY LGS USE IAC CODE LGF FORT LAUDERDALE, FL LGT LCI INTERNATIONAL (SUB OF QWEST COMMUNICATIONS INTERNATL. WORTHINGTON, OH INC) LGU LIGHTSOURCE TELECOM I, LLC TOLEDO, OH LGV LIGHTBONDING.COM VA INC. CHANTILLY, VA LGW LOCAL GATEWAY EXCHANGE, INC DALLAS, TX LGX LEGENT COMMUNICATIONS CORPORATION IRVINE, CA LHC LITCALL WORTHINGTON, OH LHD LAUREL HIGHLAND TELEPHONE COMPANY STAHLSTOWN, PA LHG LAFAYETTE CITY - PARISH CONSOLIDATED GOVERNMENT LAFAYETTE, LA LHH LENOX HILL HOSPITAL NEW YORK, NY LHL LAUREL HIGHLAND LONG DISTANCE COMPANY STAHLSTOWN, PA LHM LHM INC FALLS CHRUCH, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–107 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LHR LAKE HURON CELLULAR CORP CARO, MI LHS LOCAL TELCOM HOLDINS, LLC. DBA TRANSPOINT COMMUNICATIONS CALABASAS, CA LHT ALLEGHENY HYPERION TELECOMMUNICATIONS L.L.C. BRIDGEVILLE, PA LIA ALLIANCE DATA SYSTEMS, INC. DALLAS, TX LIB LIBERTY COMMUNICATIONS LIC CLARIONIP.COM ATLANTA, GA LID LIGHTSPEED TELECOM, LLC SALEM, IL LIE ALPINE-MICHIGAN E, INC. GAYLORD, MI LIF ALPINE-MICHIGAN F, LLC. GAYLORD, MI LIG LIGTEL COMMUNICATIONS, INC LIGONIER, IN LIH LIGHTBONDING.COM INC. CHANTILLY, VA LII COMPULINE INTERNATIONAL, INC. STATEN ISLAND, NY LIL LIGHTCOM INTERNATIONAL WASHINGTON, DC LIN LIN COMMUNICATIONS INC LIO LIBOTEL INC. ST LIBOIRE, QC LIP LIP CORP LAKEWOOD, NJ LIS LDI SOLUTIONS, INC. SAN FRANCISCO, CA LIT L I TEL CO COMMUNICATIONS INC LIV LISCO INDUSTRIES INC (VA KY COMMUNICATIONS) NORTON, VA LJS LJSS GENERAL CORPORATION CHICAGO, IL LKC LCC (PREV LUFKIN-CONROE TELECOMMUNICATIONS CORP) LUFKIN, TX LKD LAKEDALE LINK, INC. ANNANDALE, MN LKF LAKEFIELD COMMUNICATIONS, INC. NEWTON, WI LKG TALKINGNETS HOLDINGS, LLC. WILMINGTON, NC LKH LINK TECH CORPORATION SANTURCE, PR LKM LAKE MOBILE PHONE INC OSAGE, MO LKN LINKNET JACKSON, MS LKP LINKATEL PACIFIC SANTA ANA, CA LKR LAKER TELECOMMUNICATIONS CORPORATION ANDOVER, NJ LKS LAKE STATES COMMUNICATIONS MADISON, WI LKT LINKATEL OF CALIFORNIA, L.P. SAN DIEGO, CA LKW T-ZAK WIRELESS, INC DBA TALK NOW USA N CHARLESTON, SC LLA LOCAL LINE AMERICA, INC. CUYAHOGA FALLS, OH LLC LAVALLE LONG DISTANCE, INC. LAVALLE, WI LLD LEC LONG DISTANCE, INC. BALLWIN, MO LLE CALL SCIENCES, INC EDISON, NJ LLG CLARKS TELECOM LONG DISTANCE CO. CLARKS, NE LLI LONG LINE INC SIOUX FALLS, SD

Proprietary — Licensed Material See proprietary restrictions on title page. 9–108 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LLK LEC-LINK ANTIOCH, TN LLL LONG ISLAND LONG DISTANCE RONKONKOMA, NY LLM CALLMANGE INC STAMFORD, CT LLN LONG LINE SERVICES INC BAKERSFIELD, CA LLO ALLSTATE COMMUNICATIONS, INC. CHATSWORTH, CA LLR ALLIED RISER OF ILLINOIS, INC. WASHINGTON, DC LLS L&L SERVICE INC LLT LAKELAND TELECOM, INC. LUCK, WI LLU CALDWELL COMMUNICATION INC ALBUQUERQUE, NM LLV LOCAL TELECOM SERVICE, LLC FT WORTH, TX LLZ ALL TELECOMMUNICATIONS, INC. MINEOLA, NY LMA ALMA TELEPHONE COMPANY INC ALMA, GA LMB LA MOVIDA BEEPERS COMMUNICATION LOS ANGELES, CA LMC L M COMMUNICATIONS INC WILMER, MN LMD ALMA LONG DISTANCE, L.L.C ALMA, MO LMF LEBANON MOBILEFONE INC LMG LMG TELEPHONE, INC. SANTA BARBARA, CA LMH LEEMAH ELECTRONICS SAN FRANCISCO LMI LONG DISTANCE OF MICHIGAN INC DBA LDMI TELECOMMUNICATIONS HAMTRAMCK, MI LMK LANDMARK COMMUNICATIONS CO INC LAWRENCE, KS LML LIONHART OF MIAMI INC DBA ASTRAL COMMUNICATIONS MIAMI, FL LMM LOGOS COMMUNICATIONS, INC. WESTLAKE, OH LMN LDS MONROE MONROE, LA LMO LGM COMMUNICATIONS, INC. BRIDGEPORT, CT LMP LEBANON MOBILE PHONE INC LMR LAMAR COMMUNICATIONS SYSTEMS INC LAMAR, MO LMS LDM SYSTEMS, INC. NEW CITY, NY LMT CLIMAX TELEPHONE COMPANY CLIMAX, MI LMU LAMAR COUNTY CELLULAR INC PARIS, TX LNA TELENOVA COMMUNICATIONS MIAMI, FL LNC LEBANON COUNTY CELLULAR INC LANDOVER, MD LND LANDLINE CORP HOFFMAN ESTATES, IL LNE LOST NATION - ELWOOD TELEPHONE COMPANY LOST NATION, IA LNG LONG DISTANCE SERVICE LNH LONG DISTANCE NORTH OF NORTH HAMPSHIRE MANCHESTER, NH LNI ALLIANCE NETWORK INC NEW ORLEANS, LA LNK LINKUSA CEDER RAPIDS, IA LNL CAL-NORTH CELLULAR YREKA, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–109 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LNN LONGNET LNO EQUALNET CORPORATION (PREV U S NETWORK) RICHARDSON, TX LNP CELLULAR NETWORK PARTNERSHIP KINGFISHER, OK LNR TELSTAR INTERNATIONAL INC WHITE PLAINS, NY LNS ALLTEL SYSTEMS OF THE MIDWEST, INC. (PREV ALIANT SYSTEMS INC) LINCOLN, NE LNT LIGHTNET INC (NOW WILTEL - WTL) NEW HAVEN, CT LNV LINCOLNVILLE COMMUNICATIONS, INC. LINCOLNVILLE, ME LNW CLARITY TELECOM LOCAL NETWORK SERVICES, INC. MILFORD, CT LOA AT&T (LOCAL) BASING RIDGE, NJ LOC LOCUS FORT LEE, NJ LOE ALLEGHENY COMMUNICATIONS CONNECT, INC. GREENSBURG, PA LOG HOTEL CONNECT, L.L.C. (PREV LONG DISTANCE TRANSFER, INC.) DALLAS, TX LOH LONG DISTANCE OHIO PORTSMOUNTH, OH LOI LORAL ORION, INC. ROCKVILLE, MD LOJ COMPUTER 5*, INC. DBA LOCALTEL EAST WENATHEE, WA LOK CALL-O-CALL INC NEW YORK, NY LOL LOTELCO, INC. EDMOND, OK LOM LOMA INTERNATIONAL COMMUNICATIONS INC CAGUAS, PR LON LINEONE TAMPA, FL LOO LINK TWO CORPORATION HOUSTON, TX LOP CLEARPOP INC. WILMINGTON, DE LOR LERMER OVERSEAS TELECOMMUNICATIONS INC BRONX, NY LOS EQUALNET CORPORATION (PREV LONG DISTANCE NETWORK INC0 RICHARDSON, TX LOT LO-TEL COMLER LOU LOUISIANA 8 CORPORATION NEW YORK, NY LOW LOCAL COMMUNICATIONS NETWORK, INC. STERLING, VA LPA LESIE HAMMOND-PHONE AMERICA GUYMAN, OK LPC LA REPUBLICA COMMUNICATIONS, INC. NORTH BRUNSWICK, NJ LPE ALLPAGE, INC SAVANNAH, GA LPG LANG PAGING INC LPH LENNON TELEPHONE CO. LENNON, MI LPI LATAMNAP. INC. HOMESTEAD, FL LPL ALAMOSA PCS LLC LUBBOCK, TX LPM LOCAL ACCESS PRIME,LLC CENTRALIA, WA LPN ALPINE NETWORK SERVICES, L.C. DES MOINES, IA LPO TELUPTON 2000 INC. UPTON, CN LPP APPLECOM LTD ISLANDIA, NY LPQ CLEVELAND PCS LLC INDEPENDENCE, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–110 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LPR LONG DISTANCE OPERATOR CO LUBBOCK, TX LPS LARKIN PUBLICATIONS CHESTNUT HL, MA LPT LOADPOINT LLC BRENTWOOD, TN LPV LOCAL PHONE SERVICES, INC. WICHITA, KS LRC L.R. COMMUNICATIONS, INC. LEAF RIVER, IL LRD LEON’S RADIO INC OKLAHOMA CITY, OK LRE LORAIN ELECTRONICS CORP DALLAS, TX LRF CLARK FORK TELECOMMUNICATIONS, INC. MISSOULA, MT LRG LEAST COST ROUTING, INC. CLEARWATER, FL LRI CLEAR RATE COMMUNICATIONS INC OAK PARK, MI LRK CLARKS TELECOMMUNICATIONS CLARKS, NE LRL CLEARTALK GRAND JUNCTION, CO LRM LINEDRIVE COMMUNICATIONS MORRISVILLE, NC LRN LE-RU LONG DISTANCE COMPANY STELLA, MO LRO LTS OF ROCKY MOUNT, LLC ROCKY MOUNT, NC LRP LUBBOCK RADIO PAGING INC LRS CLOSECALL AMERICA, INC CHESTER, MD LRT LORAINE TELECOM CORP DALLAS, TX LRU LE-RU TELEPHONE COMPANY STELLA, MO LRW CLEARWORKS.NET, INC. HOUSTON, TX LRY LIBERTY TELECOM LLC RENO, NV LSA CREDIT LOANS, INC. D/B/A LONE STAR COMMUNICATIONS CONROE, TX LSC USE IAC CODE DTC SOUTHFIELD, MI LSD LONG ISLAND TELEPHONE COMPANY UNIONDALE, NY LSE CEO TELECOMM, INC. (SUB OF STAR TELE.) (PREV L D SERVICES INC) SANTA FE SPRINGS, CA LSH LDS OF SHREVEPORT SHREVEPORT, LA LSI INTERMEDIA COMMUNICATIONS INC (PREV LONG DISTANCE SAVERS TAMPA, FL INC) LSJ LSSI CORP EDISON, NJ LSK ALASKA TELEPHONE CO. TOK, AK LSL LONG DISTANCE SATELLITE FRAZIER, PA LSM LASER COMMUNICATION HEMET, CA LSN LOWRANCE SOUND & COMMUNICATIONS UNION CITY, TN LSO LIGHT SPEED OPERATORS KENNEDALE, TX LSP BROADWING TELECOMMUNICATIONS INC (PREV CINCINNATI BELL CINCINNATI, OH LONG DIST) LSR LONG DISTANCE SEARCY SEARCY, AR LSS CELLULAR TECHNOLOGY INC (PREV LSS CELLULAR LUBBOCK) LUBBOCK, TX LST LONE STAR TELECOM SAN ANTONIO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–111 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LSU LISTING SERVICES SOLUTIONS, INCORPORATED LUMBERTON, NJ LSV CLS SERVICES INC. INDEPENDENCE, OH LSX LS-ONE, INC. JACKSON, MS LSY WORLDCOM INC. (PREV. LDDS) TULSA, OK LSZ LONE STAR CELLULAR INC PLEASANTON, CA LTA LAVERENE’S TELEPHONE ANSWERING SERVICE LTC LAWTON COMMUNICATIONS LTD LEXCOM LONG DISTANCE, INC. LEXINGTON, NC LTE STAR TEL, INC. (PREV. LUFKIN TELECOMMUNICATIONS INC.) BRYAN, TX LTG LUCENT TECHNOLOGIES CANADA MARKHAM, ON LTH LIGHTRADE WASHINGTON, DC LTI LANSER TELECOM INC. WESTMOUNT, PQ LTK LTK ENGINEERING INC PHILADELPHIA, PA LTL LCI INTERNATIONAL (PREV LITEL/LCI INTERNATIONAL) WORTHINGTON, OH LTM L D C TELECOMMUNICATIONS HIALEAH, FL LTN LONDON TELECOM NETWORK INC OAKVILLE, ON LTO CCL TELECOMMUNICATIONS, INC. CEDAR KNOLLS, NJ LTP LIGHTSHIP TELECOM, L.L.C. NASHUA, NH LTQ LTS INC JOPLIN, MO LTR LOCAL TELEPHONE SERVICE COMPANY HOUSTON, TX LTS LONG DISTANCE TELEPHONE SAVERS INC LTT ALLTEL COMMUNICATIONS NEBRASKA INC(PREV LINCOLN TELE & OMAHA, NE TELEGRAPH) LTU LDS OF TULSA TULSA, OK LTV LITCO TELECOMMUNICATIONS COMPANY NEW YORK, NY LTW LOUISVILLE TWO-WAY RADIO SVC INC LTX LAR-TEX CELLULAR TELEPHONE CO LAREDO, TX LTY LIBERTY BELL TELEPHONE CO INC SEATTLE, WA LTZ LTT CELLULAR LINCOLN, NE LUA LINQ UP AMERICA NORTHRIDGE, CA LUB 800-777-CLUB, INC. EL MONTE, CA LUC LUCRE, INC GRAND RAPIDS, MI LUE CLEARSOURCE, INC. AUSTIN, TX LUL CORECOMM (PREV OCOM LONG DISTANCE & CELLULAR LONG WORTHINGTON, OH DISTANCE) LUM LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. KAPLAN, LA LUN CLEC COMMUNICATIONS CORP PEAR RIVER, NY LUR ADIR INTERNATIONAL EXPORT, LTD DBA LA CURACAO LOS ANGELES, CA LUS ARCH LONG DISTANCE (PREV LOTUS COMM CORP) HOUSTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–112 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location LUT ALL-COMMUNICATIONS COVINGTON, KY LUW XSPEDIUS CORP (PREV LEC UNWIRED LLC) LAKE CHARLES, LA LVA LAVACA TELEPHONE CO. LAVACA, AR LVC LEVEL 3 COMMUNICATIONS, LLC LISLE, IL LVL TELEPHONE BILLING SERVICES, INC. (PREV. LONG DISTANCE HENDERSON, NV BILLING) LVM LEHIGH VALLEY MOBILE TELE CO LVN LT&T VVN OPERATIONS LINCOLN, NE LVO LIVE OAK TELECOM CEDAR PARK, TX LVP LEHIGH VALLEY PAGE ALLENTOWN, PA LVR LVT CORP CAMP DOUGLAS, WI LVT LEHIGH VALLEY TELECOM INC LVU TALK VISUAL CORPORATION MIAMI, FL LVW LOUISVILLE LIGHTWAVE; ALSO- DBA LEXINGTON LIGHTWAVE LOUISVILLE, KY LWC BUSINESS TELECOM INC (PREV LASSMAN WEBER COMM) MEDFORD, OR LWD LA WARD CELLULAR LA WARD, TX LWG WHO EVER (PREV. LUDWIG) KENNEDALE, TX LWH LONG DISTANCE WHOLESALE CLUB (EXCEL COMMUNICATIONS) WASHINGTON, DC LWK NETWORK TELEPHONE CORPORATION (PREV LIGHTNETWORKS, INC.) PENSACOLA, FL LWN LIVE WIRE NETWORKS, INC. DENVER, CO LWR LAWRENCE MOBILPHONE LAWRENCE, KS LWS LEWIS COMMUNICATIONS WYLE, TX LWV LIGHTWAVE COMMUNICATIONS, LLC LAUREL, MD LWX LACKAWAXEN LONG DISTANCE COMPANY ROWLAND, PA LXC THE LEAST EXPENSIVE CORP GARDEN CITY, NY LXO LEXCOM TELEPHONE COMPANY LEXINGTON, NC LXS THE TEXAS LONE STAR NETWORK AUSTIN, TX LYA LINE SYSTEMS, INC. BROOMAL, PA LYC ACCESS PLUS PAGING INC DBA ALL CITY CALL WAUKESHA, WI LYF LAYER 4 TECHNOLOGIES INC JERSEY CITY, NJ LYN LYNCH INTERACTIVE CORPORATION (PREV LYNCH CORPORATION) GREENWICH, CT LYO LAYERONE INC DALLAS, TX LYS LYNK SYSTEMS, INC. ATLANTA, GA MAA 3M CANADA, INC. LONDON, ON MAB MID-AMERICA BCSTG CHARLOTTE, MI MAC MR AUSTIN A CALDWELL MAD FRONTIER COMMUNICATIONS OF THE MID ATLANTIC, INC. ROCHESTER, NY MAE MAC-TEL SPRINGFIELD, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–113 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MAF AFN COMMUNICATIONS, LLC (PREV AMERICA’S FIBER NETWORK, TULSA, OK LLC.) MAG MAGCARD SERVICES INC TUSCON, AZ MAH MICROPATH ALBERQUERQUE, NM MAI BROOKS FIBER COMMUNICATIONS OF TEXAS, INC(PREV METRO IRVING, TX ACCESS) MAJ MID-IOWA TELEPHONE CO-OP ASSOCIATION GILMAN, IA MAK MID MAINE TELECOM BANGOR, ME MAL WORLDCOM INC. (PREV. LDDS) TULSA, OK MAM MO-ARK MOBILEPHONE INC MAN MANCHESTER MOBILEPHONE MAO MAT-TELL COMMUNICATIONS, INC. MIAMI BEACH, FL MAP MCI AIRSIGNAL OF PHILA PA INC MAQ MACTEL, INC ANCHORAGE, AK MAR MARMON TELEPHONE NETWORK MAS MCI AIRSIGNAL INC CHICAGO, IL MAT MATRIX ASSOCIATES INC MAU MEDIA COMMUNICATIONS OF AUSTIN AUSTIN, TX MAV MID ATLANTIC TELECOM OF VIRGINIA RICHMOND, VA MAW MCI AIRSIGNAL INC (WILMINGTON) MAX MAX-TEL COMMUNICATIONS, INC. ALVOUD, TX MAY MAY DEPARTMENT STORES CO ST LOUIS, MO MAZ METAGRAM AMERICA INC PLANO, TX MBA MOBILE COMMUNICATIONS CORPORATION OF AMERICA MBB MIDWEST WIRELESS COMMUNICATIONS, L.L.C. MANKATO, MN MBC MOBILECOMM SCHAUMBURG, IL MBD CAMBRIDGE TELCOM SERVICES, INC GENESEO, IL MBE MOBILE COMMUNICATION SERVICE INC MEADVILLE, PA MBF MOBILEFONE MBG MOBILPAGE COMMUNICATIONS PORT ANGELES, WA MBH MOBILE PHONES & PAGING GOLDEN, CO MBI MOBIL-TEL NETWORK ENCINO, CA MBJ MR BEEPER INC SAN JUAN, PR MBK MELLON BANK NA PITTSBURGH, PA MBL MOBILE RADIOTELEPHONE & PAGING MBM MT BEACON MOBILE TELEPHONE INC MBN MOBILECOMM - A BELLSOUTH CO - ENGLEWOOD ENGLEWOOD, NJ MBO MOBIL OIL CREDIT CORP KANSAS CITY, MS MBP MO-BILPAGE INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–114 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MBQ MOBILECOMM - A BELLSOUTH CO RIDGELAND, MS MBR MUSKOGEE BEEPERS MBS MOBILE RADIO SYSTEMS OF SAN JOSE MBT MOBILE TELEPHONE INC MBU MELBOURNE INTERNATIONAL COMMUNICATIONS LTD PALM BAY, FL MBV MOBILE RADIO SYSTEMS OF VENTURA MBW MOBILE TELEPHONE SERVICE OF WHEELING WHEELING, WV MBX MOBILE TELECOMMUNICATION TECHNOLOGIES JACKSON, MS MBY USE IAC CODE MXN WINENPEG, CN MBZ MOBILE TELENET CORP HOUSTON, TX MCA MOBILE COMMUNICATIONS OF AMERICA MCB AIR TOUCH PAGING, INC (PREV MESSAGE CENTER BEEPERS) EAST HARTFORD, CT MCC MCCA OF TENNESSEE MCD MCCORD COMMUNICATION SERVICE INC MCE MC CAW CELLULAR ONE OK CITY, OK MCF MULTI CALL UNIVERSAL FT LAUDERDALE, FL MCG MCI (PREV. MCI TELECOMMUNICATIONS CORP - PACIFIC DIV) RICHARDSON, TX MCH MOBILE PHONE OF CHARLESTON MCI MCI TELECOMMUNICATIONS RICHMOND, VA MCJ MCI TELECOMMUNICATIONS CORP - SOUTH WEST ST LOUIS, MO MCK MCI (PREV MCI TELECOMMUNICATIONS CORP - SOUTH EAST) RICHARDSON, TX MCL MESSAGE CENTRAL MCM MOBILE COMMUNICATIONS INC MCN MC CAIN COMMUNICATION MCO MORRIS COMMUNICATIONS INC MCP METROCALL OF PA MCQ MC CAW COMMUNICATIONS FRESNO, CA MCR MESSAGE CENTER MCS MOBILE COMMUNICATIONS SERVICES INC MCT MESSAGE CENTER INC BURLINGTON, VT MCU MODERN COMMUNICATIONS CORP MCV MONTANA CELLULAR TELEPHONE CO MISSOULA, MT MCW MC CAW TELECOMMUNICATIONS MCX MCI INTERNATIONAL MCY WORLDCOM, INC(PREV MERSURY LONG DISTANCE) MCZ AT&T WIRELESS SERVICES, INC.(PREV. MCCAW CELLULAR COMM. INC) KIRKLAND, WA MDA MID ATLANTIC TELECOM MC LEAN, VA MDB MEDICAL DENTAL BUREAU INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–115 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MDC MODERN COMMUNICATIONS ALTOONA, PA MDD MARSHALL LDDS MARSHALL, MN MDE MEADE ASSOCIATES PHILADELPHIA, PA MDF MEDIA 4 OAK BROOK, IL MDG MOORE DATA MANAGEMENT SERVICES DIVISION MINNEAPOLIS, MN MDH MERIDIAN TELECOM CORPORATION WOODSTOCK, GA MDI METRO ONE TELECOMMUNICATIONS, INC (PREV METRO ONE DIRECT BEAVERTON, OR INFO) MDJ MEDICAID DENVER, CO MDK MTA LONG DISTANCE, INC. WASILLA, AK MDL MIDCOM OF TUCSON TUCSON, AZ MDM MERCED TELECOM FRESNO, CA MDN MID ATLANTIC COMMUNIICATIONS INC (INVALID) OWNINGS MILS, MD MDO I DON’T CARE (PREV. MELROSE LONG DISTANCE OPERATOR) AUSTIN, TX MDP MOBILE DISPATCHING SERVICE MDQ MODERN COMMUNICATIONS CORP ALTOONA, PA MDR MADERA RADIO DISPATCH MDS MOBAPHONE DISPATCH SERVICE CO MDT MID-TOWN COMMUNICATIONS MDU MIDCO COMMUNICATIONS SIOUX FALLS, SD MDV MOBILCOM OF MEADVILLE MEADVILLE, PA MDW CCC COMMUNICATIONS CORP (PREV MIDWEST TELEPHONE SERVICE) CAPE CORAL, FL MDX MID-TEX CELLULAR SAN ANGELO, TX MDY MAYDAY USA INC HOUSTON, TX MDZ MID TEL LD INC WILLISTON, ND MEA MERIMAC TELECOMMUNICATIONS CORP APPLETON, WI MEB METRO BEEPER INC SAN JUAN, PR MEC WORLDCOM INC. (PREV. LDDS) TULSA, OK MED MED ATLANTIC TELEPHONE GREENSBORO, NC MEE MOMENTUM TELECOM MILL VALLEY, CA MEF METRO FIBERLINK, INC. BOCA RATON, FL MEG METROPAGE NORMAL, IL MEH THE MARNE AND ELK HORN TELEPHONE COMPANY DES MOINES, IA MEI MERCURY COMMUNICATIONS, INC. WILLISTON PARK, NY MEJ METSTREAM COMMUNICATIONS, INC. BEAVERTON, OR MEK MERETEL COMMUNICATIONS LLP GONZALES, LA MEL MATEWAN ELECTRICAL SERVICE MATEWAN, WV MEM MOBILECOMM RIDGELAND, MS

Proprietary — Licensed Material See proprietary restrictions on title page. 9–116 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MEN ONVOY, INC, PREV (MEANS TELCOM) PLYMOUTH, MN MEO METRO TELECOM INC MARIETTA, GA MEP METROMEDIA PAGING SERVICES AUSTIN, TX MEQ MINNESOTA EQUAL ACCESS SERVICES INC EDEN PAIRIE, MN MER MID AMERICAN TECHNOLOGIES INC OMAHA, NE MES MOBILPHONE EXCHANGE OF SANDUSKY INC MET METRO ELETRONICS TELECOM SYSTEMS LTD MEU MET COMMUNICATIONS, INC. APOLLO BEACH, FL MEV MEGSINET-CLEC, INC. CHICAGO, IL MEW MIDWEST TOWERS, INC. EAST GRAND FORKS, MN MEX MESSAGE EXPRESS COMPANY DELTON, MI MEY MUNICIPAL ELECTRIC AUTHORITY OF GEORGIA ATLANTA, GA MEZ MTE, INC LANGLEY PARK, MD MFA MAYFIELD ANSWERING SERVICE MFB MEMBERS FINANCIAL SERVICE BUREAU (THE) PHOENIX, AZ MFC MOBILEFONE COMMUNICATIONS INC MFD MFS DATANET, INC. SAN JOSE, CA MFE MOBILFONE OF ERIE INC ERIE, PA MFF MEG RADIO, INC NEWARK, NJ MFG METROCALL/FIRST PAGE MOUNT LAUREL, NJ MFH MEDCOM OF RALEIGH RALEIGH, NC MFI MIDWEST FIBERNET INC MATTOON, IL MFK MOBILFONE OF KANSAS MFL MASTERFILES INC INFORMATION SERVICES DALLAS, TX MFM AMTEL, LLC. BAKERSFIELD, CA MFN METRO FONE COMMUNICATIONS INC MFO MOBILFONE INC MFP METROCOMM FIBER OPTIC NETWORK COLUMBUS, OH MFR MARIETTA FIBERNET MARIETTA, GA MFS MOBILFONE SERVICES INC MFT MIDWEST TELCOM COMPANY (MICHIGAN) WARREN, MI MFU AMAFLA TELECOM, INC. MIAMI, FL MFV MFG SERVICES, INC. SANTA FE, NM MFW METROMEDIA FIBER NETWORK, INC NEW YORK, NY MFX MFN COMMUNICATIONS DALLAS, TX MFY AMERICAN FIBER SYSTEMS, INC. ROCHESTER, NY MFZ WORLDCOM TECHNOLOGIES (PREV MFS INTELENET, INC.) OMAHA, NE MGA METAGRAM AMERICA INC CHICAGO, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–117 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MGB AMERITECH GLOBAL GATEWAY SERVICES, INC. CHICAGO, IL MGC MEGACOMM CORP DAVENPORT, IA MGD MANAGEMENT DATA SERVICES MGE MCGEE COMMUNICATIONS ELECTRONICS INC STOCKTON, CA MGF MONMOUTH TELEPHONE AND TELEGRAPH INC RED BANK, NJ MGG MICHIGAN MESSAGE CENTER KALAMAZOO, MI MGH AMPS CELLULAR OF CHICAGO, INC. SCHAUMBURG, IL MGI MID-STATE PAGING, INC. TRENTON, NJ MGJ MGW NETWORKS, L.L.C. WILLIAMSVILLE, VA MGK MEGA COMM LLC ROSELLE, NJ MGL THE MILLENNIUM GROUP TELEMANAGEMENT CORPORATION BROOKFIELD, WI MGM CMG TELECOMMUNICATIONS, INC NASHUA, NH MGN MANAGED NETWORK SYSTEMS INC. WINDSOR, ON MGO MATAGORDA TWO-WAY BAY CITY, TX MGP MARMON GROUP INC LOMBARD, IL MGQ MEGACLEC, INC. FALL RIVER, MA MGR MATGRIN MGS MORNINGSTAR COMMUNICATIONS, INC. DUNCANVILLE, TX MGT MEGA-TEL CELLULAR III EDEN PRARIE, MN MGU MAGUIRE ELECTRONICS CARDONDALE, PA MGV MUSTANG COMMUNICATIONS CORPORATION HECTOR, MN MGW MEGAWATS SAN FRANCISCO, CA MGX MEGATEL CORPORATION ENGLEWOOD, NJ MGY MMT GORI, INC. MONONGAHELA, PA MGZ MAGAZINE TELEPHONE COMPANY MAGAZINE, AR MHA MPA-MOBILE PHONE ANSWERING SERVICE DUMAS, TX MHB MILES COMMUNICATIONS INC DBA ENHANCED SUNMAN, IN TELECOMMUNICATIONS CORP MHC MONMOUTH CELLULAR ONE FREEHOLD, NJ MHD MITCHELL LD SERVICE DALLAS, TX MHE METRO TELEPHONE INC PEORIA, IL MHF MAINE TELEPHONE COMPANY STANDISH, ME MHG MULTITECHNOLOGY SERVICES, L.P. RICHARDSON, TX MHH AMERICAN PHONE CORPORATION SARASOTA, FL MHI MICHTEL, INC. FARMINGTON, MI MHK MESCALERO APACHE TELECOM, INC. MESCALERO, NM MHL MINH LONG DISTANCE FORT WORTH, TX MHM MAHAFFEY MESSAGE RELAY INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–118 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MHN MARATHON TELECOMMUNICATIONS CORP VANCOUVER, BC, CN MHO METROPHONE LTD. HOUSTON, TX MHP USE IAC CODE COC DALLAS, TX MHQ MEMPHIS NETWORK LLC MEMPHIS, TN MHR M.R. COMMUNICATIONS, INC SPRINGFIELD, MO MHS MH COMMUNICATIONS, INC. MOUNT HOREB, WI MHT MAHATTAN CABLE TV INC NEW YORK, NY MHU CAMACHO COMMUNICATIONS CORPORATION SACRAMENTO, CA MHV AMPS CELLULAR OF ILLINOIS, INC. SCHAUMBURG, IL MHW MOBILEPHONE OF HUMBOLDT, INC. EUREKA, CA MHX MH TELECOM, INC. MOUNT HOREB, WI MHY MARITIME TELEGRAPH AND TELEPHONE COMPANY, LIMITED HALIFAX, CN MHZ MARATHON COMMUNICATIONS INC SEATTLE, WA MIA MID-AMERICAN COMMUNICATIONS CORP MIB MICHIGAN BELL TELEPHONE CO DETROIT, MI MIC WORLDCOM INC. (PREV. LDDS) TULSA, OK MID MIDCO-TEL SIOUX FALLS, SD MIE METRO MOBILE WALLINGFORD, CT MIF AMERICAN CONSULTANTS ALLIANCE, INC. LOUISVILLE, KY MIG MINIMUM RATE PRICING INCORPORATED BLOOMFIELD, NJ MIH MID-HUDSON COMMUNICATIONS, INC. CATSKILL, NY MII MICRO-COMM TELECOMMUNICATIONS MOBILE, AL MIJ AMERICA LONG DISTANCE, INC. DENVER, CO MIK MID-AMERICAN TELEPHONE COMPANY EASTPOINTE, MI MIL MILLI COM INC RALEIGH, NC MIM MIMA INC MIN MINTELCO LDS INC BRAINERD, MN MIO MICRONESIAN TELECOMMUNICATIONS CORPORATION SAIPAN, CMWL N MARIANAS, NN MIP MID-MAINE TELPLUS DBA MID-MAINE LONG DISTANCE BANGOR, ME MIQ MOUNDRIDGE TELCOM, INC. MOUNDRIDGE, KS MIR MINERICH INC RICHMOND, KY MIS MIDWEST COMMUNICATIONS INC GRAND ISLAND, ME MIT USE IAC CODE MID MIU MISSOURI LOTTERY JEFFERSON CITY, MO MIV MADISON RIVER COMMUN. LLC (PREV MEBTEL INTEGRATED COM. MEBANE, NC SOLUTIONS) MIW GREAT LAKES COMNET, INC (PREV MICHIGAN INDEPENDENT OKEMOS, MI NETWORK, INC.)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–119 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MIX MOUNTAIN TELECOMMUNICATIONS, INC. TUCSON, AZ MIY MIE TELECOM, INC. FT WAYNE, IN MIZ MID SEA DBA MIDCOM COMMUNICATIONS INC. SEATTLE, WA MJA MIDSTATE TELECOM, INC. KIMBALL, SD MJC SPRINT SPECTRUM L.P. (PREV. MAJORCO, L.P.) KANSAS CITY, MO MJD FAIRPOINT COMMUNICATIONS SOLUTIONS CORP (FAIRPOINT COMM. CHATHAM, NY CORP) MJE MC WIRELESS, INC. SAN ANTONIO, TX MJI MOSSEL JAMAICA LIMITED KINGSTON, JM MJJ AMERICAN PREPAID TELEPHONE SERVICE, LLC MARIETTA, GA MJL MOLALLA TELEPHONE COMPANY MOLALLA, OR MJM METRICOM, INC. BURR RIDGE, IL MJN MOUNTAINET TELEPHONE COMPANY GATE CITY, VA MJO AMERICAN MONEY CORPORATION INDIANAPOLIS, IN MJS MARCUS COMMUNICATIONS, LLC MANCHESTER, CT MJT MARCATEL INTERNATIONAL LLC MCALLEN, TX MJV MCBLUE TELECOM, INC. WESTLAKE VILLAGE, CA MJW METRO DISPATCH INC. GRAND FORKS, ND MJZ MAW COMMUNICATIONS, INC. FLEETWOOD, PA MKA MARK TWAIN LONG DISTANCE, INC (PREV MARK TWAIN COMMUN HUROLAND, MO COMPANY MKB MARK TWAIN LONG DISTANCE, INC. HURDLAND, MO MKC MOBILTALK CELLULAR INC FORT MYERS BEACH, FL MKD MERIDIAN TELECOM, INC. KISSIMMEE, FL MKE ALEC, INC (PREV METROLINK INTERNET SERVICES OF PORT STLUCIE MELBOURNE, FL INC) MKI MISSOURI NETWORK ALLIANCE, LLC KANSAS CITY, MO MKK M.L.M. TELECOMMUNICATIONS, INC. HOT SPRINGS, AR MKL MASKATEL INC STE ROSALIE, PQ MKM MERCURY TELECOM (USA) INC NEWARK, NJ MKN USE IAC CODE HWC FREDERICK, MD MKO MILLENNIUM OPTICAL NETWORKS NORTH AMERICA, INC. NEW YORK, NY MKR AMERICAN NETWORK SERVICES, INC. MT. VERNON, NY MKS MAIN STREET MEDIA BEVERLY HILLS, CA MKT MILWAUKEE TELEPHONE CO. DBA CELLULAR ONE AND CELLULAR1/ WAUKESKO, WI E.WISCONSI MKU AMTEL COMMUNICATIONS, INC. JACKSON, MS MKV MCKEEVER COMMUNICATIONS INC DECATUR, IL MKW MARKETASIAN NETWORK, INC. STANTON, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–120 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MKY MOBEX NETWORK SERVICES COMPANY NEWPORT BEACH, CA MKZ MOCK’S 2-WAY RADIO STUTTGART, AK MLA MIDLAND COMMUNICATIONS CORP MIDLAND, TX MLB MOBILCOMM OF LONGBEACH LONGBEACH, CA MLC MOBILE COMMUNICATIONS CORP OF AMERICA MLD METRONET LONG DISTANCE COMMUNICATIONS INC HOLP, MI MLE MID ATLANTIC TELEPHONE GREENSBORO, NC MLF MANAWA TELECOM, INC. 131 2ND STREET, WI MLG WORLDCOM INC. (PREV. LDDS) TULSA, OK MLH MICRO LIGHT COMMUNICATIONS INC ALBUQUERQUE, NM MLI MULTI COMPUTER SYSTEMS INC ADDISON, IL MLJ MILLENNIUM TELCOM, L.L.C. DBA ONE SOURCE COMMUNICATIONS DENISON, TX MLK METRO-LINK TELECOM TEXAS CITY, TX MLL MCI CELLCOM CELLULAR MLM MILLICOM TELECOMMUNICATIONS SERVICES INC NEW YORK, NY MLN MAINLINE COMMUNICATIONS MLO MESCELLCO COMMUNICATIONS INC JACKSON, MS MLP MERRILL LYNCH PIERCE FENNER & SMITH INC NEW YORK, NY MLQ MONTEL COMMUNICATIONS INC MONROEVILLE, AL MLR MOBILE RADIO COMMUNICATIONS SERVICE MLS USE IAC CODE IOR DES MOINES, IA MLT MOBILE RADIO TELEPHONE SERVICE MLU MERETEL COMMUNICATIONS, L.P. DALLAS, TX MLV MONTANA LEGAL SERVICES ASSOCIATION HELENA, MT MLW MERCHANT-LINK INC VIENNA, VA MLX MULTIMEDIA LONG DISTANCE COMPANY ATLANTA, GA MLY MTC TELEMANAGEMENT CORPORATION PETALUMA, CA MLZ MCLANG CELLULAR INC POTOMAC, MD MMA MM ANSWERING SERVICE INC MMB MITCHELL MOBILE TELEPHONE MMC MARIETTA MARINE COMMUNICATIONS MMD METROMEDIA PAGING SERVICES SCHAUMBURG, IL MME MID-MISSOURI CELLULAR SEDALIA, MO MMF MILLEDGEVILLE MOBILEFONE INC MMG MTI MANAGEMENT LTD FT WAYNE, IN MMH MAMMOTH CELLULAR INC SAN FRANCISCO, CA MMI TOUCH AMERICA, INC (PREV TELECOMMUNICATIONS RESOURCES BUTTE, MT INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–121 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MMJ METCOM INCORPORATED PLAINVIEW, NV MMK METAMORA TELEPHONE COMPANY METAMORA, IL MML MOBILEFONE NORTHWEST (MOSSES LAKE) MMM MID-MO MOBILFONE MMN NORTH DAKOTA NETWORK CO DBA SRT WIRELESS (PREV SOURIS MINOT, ND RIVER TELE) MMO METRO MOBILE CHARLOTTE, NC MMP MARATHON MOBILE PHONE MMQ MARTIN MARIETTA INFORMATION & COMMUNICATIONS SYSTEMS CHANTILLY, VA MMR MINNESOTA MOBILE RADIO INC MMS MARINETTE-MENOMINEE LDS MARINETTE, WI MMT MASS CONNECTICUT MOBILE TELEPHONE CO MMU MULTI-CHANNEL SYSTEMS, INC. ADDISON, TX MMV MOBILECOMM OF MOUNTIANVIEW MOUNTAINVIEW, CA MMW MCCA MICROWAVE GARDEN GROVE, CA MMX MEDICINE MAN PAGING CLARKSVILLE, AR MMY ZIMMER WAY FORT WORTH, TX MMZ METRO MOBILE CTS NEW YORK, NY MNA MONTANA POWER CO BUTTE, MT MNB MULTIBAND COMMUNICATIONS INC Bozeman, MT MNC MINNESOTA COMMUNICATIONS MND MONAD FEDERAL CREDIT UNION MNE MAIN CELLULAR PORTLAND, ME MNF MADISON COUNTY TEL. CO. INC. HUTSVILLE, AR MNG MUSTANG TELECOM INC HOUSTON, TX MNH MENDELSSOHN GROUP KENNEDALE, TX MNI MICRONET INC JAMINSON, PA MNJ MON-CRE TELEPHONE COOPERTIVE, INC. RAMER, AL MNK MADISON NETWORK SYSTEMS, INC HAMEL, IL MNL MOBILEFONE NORTHWEST (LEWISTON) MNM MID-CONTINENT COMMUNICATIONS EDMOND, OK MNN MINNESOTA MOBILE TELEPHONE MNO AT&T CANADA, INC. (PREV METRONET COMMUNICATIONS CORP) TORONTO, ON MNP MOBILEFONE NORTHWEST PASCO MNQ MONTANA TEL-NET LOLO, MT MNR MONROE RADIOTELEPHONE MNS MOBILEFONE NORTHWEST (SPOKANE) MNT MARINE TELEPHONE COMPANY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–122 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MNU MCMANUS COMMUNICATIONS BLYTHEVILLE, AR MNV MIRACLE COMMUNICATIONS FORT WORTH, TX MNW MOBILFONE NORTHWEST INC MNX MOUNTAIN COMMUNICATIONS INC. PUEBLO, CO MNY MOBILEFONE NORTHWEST YAKIMA MNZ MON-CRE WIRELESS, INC. DBA MON-CRE LONG DISTANCE RAMER, AL MOA METRO OF ATHENS INC MOB MOBILCOM MOBILE COMMUNICATION SERVICE MEADVILLE, PA MOC METROCOMM INC COLUMBUS, OH MOD MODULAR DATA INC EL MONTE, CA MOE METROPHONE PHILADELPHIA, PA MOF MOUNTAINET, INC. GATE CITY, VA MOG MOBILPAGE INC ST JOSEPH, MO MOH ENGLISH DAVID DBA MOBILE COMMUNICATIONS SERVICES TYLER, TX MOI GRANDE COMMUNICATIONS NETWORKS, INC (PREV THRIFTY CALL, SAN MARCOS, TX INC) MOJ MARTELL TELECOM, INC DBA TRI-STATE LONG DISTANCE GLENNS FERRY, ID MOK MOBILE PHONE OF OKLAHOMA LAWTON, OK MOL METRO OF LAUREL MOM MIDCOM INC BISMARCK, ND MON METRO ONE ROCHELLE PARK, NJ MOO MASSENA TELEPHONE COMPANY MASSENA, IA MOP MOBILE - PAGING COMMUNICATIONS MADISON, SD MOQ TRANSBEAM, INC (PREV MEDIA LOG, INC) NEW YORK, NY MOR MOTOROLA COMMUNICATIONS AND ELECTRONICS INC SAN DIEGO, CA MOS METRO ONE TELECOMMUNICATIONS BEAVERTON, OR MOT MONTANA LONG DISTANCE INC BILLINGS, MT MOU MOUNTAINEER CELLULAR GENERAL PARTNERSHIP HINDMAN, KY MOV MADISON RIVER LONG DISTANCE SOLUTIONS, INC CHAPEL HILL, NC MOW MONTANA WIRELESS, INC. MISSOULA, MT MOX MASTER CALL COMMUNICATIONS, INC. NEW YORK, NY MOY MTCO COMMUNICATIONS, INC METAMORA, IL MOZ MOBILE ELECTRONICS INC WICHITA, KS MPA METRO-PAGE OF AZ MPB MOBILPHONE AND BEEPER INC MPC METRO-PAGE OF COLUMBUS INC MPD MICAL PROPERTIES INC YONKERS, NY MPE MOBILE PARTNERS CORP. BRONX, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–123 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MPF MAINSTREAM PCS, LLC. BERWYN, PA MPG MADISON PAGING MPH MOBILEPHONE SYSTEMS MPI MOBILEMEDIA COMMUNICATION, INC.(PREV. METROMEDIA PAGING ST LOUIS, MO SERVICES) MPJ MINNESOTA POWER TELECOM INC DULUTH, MN MPK THE MARSEILLES TELEPHONE COMPANY OF MARSEILLES ILLINOIS METAMORA, IL MPL METROPOLITAN FIBER SYSTEMS OF CHICAGO INC OAKBROOK TERRACE, IL MPM METROPOLITAN MOBILE TELEPHONE CO CHICAGO, IL MPN MOBILEFONE NORTHWEST SPOKANE, WA MPO MUSTANG OPERATORS DALLAS, TX MPP MOBILEMEDIA PAGING AND PERSONAL/COM SERVICES COLUMBIA, MD MPQ CHORUS NETWORKS INC (PREV MID-PLAINS LONG DISTANCE) MIDDLETON, WI MPR MOBILPHONE PAGING RADIO MPS MISSOURI PAGING SERVICES INC MPT MOBILE PHONE OF TEXAS INC MPU MCI AIRSIGNAL OF PITTSBURGH PA INC MPV MOBILEFONE OF NORTHEASTERN PENNSYLVANIA INC MPW MOBILE PHONE WEST MPX MAP MOBILE COMMUNICATIONS INC. PHOENIX, AZ MPY MTEL LONG DISTANCE INC MILLINGTON, TN MPZ MPC BUSINESS COMMUNICATION SYSTEMS INC/EASTON TELECOM POMPANO BEACH, FL SERVICES MQA MARQUETTE-ADAMS TELEPHONE COOPERATIVE, INC. OXFORD, WI MQB MOBILETEL LAROSE, LA MQC METRO CONNECTION INC DENTON, TX MQD MERCEDNET, INC. MERCED, CA MQE MOHEGAN TELECOMMUNICATIONS, LLC. UNCASVILLE, CT MQI COMMUNICATIONS OPTIONS INC COLUMBUS, OH MQL METROTEL DENTON, TX MQM MULTIPHONE LATIN AMERICA, INC. MIAMI, FL MQP METACOMM CELLULAR PARTNERS WAYNE, NJ MQR MABEL CELLULAR, INC. MABEL, MN MQS METROPCS INC. WALNUT CREEK, CA MQT METRO CONNECTION INC DENTON, TX MQU MICOR COMMUNICATIONS, INC. TUCKER, GA MQV MOUNDVILLE TELEPHONE COMPANY MOUNDVILLE, AL MQW MEGAWORLD HACKENSACK, NJ MRA MCI/RSA INC ROSWELL, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–124 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MRB CAMARATO DISTRIBUTING, INC HERRIN, IL MRC MOBILE RADIO COMMUNICATIONS INC KANSAS CITY, MO MRD MESSAGES BY RADIO INC MRE TAYLOR, JAMES DBA METROTEL TEXARKANA, TX MRF MEIER-FRANK CO PORTLAND, OR MRG MINNESOTA REGIONAL NETWORK MINNEAPOLIS, MN MRH MARVIN RHEINBOLDT TV & COMMUNICATIONS MRI METRO RADIO PHONE MRJ AMERICAN COMMUNICATION SYSTEMS LITTLETON, CO MRK M-K TECHNOLOGIES BOISE, ID MRL METROLINE INC POTTSBORO, TX MRM MOBILE RADIO MESSAGE SERVICE INC MRN MARINETTE RADIO PAGING SERVICES MRO MOBILE RADIO COMMUNICATIONS SERVICES INC MRP MITCHELL RADIO PAGING MRQ MICHIGAN 6 CELLULAR LP ROSWELL, GA MRR MORAINE RADIO WEST BEND, WI MRS M T SYSTEM OF MN INC (NOW WESTERN WIRELESS CORP. - PCF) MRT MARINE RADIO TELEPHONY CO INC MRU METROTIME COMMUNICATIONS FT. WORTH, TX MRV MID-RIVERS TELEPHONE CO-OP, INC GLENDIVE, MT MRW METRO RADIO PHONE OF WISCONSIN MRX MUNSON RADIO GREAT FALLS, MT MRY MERCURY COMMUNICATIONS COMPANY JACKSON, MS MRZ METROCALL, INC ALEXANDRIA, VA MSA MOBILECOMM OF SAN ANTONIO SAN ANTONIO, TX MSB MOBILE COMMUNICATIONS SVC. OF BOWLING GREEN, INC. BOWLING GREEN, KY MSC MID-SOUTH COMMUNICATIONS MSD MASTERCARD INTERNATIONAL ST LOUIS, MA MSE MID-STATE ELECTRONICS WENATCHEE, WA MSF MISSOURI TELECOM, INC. ALIQUIPPA, PA MSG MCI AIR-SIGNAL OF INDIANA INC MSH MARSCH COMMUNICATIONS MANAGEMENT (NOW TMC COMM -TMZ) VENTURA, CA MSI MSI TELECOMMUNICATIONS BROOKVILLE, FL MSJ M & L ENTERPRISES, INC. MIDVALE, ID MSK ONVOY, INC. (PREV MEANS COMMUNICATIONS CORPORATION) PLYMOUTH, MN MSL MARSHALL COMMUNICATIONS CORP MSM MARCOM SYSTEMS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–125 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MSN TDS METROCOM, INC(PREV MADISON CLEC CORPORATION) CHICAGO, IL MSO MINNESOTA SOUTHERN CELLULAR TELEPHONE CO MANKATO, MN MSP MOUNTAIN MESSAGE & PAGER SERVICE INC GRAND JUNCTION, CO MSQ MISSOURI CELLULAR LIMITED PARTNERSHIP(NOW WESTERN ROSWELL, GA WIRELESS-PCF) MSR MT SHASTA RADIO TELEPHONE MSS MID-STATE SYSTEMS INC MST MCI AIRSIGNAL TELECOMMUNICATIONS INC MSU MOBILE TELEPHONE OF SOUTHERN UTAH MSV METRO COMMUNICATIONS SERVICES MSW USE IAC CODE BNY SCHAUMBURG, IL MSX MSN COMMUNICATIONS, INC. CARESBAD, CA MSY MORGAN STANLEY AND COMPANY NEW YORK, NY MSZ MASTER CORP DALLAS, TX MTA METRO AMERICA COMMUNICATIONS ATLANTA, GA MTB TELAMARKETING COMMUNICATIONS OF MONTEREY BAY INC MONTEREY, CA (INVALID) MTC MOBILE TELECOMMUNICATIONS MTD WORLDCOM INC. (PREV. LDDS) TULSA, OK MTE METROTEC MTF METROPOLITAN FIBER SYSTEMS INC NEW YORK, NY MTG METROMEDIA PAGING SERVICES ENGLEWOOD CLIFFS, NJ MTH MORTECH INDUSTRIES WOODSTOCK, GA MTI MOUNTAIN TELECOMMUNICATIONS INC MTJ MOBILE FONE OF JACKSON HOLE INC MTK MOBIL TALK INC MTL MC CAW TELEPAGE MTM METER MASTER DENVER, CO MTN MOBILE TELEPHONE COMPANY OF NJ MTO MOTELCO INC MTP MOBILE TELEPHONE AND PAGER INC KAMUELA, HI MTQ MTS-TAMPA INC TAMPA, FL MTR MOTOR INN INC MTS M T SYSTEMS INC MTT METROTEC INC MTU MOUNTAIN COMMUNICATIONS INC AVON, CO MTV MANHATTAN TELECOMM. CORP DBA METROPOLITAN TELECOMM. NEW YORK, NY MTW MUSKOGEE TWO-WAY MTX NETROCELL CELLULAR TEL CO (NAME CHG METROPLEX TELECOM)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–126 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MTY MILITARY COMMUNICATIONS CENTER INC EDEN PRAIRIE, MN MTZ MANITWOC LONG DISTANCE SERVICE MANITWOC, WI MUA METRO AREA USERS ASSOC FREMONT, NE MUB MILLENNIUM ONE COMMUNICATIONS, INC. ARLINGTON, TX MUC MULTICON TELECOM NETWORK INC DALLAS, TX MUD USE IAC CODE MFF NEWARK, NJ MUE CARIBBEAN TELECOMMUNICATIONS CONSORTIUM, INC(PREV SAN FRANCISCO, CA MULTIMEDIA) MUF MOBILE U.H.F. INC GARDEN GROVE, CA MUG MTC COMMUNICATIONS, INC. COLCHESTER, IL MUH MUTH COMMUNICATIONS MITCHELL, SD MUI MAUI CELLULAR TELEPHONE CO KIRKLAND, WA MUJ MOUNTAIN RURAL TELEPHONE COOPERATIVE CORPORATION, INC WEST LIBERTY, KY MUK MOMENTUM BUSINESS SOLUTIONS, INC. BIRMINGHAM, AL MUL MULTI-CALL MUM USE IAC CODE EWC MORGANTOWN, WV MUN MOUNTAIN MOBILE COMMUNICATIONS REDDING, CA MUO MANUEL TELCOM WYLE, TX MUP MOUNTAIN PAGING NETWORK INC KALIPSELL, MT MUQ MAINSTREET COMMUNICATIONS, LLC SAUK CENTRE, MN MUR LDDS SULPHUR, LA MUS MUSTANG COMMUNICATIONS DENVER, CO MUT MUTUAL SIGNAL CORPORATION SAN FRANCISCO, CA MUU MICROSUN TELECOMMUNICATIONS, INC. FT. LAUDERDALE, FL MUV MOUNTAIN SOLUTIONS, LTD LAKEWOOD, CO MUW MULTICOMM COMMUNICATION TOWERS WILLIAMSBURG, PA MUX MUTUAL INFORMATION EXCHANGE, INC. GRAND RAPIDS, MI MUY MERCURY INC SUPLHUR, LA MUZ MELROSE COMMUNICATIONS, INC MELROSE, MN MVA MICROVOICE MINNEAPOLIS, MN MVC MOUNT VIEW COMMUNICATIONS INC MVD MIDWEST VOICE AND DATA NETWORKS, LLC. MADISON, WI MVE MAVERIX.NET, INC. CHICAGO, IL MVG MIDVALE TELEPHONE EXCHANGE INC MIDVALE, ID MVH MOUNTAIN VIEW TELEPHONE COMPANY MOUNTAIN VIEW, AR MVI MONTANA ADVANCED INFORMATION NETWORK, INC. FAIRFIELD, MT MVL MID-RIVERS LONG DISTANCE, INC. CIRCLE, MT MVM M & M COMMUNICATIONS, INC. STEVENS POINT, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–127 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MVN COMPETITIVE COMMUNICATIONS INC RIVERSIDE, CA MVO HARCOURT TELCO, LLC DBA MAVERIX.NET (PREV MAVERIX.COM, INC) CHICAGO, IL MVP MADISON RIVER TELEPHONE CO MEBANE, NC MVR MIAMI VALLEY RADIOTELEPHONE MVS MOVIE, TELEVISION, & GRAPHICS CORP. DBA M.T.G. MIAMI, FL MVT MCV TELCOM ARLINGTON, TX MVU MANNING MUNICIPAL COMMUNICATIONS & TELEVISION SYSTEMS MANNING, IA UTILITY MVV TMC OF VIRGINIA, INC. BETHESDA, MD MVW MOUNTAINVIEW COMMUNICATIONS, INC. RANDOM LAKE, WI MVX MVX COMMUNICATIONS LLC SAN MATEO, CA MWA MATHEWS ANS SERVICE MWB AMERICAN CELLULAR WIRELESS LAWRENCEVILLE, GA MWC METRO WORLD COMMUNICATIONS INC MWD METROWIDE INTERNATIONAL COMMUNICATIONS REXDALE, ON MWE MIDWEST MOBILE COMMUNICATION WINNER, SD MWF MWU FIBERCOM ST LOUIS, MO MWG M P W PAGING CARROLLTON, GA MWH MAC WIRELESS, L.L.C. CASCADE, IA MWI MOBILECOMM OF WISCONSIN INC MILWAUKEE, WI MWJ MISSION NETWORKS, LLC. TRAVERSE CITY, MI MWK MOBILPHONE OF WESTERN KANSAS DIGMTON, KS MWL MARPLE-NEWTOWN TELEPHONE ANSWERING SERVICE NEWTOWN SQUARE, PA MWM MIDWEST MOBILE MWN MCGRAW COMMUNICATIONS, INC. NEW YORK, NY MWO MID-IOWA LONG DISTANCE, INC. GILMAN, IA MWP MILLENNIUM WIRELESS GROUP, INC. WOODBURG, NY MWQ MOUNTAIN WEST LONG DISTANCE ORANGEVILLE, UT MWR MIDWESTERN RELAY SUB OF MRC TELECOMMUNICATIONS INC MILWAUKEE, WI MWS MIDWEST TELECOM CHICAGO, IL MWT COAST TO COAST TELECOMMUNICATIONS CLARKSTON, MI MWU MIDWESTERN TELECOMMUNICATIONS, INCORPORATED CHICAGO, IL MWV TELIGENT SERVICES, INC. (PREV TELIGENT INC. ) VIENNA, VA MWW MOBILEFONE NORTHWEST WALLA WALLA MWX MBO WIRELESS EARLSBORO, OK MWY MIDWEST TELECOM OF AMERICA, INC MERRILLVILLE, IN MWZ AT&T WIRELESS SERVICES, INC. (PREV. MCCAW COMMUNICATIONS- KIRKLAND, WA MSI DIV) MXA AMERIMEX COMMUNICATIONS CORP. ROSWELL, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–128 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MXC MIDDLESEX CELLULAR MIDDLESEX, NJ MXD MOUNTAINET LONG DISTANCE, INC. GATE CITY, VA MXE MAXCESS, INC. NEWBERRY, FL MXH MATRIX DATACOM INC. DBA MXD COLLEGE STATION, TX MXI MAXXIS COMMUNICATIONS, INC TUCKER, GA MXK MAXLINK COMMUNICATIONS INC TORONTO, ON MXL MAXTEL CORPORATION HARRISON, NJ MXM METRO-COM, INC. OMAHA, NE MXN MTS COMMUNICATIONS, INC. (PREV MTS NETCOM, INC.) WINNIPRG, MB MXO METRO TELECONNECT, INC. GAITHERSBURG, MD MXP TMP CORPORATION GOLDEN, IL MXR MAXCOM INCORPORATED AURORA, CO MXS MICROCELL CONNEXIONS, INC. MONTREAL, PQ MXT MATRIX TELECOM FORT WORTH, TX MXU TMEX USA, INC. NEW PORT BEACH, CA MXW MIDDLETOWN TELECOM INC MARLTON, NJ MXX MTX COMMUNICATIONS CORP NEW YORK, NY MXY COMMUNICATION TECHNOLOGY INC MIAMI, FL MXZ MOBILE TELETALK TEXAS 4 BRISCOE INC CHARLOTTESVILLE, VA MYA MOBILE RELAY ASSOCIATES INC PARAMOUNT, CA MYC MACYS CALIFORNIA INC SAN FRANCISCO, CA MYD MCDONALD COUNTY LONG DISTANCE COMPANY PINEVILLE, MO MYE MAHORNEY ELECTRONIC PAGING BUENA VISTA, CO MYG MCG, LLC. COCONUT GROVE, FL MYH MARTEL COMMUNICATIONS DBA MARIANNA-SCENERY HILL LONG MARIANNA, PA DISTANCE CO. MYI MERCURY MESSAGE PAGING, INC. RIVERDALE, MD MYK MERCURY CELLULAR OF KANSAS, INC. LAKE CHARLES, LA MYL MCELROY ELECTRONICS CORPORATION SHIRLEY, MA MYM MY-COMM INC EUGENE, OR MYN MONROE TELEPHONE COMPANY MONROE, OR MYO MILLRY COMMUNICATION, INC. MILLRY, AL MYP MOULTRIE INDEPENDENT TELEPHONE COMPANY LOVINGTON, IL MYR MILLRY TELEPHONE COMPANY, INC. MILLRY, AL MYS MARYLANDERS AGAINST YOUTH SUICIDE BROOKLANDVILLE, MD MYT MULTIMEDIA HYPERION TELECOMMUNICATIONS WICHITA, KS MYU MID CENTURY TELEPHONE CO-OPERATIVE CANTON, IL MYV MULBERRY TELECOMMUNICATIONS, INC. MULBERRY, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–129 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location MYW MEDICAL SOCIETY OF SEDGWICK COUNTY WICHITA, KS MYX MASERGY COMMUNICATIONS INC IRVING, TX MYY TELEPHONE MILOT MOBILITE INC. PAULIN, CN MZA AM-TEL, INC. GAINESVILLE, GA MZC MONARCH COMMUNICATIONS COEUR’D ALENE, ID MZD MCD TELECOMMUNICATIONS, INC. DBA TELECOM MCD DALLAS, TX MZF METROPCS CALIFORNIA/FLORIDA, INC. SUNRISE, FL MZG METROPCS GEORGIA, INC. DUNWOODY, GA MZI MGW LONG DISTANCE, L.L.C. WILLIAMSVILLE, VA MZL VARTEC TELECOM, INC (PREV METROTEL LONG DISTANCE) LANCASTER, TX MZM METROMAIL CORP LOMBARD, IL MZO MEZCO, LLC. ADAMS, MA MZP METROMEDIA PAGING RIDGEFIELD PARK, NJ MZS MOBIUS COMMUNICATIONS COMPANY HEMINGFORD, NE MZT MOTOROLA INC FORT WORTH, TX MZU MOUNTAIN WEST INTERNET, INC. MISSOULA, MT MZW MAINSTREAM COMMUNICATIONS, LLC DBA MAINSTREAM NEW MEDIA CORAL GABLES, FL MZY MYRIAD DEVELOPMENT INC (WHOLLY OWNED SUB OF MYRIAD DATA, AUSTIN, TX INC.) MZZ MASCOMM, LLC TARZANA, CA NAA NORTH AMERICAN TELECOMMUNICATIONS CORP UNIONDALE, NY NAB NORTH AMERICAN DATA SYSTEMS INC. ATLANTIC BEACH, FL NAC TELEBEAM, INC (PREV NORTH AMERICAN COMMUNICATIONS, INC) STATE COLLEGE, PA NAD NORTH AMERICAN DIGICOM CORPORATION AURORA, CO NAE NORTH AMERICA TELEPHONE & TELECOMMUNICATIONS CRANFORD, NJ NAF NATEL L.C. FAIRFIELD, IA NAG NORTH AMERICAN COMMUNICATIONS GROUP KANSAS CITY, MO NAH NOAH CORP FORT WAYNE, IN NAI NORTH AMERICAN COMMUNICATIONS CORP KANSAS CITY, MO NAK NATIONAL TELECOM, LLC CROSSVILLE, TN NAL NATIONAL TELEPHONE OF AMERICA NEW YORK, NY NAM NEW AMERICAN PHONE COMPANY NAN NORTH AMERICAN NETWORK VAN COUVER, BC NAO NETWORK ACCESS SOLUTIONS CORP. STERLING, VA NAP NORTH ALABAMA PAGING CO NAQ NORTH ALABAMA CELLULAR ONEONTA, AL NAR NORTHERN ARIZONA COMMUNICATIONS CORP FLAGSTAFF, AZ NAS WORLDCOM INC. (PREV. LDDS) TULSA, OK

Proprietary — Licensed Material See proprietary restrictions on title page. 9–130 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NAT NORTH AMERICAN TELECOM INC NAU NA COMMUNICATIONS, INC ABINGDON, VA NAW NATIONWIDE RSA SERVICE INC VALLEY STREAM, NY NAX NTTA.COM, INC. NEW YORK, NY NAY NORTH AMERICAN TELECOM WESTBURY, NY NBB MCNABB LONG DISTANCE, INC MCNABB, IL NBC NEW BRUNSWICK CELLULAR CLARKSBURG, NJ NBD NBD BANK NA DETROIT, MI NBE NATIONAL BUSINESS EXCHANGE, INC. PASADENA, CA NBI NATIONAL BRANDS INC PHOENIX, AZ NBK NETWORK BROKERS INC IRVING, TX NBO NORTH BY NORTHEASTCOM LLC BEAVERTON, OR NBR THE NEW BRUNSWICK TELEPHONE COMPANY, LIMITED SAINT JOHN, NB NBT ALLTEL COMMUNICATIONS OF NEBRASKA, INC. (PREB NEBRASKA GRAND ISLAND, NE CELLULAR) NBW ANEW BROADBAND, INC. MIAMI, FL NBY CANBY TELEPHONE ASSOCIATION CANBY, OR NBZ NBC INC SAN ANTONIO, TX NCA NTE CENTRAL COAST NCB NOVACOM GLOBAL LLC SANTA MONICA, CA NCC NATIONAL COMMUNICATIONS CO NCD NTCNET TELECOM INC NEWPORT, NY NCE NCHE TELECOMMUNICATIONS NETWORK INC FAIRFAX, VA NCF NETWORK COMMUNICATIONS INTERNATIONAL CORP. LONGVIEW, TX NCG NORTH AMERICAN COLLECTION AGENCY, INCORPORATED EDGEMONT, PA NCH NATIONAL CASH REGISTER NCI NETWORK COMMUNICATIONS NCJ CONDOR COMMUNICATIONS INC. JAMACIA ESTATES, NY NCK NATIONAL COMM LINK, LLC NORTH MIAMI BEACH, FL NCL NET-CAL LANSING, MI NCM NIAGARA COMMUNICATIONS INC NCN NATIONAL COMMUNICATIONS NETWORK NEW YORK, NY NCO NATIONAL COMM CO INC NCP ACC LONG DISTANCE CORP(PREV. NC CORP-PACE) ROCHESTER, NY NCQ NTC INC LIGHTHOUSE POINT, FL NCR NCR TELECOMMUNICATIONS SERVICES INC (NCR-TSI) NCS LCC (PREV NACODOCHES TELECOMMUNICATIONS INC) LUFKIN, TX NCT NOR CAL TELECOM FREEMONT, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–131 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NCU NETWORK COMMUNICATIONS INC SEATTLE, WA NCV NETCARRIER TELECOM, INC. LANSDALE, PA NCW NATIONAL COMTEL NETWORK INC TARZANA, CA NCX NCI COMMUNICATIONS INC LAKEWOOD, NJ NCY NEW CHANNELS - HYPERION TELECOMMUNICATIONS E SYRACUSE, NY NCZ NATIONAL CELLULAR, LLC WALLINGFORD, CT NDA 3620221 CANADA INC ETOBICOKE, ON NDB NTWS DIGITAL BROADBAND, INC. DECATUR, TX NDC NORTHERN DOOR COMMUNICATIONS SISTER BAY, WI NDE NATIONWIDE TELECOM, INC. BURLINGTON, NJ NDG NEW ENGLAND DIGITAL DISTRIBUTION INC BEVERLY, MA NDI NEW DIMENSIONS INDUSTRIES PHOENIX, AZ NDK NORTH DAKOTA TELEPHONE COMPANY DEVILS LAKE, ND NDL NORTH DAKOTA LONG DISTANCE DEVILS LAKE, ND NDM NCI DATA.COM, INC. OMARK, WA NDN NETWORK DIMENSIONS INCORPORATED LONG VALLEY, NJ NDO NTCH-COLORADO INC GRAND JUNCTION, CO NDP NEW DIAL INCORPORATED CHICAGO, IL NDQ 3855651 CANADA INC. STE MARIE DE BEAUCE, QC NDR NATIONAL DIRECTORY ASSISTANCE, LLC. LOUISVILLE, KY NDS NORTHEAST TELEDISCOUNT INC NORWALK, CT NDT NORTHERN TELEPHONE & DATA OSHKOSH, WI NDU NETWORLD CONNECTIONS, INC. SALT LAKE CITY, UT NDW USE IAC CODE MDW WICHITA, KS NEA NEW PARIS TELEPHONE INC NEW PARIS, IN NEB NE COLORADO CELLULAR INC DBA CELL. ONE NORTHEAST COLORADO FT MORGAN, CO INC NEC NETWORK COMMUNICATIONS NED NEW ENGLAND TELEPHONE DISCOUNT SYSTEMS INC NORWALK, CT NEE NEW WORLD PHONE SERVICE, INC. NORRISTOWN, PA NEF NORTHEAST FLORIDA LONG DISTANCE CO., INC. MACCLENNY, FL NEG VERIZON NEW ENGLAND INC (PREV NEW ENGLAND TELEPHONE) BOSTON, MA NEH NATIONAL TELEPHONE EXCHANGE NEW YORK, NY NEI NETWORK I INC NEJ NYTEL CORP LONG ISLAND CITY, NY NEK NETWORK ENHANCED TECHNOLOGIES, INC. LOS ANGELES, CA NEL NETTEL(CODE INVALID) DENVER, CO NEM NEW ENGLAND MICROWAVE CORP HARTFORD, CN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–132 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NEN NET LEC, INC. DE PERE, WI NEO NELSON’S ELECTRONICS INC WINNER, SD NEP NETCOM ENTERPRISES NEQ NORTH-EASTERN PENNSYLVANIA TELEPHONE COMPANY FOREST CITY, PA NER NEW ERA COMMUNICATIONS INC ALEXANDRIA, VA NES NATIONAL EXCHANGE OF SEATTLE INC NET NETSHARE INC NEU NEMONT COMMUNICATIONS INC SCOBEY, MT NEV NEW TELCO, L.P. DBA SPRINT TELECOMMUNICATIONS VENTURE KANSAS CITY, MO NEW NEW-CELL INC PULASKI, WI NEX NATIONAL EXCHANGE BOLDER, CO NEY NEW EAST TELEPHONY, INC. BELHAVEN, NC NEZ NETCALL INC LANSING, MI NFB NATIONAL FIBERNET INC DE SOTA, TX NFC NATIONAL FIBER COM, INC. WAXAHACHIE, TX NFI NETWORK FACILITIES INTERNATIONAL DALLAS, TX NFL INTERMEDIA COMMUNICATIONS INC (PREV NATIONAL TELECOMM LIGHTHOUSE POINT, FL FLORIDA) NFM NORTHWEST FLORIDA MOBILE PHONE NFN NICHEL FONE INC SAN ANTONIO, TX NFR NEW FRONTIER TELECOMMUNICATIONS INC HAGERSTOWN, MD NFT NORTHEAST FLORIDA TELEPHONE COMPANY MACCLENMY, FL NFX NETFAX TECHNOLOGIES, INC MIAMI, FL NFY NFINITY COMMUNICATIONS INC. ALVORD, TX NGA NIAGARA TELEPHONE COMPANY NIAGARA, WI NGB NEW GLOBAL TELECOM INC GOLDEN, CO NGC NEXGEN TELECOMMUNICATIONS, INC. JERSEY CITY, NJ NGD NATIONWIDE LONG DISTANCE, INC. HOUSTON, TX NGE NEW EDGE NETWORK, INC. VANCOUVER, WA NGI NTEGRITY TELECONTENT SERVICES, INC SOUTHFIELD, MI NGL ANGELCOM, INC. WEST MEMPIS, AR NGN NEBRASKA CENTRAL TELECOM, INC T/A NCTC LONG DISTANCE GIBBON, NE NGO NORBRAM GLOBAL INC RICHMOND HILL, ON NGR NAS GLOBAL NETWORKS, INC. BOWIE, MD NGS NATIONAL DIGITAL SUBSCRIBER LINE.COM INC. HICKSVILLE, NY NGT NEBRASKA TECHNOLOGY & TELECOMMUNICATIONS, INC. LINCOLN, NE NGU NETGURU, INC. YORBA LINDA, CA NGV NETWORK PAGE CORP EASTON, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–133 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NGW NORTH AMERICAN GATEWAY, INC. TORONTO, ON NHA 900 AMERICA LTD AKRON, OH NHC NORTH COUNTY COMMUNICATIONS CORP LA JOLLA, CA NHD NEWPATH HOLDINGS, INC. DES MOINES, IA NHE NCHE TELEPHONE FAIRFAX, VA NHG NETVOICE TECHNOLOGIES INC DALLAS, TX NHH NTCH-IDAHO, INC. POCATELLO, ID NHI NOAH TELECOM, INC. BURBANK, CA NHL NEW HAMPSHIRE TELEPHONE COMPANY, INC. DBA MCT LONG CONTOOCOOK, NH DISTANCE NHM NORTEX COMMUNICATIONS CO. (PREV NORTH TEXAS COMM. CO.) MUENSTER, TX NHN NORTH PENN TELEPHONE CO. PRATTSBURGH, NY NHO CONCHO CELLULAR TELEPHONE CO., INC. PORT ARTHUR, TX NHP NECHES PAGING INC LUMBERTON, TX NHR NHT PARTNERSHIP BUFFALO, NY NHS NORTHCOAST COMMUNICATIONS, L.L.C. SYOSSET, NY NHT NORTH AMERICAN TELEPHONE TAMPA, FL NHU NORTH CENTRAL COMMUNICATIONS, INC. LAFAYETTE, IN NHV NEW HOPE TELEPHONE COOPERATIVE LONG DISTANCE, INC. NEW HOPE, AL NHW NTCH-WEST TENN, INC. HERMOSA BEACH, CA NHX NORTHEAST TELECOM, INC. COLLINSTON, LA NIC NIACOM COMMUNICATIONS INC NID NORTHWESTERN INDIANA TELEPHONE COMPANY HEBRON, IN NIE NITEL CORPORATION DALLAS, TX NII NSI COMMUNICATIONS SERVICES, INC. LYNDHURST, NJ NIK NII COMMUNICATIONS, LTD. SAN ANTONIO, TX NIL NORTHERN ILLINOIS CELLULAR COMMUNICATION INC DEKOLB, IL NIM NATIONAL IMS CORP NIN NTT INC (INVALID CODE) MILWAUKEE, WI NIO NATIONAL COMMUNICATIONS CORP AUSTIN, TX NIR NORTHERN INDIANA RADIOPHONE & PAGING SYSTEMS INC NIS NORTHWEST MISSOURI CELLULAR LIMITED PARTNERSHIP MARYVILLE, MO NIT NCR INTERNATIONAL TELECOMMUNICATIONS SERVICES INC NIX NETTRONIX, INC. SALT LAKE CITY, UT NJF NEW JERSEY FIBER TECHNOLOGIES PISCATAWAY, NJ NJL NECLEC, LLC HINGHAM, MA NJP NEW JERSEY STATE POLICE WEST TRENTON, NJ NJT NEW JERSEY TELECORP, LTD. SAYREVILLE, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 9–134 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NKA NETWORK ACCESS INC. HOLLYWOOD, FL NKC NETWORK CONSULTANTS INC BUFFALO, NY NKE NETWORK TELECOM EXCHANGE CORP, DBA NTX EASTON, PA NKH NETWORK TELEPHONE CORPORATION PENSACOLA, FL NKI NORARK COMMUNICATIONS, INC. WYNNE, AR NKL NUSHAGAK LONG DISTANCE DILLINGHAM, AK NKN NORTH LAKE NETWORK SERVICE DALLAS, TX NKP NETWORKPLUS FAIRFAX, VA NKS USE IAC CODE TIA BOCA RATON, FL NKT NORSK TELEKOM, L.L.C. SPRING GROVE, MN NKX THE NEW KNOXVILLE TELEPHONE COMPANY NEW KNOXVILLE, OH NLA NTC NET LONG DISTANCE INC. NEWPORT, NY NLC NORTEL COMMUNICATIONS INC SALT LAKE CITY, UT NLD NATIONAL DATA NLE NATIONAL TELEPHONE EXCHANGE (HARRISBURG) HARRISBURG, PA NLG NORLIGHT SUB OF MRC TELECOMMUNICATIONS INC MILWAUKEE, WI NLH NUSTAR TELEPHONE CO. INC. SMYRNA, FL NLI NEP, LLC WESTBROOK, ME NLK NETLINK SEATTLE, WA NLL NUCOMNET, LLC PLEASANTON, CA NLM NEHALEM TELEPHONE & TELEGRAPH CO. NEHALEM, OR NLN EXTELCOM DBA EXPRESS TEL (PREV. NATIONAL NETWORK CORP.) SALT LAKE CITY, UT NLO NATIONAL COMMUNICATIONS, LLC MILWAUKEE, WI NLP NATIONAL CALLING PLAN, INC. OSSINING, NY NLR NETLINX TELECOMMUNICATIONS, CORPORATION MIAMI, FL NLS NEURAL SYSTEMS INC SAN ANTONIO, TX NLT TELESPHERE COMMUNICATIONS INC (NOW WILTEL - WTL) OAKBROOK, IL NLU NLD USA SLOAN, IA NLX NORTH CAROLINA TELCOM, L.L.C. ROBBINS, NC NLY NEELY SALES SALT LAKE CY, UT NLZ NEXTEL PARTNERS OPERATING CORP KIRKLAND, WA NMA NATIONAL TELCOM MANAGEMENT, INC. FT. LAUDERDALE, FL NMC NO-MIS COMMUNICATIONS INC NMD NEUMEDIA BUCKHANNON, WV NME NEW MILLENNIUM COMMUNICATIONS, CORP MIAMI, FL NMG NETWORK MARKETING PLANO, TX NMI NWM MANAGEMENT, INC. JACKSON, MS NML NORTHERN MICHIGAN LDS PETOSKEY, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–135 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NMM NORTH MISSISSIPPI MOBILPHONE NMN NEWMAN NMO NORTHERN MONTANA COMMUNICATIONS BIG SANDY, MT NMP NIAGARA MOHAWK POWER CORP SYRACUSE, NY NMQ NATIONAL MOBILE COMMUNICATIONS CORP BURLINGTON, VT NMR NEWCOMM WIRELESS SERVICES INC GUAYNABO, PR NMS NELSON MARKETING SYSTEMS BRUNSVILLE, MN NMT NEW MEXICO TELEPHONE EXCHANGE ALBUQUEQUE, NM NMU NORTHEAST MISSOURI LONG DISTANCE, L.L.C. GREEN CITY, MO NMV NORTHWEST MICROWAVE INC YAKIMA, WA NMW NETWORK MICROWAVE INC HIGHLAND, CA NNC BELL ATLANTIC COMMUNICATIONS, INC. (PREV. NY-NJ CORRIDOR CO.) ARLINGTON, VA NND NATIONWIDE COMMUNICATIONS INCORPORATED FARMINGTON HILLS, MI NNE CTN TELEPHONE NETWORK, INC. LA JOLLA, CA NNG NORTHWEST NATURAL GAS NNH NATIONAL NETWORK TECHNOLOGIES, LLC NEW YORK, NY NNI NAVIGATE NETWORKS INC. BEVERLY HILLS, CA NNK NANKEE INCORPORATED COLLEGE PARK, MD NNL BROADWING TELECOMMUNICATIONS INC (PREV ECLIPSE COMM) AUSTIN, TX NNM NEW CONCEPT COMMUNICATIONS, LLC SANTA BARBARA, CA NNN CONESTOGA COMMUNICATIONS INC (PREV NORTHERN COMM. INC) BIRDSBORO, PA NNO NETCON TELCOM INC CRYSTAL RIVER, FL NNP NATIONNET COMMUNICATIONS CORPORATION JACKSON, MS NNR NEW NORTH TELECOMMUNICATIONS DBA CITIZENS LONG DISTANCE RHINELANDER, WI NNS NATIONAL NETWORKS COMMUNICATIONS SPECIALISTS BOISE, ID NNT NATIONAL COMMUNICATIONS NETWORK FT LAUDERDALE, FL NNU NATIONSLINK COMMUNICATION, INC. VALDOSTA, GA NNW NORTHLAND NETWORKS UTICA, NY NNX NORTHERN NEW MEXICO TELCOM MORA, NM NOA NETWORK ACI SEATTLE, WA NOC NORTHROP CORP HAWTHORNE, CA NOD NEW ORBIT COMMUNICATIONS, INC. SAN DIEGO, CA NOE NETWORK ONE ATLANTA, GA NOG NATCO TECHNOLOGIES, INC. FLIPPIN, AR NOH NORTHERN OHIO CELLULAR TELEPHONE CLEVELAND, OH NOI NO’MIS COMMUNICATIONS, INC. BROWNSVILLE, TX NOK NOKIA TELECOMMUNICATIONS INC WESTLAKE, TX NOL NORTHEAST TELEPHONE LONG DISTANCE, INC. PULASKI, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–136 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NOM NATIONAL TELECOM NON NEON INC WALTHAM, MA NOO NETCOM ON-LINE COMMUNICATION SERVICES, INC. SAN JOSE, CA NOP NORTHEAST PAGING SERVICE ST JOHNSBURY, VT NOQ N C TELECOM, INC. MEEKER, CO NOR NORTH AMERICAN TELECALL NOS NETWORK OPERATOR SERVICES INC LONGVIEW, TX NOT NEW ORLEANS TELEPORT INC NEW ORLEANS, LA NOU NORTH COUNTY TEL-COMM OCEANSIDE, CA NOV NOVACOM SYSTEMS HERRIN, IL NOW NOW COMMUNICATIONS, INC JACKSON, MS NOX NORTEX TELCOM, L.L.C. MUENSTER, TX NOY NATIONAL TELEPHONE COMPANY OF ALABAMA DBA CHEROKEE CHEROKEE, AL TELEPHONE CO NOZ NOS COMMUNICATIONS INC. BETHESDA, MD NPA NETWORK SERVICES, LLC. (PREV NATIONAL PAGING) EL SEGUNDO, CA NPC NJ-PA CORRIDOR CO NPD NORTHPOINT CANADA COMMUNICATIONS INC TORONTO, ON NPE NORTH PITTSBURGH TELEPHONE COMPANY GIBSONIA, PA NPF NET2PHONE NEWARK, NJ NPG NATIONAL PAGE INC NPH NATIONAL PAYPHONE SUPPLY DENVER, CO NPI USE IAC CODE NPA EL SEGUNDO, CA NPL NUMBER PLEASE LIMITED NPM NORTHERN PCS SERVICES, LLC WAITE PARK, MN NPN NPS, INC. CHAMPAIGN, IL NPO CANOPCO INCORPORATED ONTARIO, CN NPP NATIONAL PREPAID, INC. WORTH, IL NPR NATIONWIDE PAGING CORP. BELLROSE, NY NPS 90 PUBLIC SQUARE NPT N C P T CELLULAR INC SOQUEL, CA NPU NETWORK PLUS INC QUINCY, MA NPV NORTHEAST TELEPHONE SERVICE WASHINGTON CROSSING, PA NPW NPI WIRELESS, DIVISION OF NOVERR PUBLISHING, INC. TRAVERSE CITY, MI NPX NATIONAL PHONE CORPORATION SARASOTA, FL NPZ N.P.H. COMMUNICATIONS SAN ANTONIO, TX NQL NORTHQUEST TELECOM INC. TORONTO, ON

Proprietary — Licensed Material See proprietary restrictions on title page. 9–137 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NQT UNIVERSAL LONG DISTANCE, INC.(PREV. NATIONAL COMM. ASSOC. NEW YORK, NY INC) NRA NORTH AMERICAN CELLULAR COEUR D’ALENE, ID NRB NORWEST BANKS MINNEAPOLIS, MN NRC NR COMMUNICATIONS NRD NORTHLAND TELEPHONE SYSTEMS LTD UTICA, NY NRE NORTHEAST TELEPHONE CO PULASKI, WI NRF NORFOLK COUNTY INTERNET, INC FRANKLIN, MA NRG INVALID DO NOT USE MADISON, WI NRH NORTHEAST CELLULAR TELEPHONE CO., LP GRAY, ME NRI NORTHWEST TELEPHONE, INC. WENATCHEE, WA NRK NETWORK COMMUNICATIONS INC TOMBALL, TX NRL NORTEL TRAVERSE CITY, MI NRM NORTH AMERICAN COMMUNICATIONS CONTROL, INC. NEW YORK, NY NRN NORTH AMERICAN TELEPHONE NETWORK ATLANTA, GA NRO NORCOM INC. BOCA RATON, FL NRP NORTH AMERICA PAGING SANTA ANA, CA NRQ CHR TELECOMMUNICATIONS WOODSIDE, NY NRR NORTHSTARR COMMUNICATIONS INC BOULDER, CO NRS NORSTAR COMMUNICATIONS INC ORLANDO, FL NRT NEBRASKA RADIO TELEPHONE SYSTEMS, INC. LINCOLN, NE NRU NORTH CAROLINA RSA 3 CELLULAR TEL. CO DBA CAROLINA WEST WILKESBORO, NC WIRELESS NRV NORVERGENCE INC NEWARK, NJ NRW NORWAY RURAL TELEPHONE COMPANY KANAWHA, IA NRX ADN ENTERPRISES,INC DBA NORTH TEXAS TELECOMMUNICATIONS LEWISVILLE, TX NRY NEW CENTURY DATACOM, INC. GRAND JUNCTION, CO NRZ NEWROADS TELECOM FORT SMITH, AR NSA NORTHSTAR ACCESS, L.L.C. BIG LAKE, MN NSB NATIONAL SHAWMUT BANK OF BOSTON BOSTON, MA NSC NEWSOUTH COMMUNICATIONS LLC GREENVILLE, SC NSD NETWORK SERVICES LONG DISTANCE TREVOSE, PA NSE NORTHEAST TELECOM INC DBA NORTHEAST LONG DISTANCE COLLINSTON, LA NSF NORTH AMERICAN SOFTWARE ASSOCIATES, LTD. IUKA, MS NSG NETSOL TECHNOLOGIES, INC. CITY OF INDUSTRY, CA NSI NETCALL/AMSI FLINT, MI NSL NETWORK SERVICES LIMITED ASPEN, CO NSM NOSOMA SYSTEMS, INC. WEST BERLIN, NJ NSN NIELSEN COMMUNICATIONS INMAN, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–138 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NSO NEWSOUTH COMMUNICATIONS, LLC GREENVILLE, SC NSP CHIPPEWA VALLEY COMMUNICATIONS, INC. (PREV. NELSON DURAND, WI TELEPHONE) NSR NETWORK SERVICES INC PORTLAND, OR NSS NORTH STATE SYSTEMS INC NST NORTH STATE TELE. LONG DISTANCE CO DBA N. STATE COM LONG HIGH POINT, NC DISTANCE NSU NORTHSTAR TELECOM RSM, CA NSV NATIONAL TELE-SAV INC RENO, NV NSW NETWORK SWITCHING SERVICES INC HOUSTON, TX NSX NOVUS COMMUNICATIONS, INC. SEBRING, FL NSY NETSTREAM INC ROSEVILLE, CA NTA NETAMERICA CORP DALLAS, TX NTB NOTA BENE PHEONIX, AZ NTC NORTH AMERICAN TELEPHONE CO INC NTD NTE DESERT PHONE INC PALM DESERT, CA NTE NATIONAL TELEPHONE AND COMMUNICATIONS CORP NTF NTI TELECOM, INC(PREV NET TELECOMMUNICATIONS, INC) LAS VEGAS, NV NTG NACT (PREV. NETWORK TELEMANAGEMENT SERVICES) OREM, UT NTH NETECH COMMUNICATIONS CORP DENVER, CO NTI NETWORK TELECOMMUNICATIONS (NETTEL) DENVER, CO NTJ NET2000 (PREV NTEL) GERMANTOWN, MD NTK WORLDCOM, INC(PREV NETWORK TELEMANAGEMENT SERVICES INC) BOISE, ID NTL NATIONAL ECONO-TEL NTM NETWORK MANAGEMENT SERVICES PORTLAND, OR NTN NATIONAL TELECOMMUNICATIONS NETWORK NTO NATIONAL TELECOMMUNICATIONS INC PASCO, WA NTP NATIONAL TELEPHONE COMPANY NTQ NORTHERN TELECOM INC NASHVILLE, TN NTR NATIONAL TELSTAR INC SPARKS, NV NTS NTS COMMUNICATIONS INC NTT DATANET COMMUNICATIONS INC MILWAUKEE, WI NTU NET-TEL GROUP LLC (PREV. NET TEL, INC) RESTON, VA NTV WORLDCOM INC. (PREV. LDDS) TULSA, OK NTW USE IAC CODE NTI DENVER, CO NTX NATIONAL TELEPHONE EXCHANGE NTY NETEL FT. LAUDERDALE, FL NTZ INCOMNET COMMUNICATIONS (PREV EQUALNET CORP & NATIONAL NEWPORT BEACH, CA TELE CO)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–139 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NUA NUTEL COMMUNICATIONS TUCSON, AZ NUC NUSTAR COMMUNICATIONS CORP. MARIETTA, GA NUD NTC DALLAS, TX NUE NUESTRA TELEFONICA NEW YORK, NY NUH NORTHEAST LOUISIANA TELEPHONE COMPANY, INC. COLLINSTON, LA NUI NET COMMUNICATIONS CORP. SAN DIEGO, CA NUL NEW ULM TELECOM, INC. NEW ULM, MN NUM NEW MILLENNIUM TELECOMMUNICATIONS INC CHICAGO, IL NUN NUTEL COMMUNICATIONS, INC. LANDOVER, MD NUO NU TELECOM INC NEWARK, NJ NUP NUTEL PHONE SERVICE INC NORRISTOWN, PA NUR NORTHWEST RURAL ELECTRIC COOPERATIVE ORANGE CITY, IA NUS A+ NETWORK USA (PREV. NETWORK USA) PENSACOLA, FL NUT WALNUT COMMUNICATIONS, INC WALNUT, IA NUU NEW WORLD NETWORK USA INC COCONUT GROVE, FL NUW NU WAVE COMMUNICATIONS, INC. HOOD RIVER, OR NVA CONVERSENT COMMUNICATIONS LLC (PREV NEW ENGLAND VOICE & PROVIDENCE, RI DATA) NVB NEVADA BELL RENO, NV NVC NEW VECTOR COMMUNICATIONS INC NVD NEVADA COUNTY ANSWERING SERVICE GRASS VALLEY, CA NVE MPOWER COMMUNICATIONS CORP (PRV MGC COMMUN., INC LAS VEGAS, NV NVG NAVIGATOR TELECOMMUNICATIONS, LLC LITTLE ROCK, AR NVH NOVAH OF MICHIGAN EAST EINDSOR, CT NVI NORIGEN COMMUNICATIONS (PREV NAVITAR COMMUNICATIONS INC) TORONTO, ON NVL NEVADA TELEPHONE, INC. LAS VEGAS, NV NVM NORTHVOICE COMMUNICATIONS INC RICHMOND, BC NVN WILLIAMS COMMUNICATIONS, LLC (PREV WILLIAMS COMMUN, INC) TULSA, OK NVO NORTHERN VALLEY COMMUNICATIONS, L.L.C. BATH, SD NVR NOVUS TELECOM INC. VANCOUVER, BC NVS NETWORK RECOVERY SERVICES, INC. HUDSON, WI NVT AMERITEL (PREV. NAPA VALLEY TELECOMMUNICATIONS SERVICES) NAPA, CA NVU NOVACON, LLC. NORTHBROOK, IL NVW NEVADA WIRELESS SPARKS, NV NVY NEW VALLEY CORP UPPER SADDLE REVER, NJ NWA NETWORK ACCESS INC DAVIS, FL NWB NEWCOMM NET, INC. FREDERICK, MD NWC NORTHWEST COLO RADIO PHONE INC(DBA EGM 1994)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–140 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NWD NORTHERN WISCONSIN LDS (NETWORK 1 INC) WOODRUFF, WI NWE NORTHWEST COMMUNITY COMMUNICATIONS, INC. AMERY, WI NWF NEW ACCESS COMMUNICATIONS LLC MINNEAPOLIS, MN NWG NETWORK PAGING, INC. SPRINGDALE, AR NWH NETWORK TECHNOLOGIES INC SEBRING, FL NWI NORTHEAST NETWORKS INC WHITE PLAINS, NY NWJ NORTHWESTEL INC. WHITEHORSE, CN NWK NATIONAL WATS NETWORK NEW YORK, NY NWL NORTHWEST CELLULAR TOMAH, WI NWM NEW TIMES PHOENIX, AZ NWN NORTHWEST NETWORK INC READING, CA NWO FIRST COMMUNICATIONS, LLC (PREV BN1 TELECOMMUNICATIONS, AKRON, OH INC) NWP NATIONWIDE PAGING INC BURBANK, CA NWQ NATIONWIDE COMMUNICATION HOUSTON, TX NWR NETWORK TELEPHONE SERVICES INC WOODLAND HILLS, CA NWS WORLDCOM INC.(PREV. LDDS/WORLDCOM) TULSA, OK NWT NORTHWEST TELECOM LTD SNOWMASS VL, CO NWU NEWTEL COMMUNICATIONS INC ST JOHNS, NF NWV NEW WAVE CELLULAR COMMUNICATIONS PARIS, TN NWW EDGE WIRELESS, LLC. (PREV NEWCOM WIRELESS, LLC) BEND, OR NWX NETWORK CARRIER SERVICES NARBERTH, PA NWY NEW CENTURY TELECOM, INC. MCLEAN, VA NWZ NEWWAVE COMMUNICATIONS INC CORNELIUS, NC NXB TALKNOW, INC (PREV NEXBELL COMMUNICATIONS, INC.) CLEVELAND, OH NXC KDD AMERICA, INC(PREV NET EXPRESS COMMUNICATIONS INC) NEW YORK, NY NXE NXGEN NETWORKS, INC. DENVER, CO NXF NEX FONE DALLAS, TX NXG NEXTGEN TELEPHONE, INC. MOUNT SINAI, NY NXH NATL EXCHANGE OF HARRISBURG HARRISBURG, PA NXI NEXGEN INTEGRATED COMMUNICATIONS, L.C. URBANDALE, IA NXN NEXTIRAONE LLC HERNDON, VA NXO XO OHIO, INC (PREV NEXTLINK OHIO) COLUMBUS, OH NXP NETEXPRESS SYSTEMS INC SAN MATEO, CA NXR NEXSTAR COMMUNICATIONS INC BOCA RATON, FL NXS NEXUS TELECOM BURNABY, BC NXT NEXTEL COMMUNICATIONS SILVER SPRING, MD NXU NEXUS COMMUNICATIONS, INC COLUMBUS, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–141 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location NXW NEXTWAVE WIRELESS DALLAS, TX NXY NEXT GEN PHONE SYSTEMS, INC. CORVALLIS, OR NYA NY CITY TRANSIT AUTHORITY NEW YORK, NY NYC USE IAC CODE BAX ARLINGTON, VA NYD NYNEX LONG DISTANCE COMPANY NEW YORK, NY NYE NEW YORK LOCAL TELEPHONE, INC KNOXVILLE, TN NYI NEW YORK INSTITUTE OF TECHNOLOGY OLD WESTBURY, NY NYL NEW YORK LOTTERY GAMES SCHENECTADY, NY NYM NYNEX MOBILE COMMUNICATIONS COMPANY NYO NY-TEL COMMUNICATIONS INC LAKE SUCCESS, NY NYP NEW YORK ACCESS CORPORATION MIAMI, FL NYR NEW YORK RSA 2 CELLULAR PARTNERSHIP CROWN POINT, NY NYS NEW YORK TELSAVE, INC. NEW YORK, NY NYT NEW YORK TELECONNECT, INC. HARRISBURG, PA NYU NEW YORK UNIVERSITY NEW YORK, NY NYW NY TELENETWORKS INC NEW YORK, NY NYX USE IAC CODE BLX BOSTON, MA NZA NTERA, INC. MIAMI, FL NZC NORTHERN COLORADO COMMUNICATIONS, INC. WIGGINS, CO NZI NORTH AMERICAN INTELECOM SAN ANTONIO, TX NZL NATIONAL TELECOM INC EDLNA, MN NZR NORTHERN COMMUNICATIONS L P LOS ALTOS HILLS, CA NZT MATRIX TELECOM, INC. (PREV. NATIONAL TELEPROCESSING, INC.) FORT WORTH, TX OAC OPPENHEIMER AND COMPANY NEW YORK, NY OAE TOTALCOM AMERICA CORPORATION MIAMI, FL OAG CORPORATEPAGE.COM, INC. ROCHESTER, NY OAI COASTAL INTERNET ACCESS, INC NANTUCKET, MA OAK OAK CELLULAR ASSOCIATES WEST ATLANTIC CITY, NJ OAL ONSITE ACCESS LOCAL LLC NEW YORK, NY OAM CONTACT COMMUNICATIONS, INC. SCOTTSDALE, AZ OAN OAN SERVICES, INC. (PREV OPERATOR ASSISTANCE NETWORK) NORTHRIDGE, CA OAS TOLEDO AREA TELECOMMUNICATIONS SERVICES, INC. TOLEDO, OH OAT COMSCAPE TELECOMMUNCIATIONS, INC. COLUMBUS, OH OAU INTELCOM, INC. DUBLIN, OH OBB CONNECTICUT BROADBAND, INC. HARTFORD, CT OBC COMMUNICATIONS BROKERS & CONSULTANTS INC CALABASAS, CA OBM 1 COM, INC. PLAINVILLE, MA OBO COMPLETE BUSINESS SOLUTIONS INC FARMINGTON HILLS, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–142 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location OBS PROSPEED.NET, INC (PREV COMPLETE BUSINESS SYSTEMS, INC) TYNGABORO, MA OBT COMBINED TELECOM INC TORONTO, ON OCA OGDEN CHECK APPROVAL NETWORK, INC. VIRGINIA BEACH, VA OCB OVATION COMMUNICATIONS, INC (PREV OCI COMMUNICATIONS INC) MINNEAPOLIS, MN OCC OCC LIMITED BOSTON, MA OCD COLEMAN COUNTY TELECOMMUNICATIONS, INC. SANTA ANNA, TX OCE COCHRANE CELLULAR, INC. (PREV COCHRANE COOPERATIVE COCHRANE, WI TELEPHONE) OCG OMNPLEX COMMUNICATIONS GROUP LLC CHESTERFIELD, MO OCH C1 COMMUNICATIONS MISSISSAUGA, ON OCI OVERLOOK COMMUNICATIONS INTERNATIONAL, CORPORATION ATLANTA, GA OCJ SOUTH CANAAN CELLULAR COMMUNICATIONS COMPANY, LP FORT MEYERS, FL OCK CONSOLIDATED COMMUNICATIONS NETWORKS, INC. DICKINSON, ND OCL NO 1 CELLULAR 1 BARRINGTON, IL OCM OMNI COMMUNICATIONS INC OCN OLYMPIC COMMUNICATION NETWORK STANWOOD, WA OCO CORECOMM (PREV OCOM CORP) WORTHINGTON, OH OCP CONNECT COMMUNICATIONS CORPORATION DBA TOTAL CONNECT LITTLE ROCK, AR OCQ O1 COMMUNICATIONS INC SACREMENTO, CA OCR ORANGE COUNTY RADIO TELEPHONE OCS OKLAHOMA COMMUNICATION SYSTEMS INC OCT OCCT OK CITY, OK OCU CONEXONE COMMUNICATIONS LLC PASADENA, CA OCV COM2000 SAN JOSE, CA OCW OTELCO TELECOMMUNICATIONS, LLC (PREV OTELCO & ONEONTA ONEONTA, AL TELE CO) OCX USE IAC CODE HWC SCHAUMBURG, IL OCY ORANGE CITY COMMUNICATIONS, LLP ORANGE CITY, IA OCZ OCC COMMUNICATIONS CORP CEDAR HILL, TX ODC ONEIDA COUNTY TELEPHONE LONG DISTANCE HOLLAND PATENT, NY ODE STATE OF OREGON DEPT OF ENERGY ODL COMTEL DEBIT TECHNOLOGIES LLC LYNDHURST, NJ ODP USE IAC CODE OSO DALLAS, TX ODR COLUMBIA DIVERSIFIED SERVICES, INC. RIVERDALE, NY ODS ODESSA CELLULAR CORP FAIRFIELD, CA ODT ORLANDO DIGITAL TELEPHONE CORPORATION ORLANDO, FL ODX ODIN TELEPHONE EXCHANGE, INC ODIN, IL OEA COMMCENTRAL INC DBA COMMCENTRAL GRAND PRAIRIE, TX OEC OMEGA CELLULAR PARTNERS SALT LAKE CITY, UT

Proprietary — Licensed Material See proprietary restrictions on title page. 9–143 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location OED CONSOLIDATED EDISON COMMUNICATIONS, INC. NEW YORK, NY OEE ONE CLEAR TELECOM LOS ANGELES, CA OEH AVISTA COMMUNICATIONS, INC (PREV ONE EIGHTY SPOKANE, WA COMMUNICATIONS, INC) OEI ONEIDA NETWORK SERVICES, INC. ONEIDA, IL OEK OTEL TELEKOM, INC. MANCHESTER, NH OEL COMTECH 21, LLC. WALLINGFORD, CT OEM TOWN OF EAGLE MOUNTAIN EAGLE MOUNTAIN, UT OEN COMMSOURCE INTERNATIONAL LLC SAN RAFAEL, CA OEO COREON, INC. STATEN ISLAND, NY OEP COMMUNICATION EXPERTS, INC. LAS VEGAS, NV OES COMTECH SOLUTIONS, L.L.C. GOLDEN, IL OET COM NET, INC. DEFIANCE, OH OEW ONE EIGHTY NETWORKS, INC. SPOKANE, WA OEX COMTEX CORPORATION SEATTLE, WA OEY ONE EIGHTY COMMUNICATIONS, INC. BILLINGS, MT OEZ ONE EZ CALL, INC KEYSTONE HEIGHTS, FL OFC ONFIBER CARRIER SERVICES, INC. CUPERTINO, CA OFE OFFICECOMM, INC. AUSTIN, TX OFF OFF-CAMPUS COMMUNICATIONS OREM, UT OFM OREGON FARMERS MUTUAL LONG DISTANCE, INC. OREGON, MO OGA CONVERGIA POINTE-CLAIRE, PQ OGC OGDEN COMMUNICATIONS, INCORPORATED RESTON, VA OGD OGDEN TELEPHONE COMPANY SPENCERPORT, NY OGE COGECO CABLE INC MONTREAL, PQ OGM APOGEE TELECOM, INC. AUSTIN, TX OGO COMSAT GENERAL CORPORATION BETHESDA, MD OGT INTEGRA TELECOM OF OREGON, INC (PREV OGC TELECOMM LTD) BEAVERTON, OR OGV COUNCIL GROVE TELEPHONE COMPANY COUNCIL GROVE, KS OHC OHIO CELLULAR RSA LIMITED PARTNERSHIP FT MYERS, FL OHD OHIO DEPARTMENT OF ADMINISTRATIVE SERVICES COLUMBUS, OH OHE OPTICAL TELEPHONE CORPORATION HUNTSVILLE, AL OHL OHIO LINX CLEVELAND, OH OHN CONNECT COMMUNICATIONS CORPORATION DBA CONNECT LITTLE ROCK, AR OHO OLD HOME OPERATOR DALLAS, TX OHR OHIO DIRECT COMMUNICATIONS, INC. MIDVALE, UT OHS THE OHIO STATE UNIVERSITY COLUMBUS, OH OHT SOUTHERN TELECOM, INC. ATLANTA, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–144 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location OIA COMMCHOICE OF IOWA, LLC DAKOTA DUNES, SD OIC OMNICOM PAGING PLUS MISSOULA, MT OIL THE CONTACT NETWORK, INC. DBA INLINE BIRMINGHAM, AL OIM OPTIMUM GLOBAL COMMUNICATIONS, INC. SPRINGFIELD, MA OIN TOTALINK OF INDIANA, LLC. FRANKLIN, MA OIT 9278 COMMUNICATIONS, INC BRONX, NY OIW CT COMMUNICATIONS NETWORK, INC. URBANA, OH OIY COMMUNITY INTERNET SYSTEMS, INC. COLUMBUS, NE OKC O K COMMUNICATIONS OKK OK CELLULAR KINGFISHER, OK OKL OKLAHOMA CELLULAR INC BOSTON, MA OKP INTREX TELECOMMUNICATIONS CORP (PREV OK PHONELINES CORP) EDMOND, OK OKR OKLAHOMA RADIO SYSTEM MOORE, OK OLC O L C CO HOUSTON, TX OLD OKLAHOMA LONG DISTANCE OKLAHOMA CITY, OK OLE CONSOLIDATED LONG DISTANCE, INC. LINCOLN, NE OLF COALFIELDS TELEPHONE COMPANY INC HAROLD, KY OLG COMLOGIC, INC. PRESTO, PA OLI ONLINE COMMUNICATIONS INC SANTA CLARA, CA OLK ALEC, INC (PREV OPTILINK COMMUNICATIONS, INC.) TIFTON, GA OLL COMCELL, INC. WINDTHORST, TX OLM COLUMBUS PCS INDEPENDENCE, OH OLN OLYMPIA LEASING INC PARIS, TX OLO COLO.COM BRISBANE, CA OLP CINERGY COMMUNICATIONS COMPANY (PREV COMMUNITY EVANSVILLE, IN TELEPHONE CORP) OLS OLD LAREDO SERVICE LAREDO, TX OLT OLTRONICS INC ORLANDO, FL OLV COLORADO VALLEY LONG DISTANCE LA GRANGE, TX OMA AAA COMMUNICATIONS, LTD DBA AAA BEEPERS NORTH CHARLESTON, SC OMB IG2, INC (PREV COMPUTER BUSINESS SCIENCES, INC) KEW GARDENS, NY OMC OMAHA CELLULAR TELEPHONE CO OMAHA, NE OMD COMCAST TELEPHONY COMMUNICATIONS OF MARYLAND, INC. PHILADELPHIA, PA OME COMMUNICATIONS EQUIPMENT & SERVICE INC FAIRBANKS, AK OMF COMVERSE MANAGED SERVICES ALPHARETTA, GA OMG OMEGA ELECTRONICS AMARILLO, TX OMH COMMCHOICE L.L.C. DAKOTA DUNES, SD OMI OMNI MARKETING & MANAGEMENT CO INC LEESUMMIT, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–145 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location OMJ TOTALINK OF MASSACHUSETTS, LLC. FRANKLIN, MA OMK COMLINK, L.L.C. OKEMOS, MI OML OMNICALL GREENVILLE, SC OMM C-COMM, INC. WINCHESTER, VA OMN OMNICOM OMO COMMUNICATION OPPORTUNITIES, INC. BROOKLYN, NY OMP OZARK MOBILPHONE INC OMQ COMCAST BUSINESS COMMUNICATIONS INC PHILADELPHIA, PA OMR OREGON MOBILE RADIO INC MEDFORD, OR OMS COMMUNICATION SPECIALISTS, INC. TEXARKANA, AR OMT OHIO MOBILE TELEPHONE CO OMU OMNI COMMUNICATIONS INC PALM BEACH GARDENS, FL OMV OMC COMMUNICATIONS, INC. BETHESDA, MD OMW COMMUNITY COMMUNICATIONS NETWORK, INC. BURLINGTON, WI OMX OMNIWERX ANAHEIM, CA OMY TOTALINK OF MICHIGAN, LLC. FRANKLIN, MA OMZ OMNI PRISM COMMUNICATIONS INC ARLINGTON, TX ONA ONA MANUFACTURING INC FRUIT HEIGHTS, UT ONB O.N. TEL NORTH BAY, ON ONC OMNICALL INC SEATTLE, WA OND CONNECT!LD, INC. LITTLE ROCK, AR ONE ONE CALL COMMUNICATIONS INDIANAPOLIS, IN ONG OPEN NETWORKS GLOBAL SERVICES RESTON, VA ONH COMPUCONNECTION NETWORK CORPORATION DBA MHO NETWORKS DENVER, CO ONI OMNICALL COMMUNICATIONS CORP WEST BLOOMFIELD, MI ONK COVISTA OF NEW YORK, INC. LITTLE FALLS, NJ ONL 101 ON LINE SAN FRANCISCO, CA ONM NEXTEL WEST CORP (PREV ONECOMM) DENVER, CO ONN 555 ON-LINE INCLINE VILLAGE, NV ONO CONCENTRIC NETWORK CORPORATION CUPERTINO, CA ONP OMNI-PAGE ANDREWS, TX ONR ONCOR COMMUNICATIONS INC BETHESDA, MD ONS OMEGA NETWORK SERVICE DALLAS, TX ONT OUTERNET CONNECTION STRATEGIES, INC. AUSTIN, TX ONU CONCERT USA BASKING RIDGE, NJ ONV OPTIMUM NETWORK SERVICES, LLC COLORADO SPRINGS, CO ONW CONNECT COMMUNICATIONS, LLC HICKORY, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–146 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ONX ACTION COMMUNICATIONS, INC. SCOTTSBLUFF, NE ONY CONTROL NETWORK SYSTEM INC STAFFORD, TX OOC COON CREEK TELECOMMUNICATIONS CORP BLAIRSTOWN, IA OOH ONCALL COMMUNICATIONS OF OHIO INC MARION, OH OOI COMTECK OF INDIANA, INC SWEETSER, IN OOM OWENSBORO MUNICIPAL UTILITIES OWENSBORO, KY OON OHIOTELNET.COM, INC. NEWARK, OH OOO TOTALINK OF OHIO, LLC. FRANKLIN, MA OOR ASTROCOM CORPORATION MIAMI, FL OOT COMM. DEPOT, INC. JACKSON, TN OPA U.S. TELECOM LONG DISTANCE INC(PREV CORPORATE CALLING LAS VEGAS, NV SERVICES) OPC OPTICALL COMMUNICATIONS SERVICES VICTORVILLE, CA OPE O1 COMMUNICATIONS, INC (PREV OPTION ONE COMMUNICATIONS SACRAMENTO, CA INC) OPG CONNSPEC AG VOITSBERG, AS OPI AXXENT CORP (PREV OPTEL COMMUNICATIONS CORP) TORONTO, ON OPJ COMMUNICATIONS PLUS, INC. MORGANTOWN, WV OPK OPENCOM INC AMESS, IA OPL OPTEL, INC. DALLAS, TX OPM OPTICOM CORP PITTSBURGH, PA OPN OLYMPIA NET NEW YORK, NY OPO USE IAC CODE CPV BELLEVILLE, NJ OPP TOPP COMM, INC. MIAMI, FL OPR OMNI PRISM COMMUNICATIONS, INC. ARLINGTON, TX OPS CORSICANA PAGING SERVICE, INC. CORSICANA, TX OPT OMNIPOINT COMMUNICATIONS, INC. WAYNE, NJ OPU OPENTEL COMMUNICATIONS, INC SANTA CLARA, CA OPV ONEPOINT SERVICES,L.L.C. PHOENIX, AZ OPZ TOPAZ TRADING FOREST HILLS, NY OQC ONQUE COMMUNICATIONS, INC. OKLAHOMA CITY, OK ORA CORAL TELECOM TALLAHASSEE, FL ORB CORBAN COMMUNICATIONS, INC. DALLAS, TX ORC OCEAN REEF CLUB ORD CORDIA COMMUNICATIONS CORP. NORWALK, CT ORE CORE COMMUNICATIONS, INC WASHINGTON, DC ORG OREGONTEL, LLC MCMINNVILLE, OR ORL ORLANDO TELEPHONE COMPANY ORLANDO, FL ORM COON RAPIDS MUNICIPAL UTILITY DAKOTA DUNES, SD

Proprietary — Licensed Material See proprietary restrictions on title page. 9–147 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ORN ORION TELECOM CUCAMONGA, CA ORO OREGON TELECOM INC. SALEM, OR ORP OREGON PAGING EUGENE, OR ORS US ORIRIS CORP DALLAS, TX ORU CORETEL MASSACHUSETTS, INC. ANNAPOLIS, MD ORV OHIO RIVER CELLULAR CORPORATION NEW YORK, NY ORW ORWELL TELEPHONE COMPANY ORWELL, OH ORX COREEXPRESS, INC. ST. LOUIS, MO OSA REVOLUTION NETWORKS, LLC. (PREV COMMUNITY SERVICE LONG WINTHRUP, ME DISTANCE) OSC ONE-STOP COMMUNICATIONS, INC. HINDSDALE, IL OSE CO SPACE SERVICES, LLC SOMERVILLE, MA OSG 101-6555 LONG DISTANCE CORP. (PREV OVERSEAS GLOBALTEL CORP) VANCOUVER, BC OSI CONVERGENT COMMUNICATIONS, INC. ENGLEWOOD, CA OSL ONE SOURCE TELECOMMUNICATIONS INC DUBLIN, CA OSM OSAGE MUNICIPAL COMMUNICATIONS UTILITY OSAGE, IA OSN COMMUNICATION SERVICES INTEGRATED, INC CARROLLTON, GA OSO COMMSOUTH COMPANIES, INC DALLAS, TX OSP ONE STOP CELLULAR & PAGING ONTARIO, CA OSQ ONESUITE CORPORATION LOS ANGELES, CA OSR OPERATOR SERVICE COMPANY LUBBOCK, TX OSS COMPASS TELECOMMUNICATIONS, INC SCOTTSDALE, AZ OST DATA COM INC (PREV OFFSHORE TEL CO) MOGAN CITY, LA OSU MIDWEST CELLULAR TELEPHONE CO., DBA CELLULAR ONE OKLAHOMA CITY, OK OSV COSERV, L.L.C. LEWISVILLE, TX OSW USE IAC CODE CRC LAS VEGAS, NV OSX ONSITE ACCESS, INC. NEW YORK, NY OTA TOTALAXCESS.COM OAKLAND, CA OTC OTTER TAIL CELLULAR TELEPHONE CO BROOKFIELD, WI OTD COLE T. DAVIS CABOT, AR OTE ONE TEL INC. LONG BEACH, CA OTH ONE TOUCH COMMUNICATIONS RALEIGH, NC OTI OLYMPIA TELECOM PARIS, TX OTK TOTAL CALL INTERNATIONAL INC LOS ANGELES, CA OTL COLUMBIA TELECOMMUNICATIONS, INC. BATON ROUGE, LA OTM COMCAST TELEPHONY COMMUNICATIONS HOLDINGS, INC. PHILADELPHIA, PA OTN OVERSEAS TELECOMMUNICATIONS INC ALEXANDRIA, VA OTO CCO TELECOM INC KANSAS CITY, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–148 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location OTP CONSUMERS TELEPHONE AND TELECOM, LLC FAYETTEVILLE, NC OTQ ORION TELECOMMUNICATIONS INC. BAYSIDE, NY OTR OTTER TAIL TELCOM FERGUS FALLS, MN OTS COMMITTED TELEPHONE SERVICES EAST ORANGE, NJ OTT OXFORD COUNTY TELEPHONE AND TELEGRAPH COMPANY BUCKFIELD, ME OTU OMNITEL COMMUNICATIONS, INC. NORA SPRINGS, IA OTV COMPANIA ANONIMA NACIONAL TELEFONOS DE VENEZUELA (CANTV) CARACAS 1010, VE OTW TOTAL NETWORK COMMUNICATIONS, INC. RICHLAND, WA OTX OR-TEX LONG BEACH, WA OTY TOUCH TONE COMMUNICATIONS WHIPPANY, NJ OTZ OTZ TELECOMMUNICATIONS, INC. KOTZEBUE, AK OUA @ COMMUNICATIONS, INC. MOREHEAD CITY, NC OUC C-1 COMMUNICATIONS, INC. EMILY, MN OUE SOUTH CENTRAL TELCOM, LLC GLASGOW, KY OUI C3 COMMUNICATIONS, INC. AUSTIN, TX OUL SOUND CHOICE COMMUNICATIONS, LLC ST. PAUL, MN OUM CONSUMER TELCOM, INC. HENDERSON, NV OUN ON US NETWORK KENNEDALE, TX OUO OU CONNECTION, INC. ADA, MN OUR SOUTHERN RECONNECT, INC MOBILE, AL OUS S & T COMMUNICATIONS, INC. BREWSTER, KS OUT OUTSIDE CONNECTION, INC. ROCKVILLE CENTRE, NY OVA COVISTA, INC. LITTLE FALLS, NJ OVC COVAD COMMUNICATIONS COMPANY PALO ALTO, CA OVE CONVERGENCE, INC. TAMPA, FL OVG OPENBAND OF VIRGINIA, INC. CHANTILLY, VA OVI COVISTA OF VIRGINIA, INC. LITTLE FALLS, NJ OVL COON VALLEY LONG DISTANCE, INC. COON VALLEY, WI OVM ONE VOICE COMMUNICATIONS, INC. STERLING, VA OVN SOVEREIGN COMPANIES, LLC DBA SOVEREIGN DENVER, CO TELECOMMUNICATIONS OVO COMMUNICATIONS VENTURE CORPORATION DBA INDIGITAL NEW PARIS, IN TELECOM OVR CONVERGENCE TELECOM GROUP, LLC. NEW YORK, NY OVS CONVERGENT TELESIS LLC SOUTHAMPTON, NY OVT OVATION COMMUNICATIONS, INC MINNEAPOLIS, MN OVU CONNECTIVA COMMUNICATIONS CORPORATION UNION CITY, IN OVY ONVOY INC PLYMOUTH, MN OWP OLD WEST PAGING AND COMMUNICATIONS REDMOND, UT

Proprietary — Licensed Material See proprietary restrictions on title page. 9–149 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location OWT OKLAHOMA WESTERN TELEPHONE COMPANY CLAYTON, OK OWY ONE WAY COMMUNICATIONS, INC. SOMERS PT, NJ OXB OXBORROW TELECOM, INC. MESA, AZ OXD OXNARD CELLULAR CITY COMMERCE, CA OXF OXFORD COUNTY TELEPHONE SERVICE COMPANY DBA OXFORD BUCKFIELD, ME NETWORKS OXG ORIX GLOBAL COMMUNICATION INC LAS VEGAS, NV OXI OMNETRIX INTERNATIONAL, INC. LOS ANGELES, CA OXT COMBINED XCHANGE TELECOM INC WATERLOO, ON OYP OLYMPIC PAGING CO TACOMA, WA OYS ONE COMMUNICATIONS SYSTEMS, INC. LONDON, KY OZC ZCO, INC. DUBLIN, OH OZK OZARK TELCOM INC SPRINGFIELD, MO OZM OZMAIL INTERLINE JOLIMONT, AU PAA PEASE & ASSOCIATES PAB PACIFIC BELL SAN FRANCISCO, CA PAC LCI INTERNATIONAL TELECOM CORP(PREV PACE LONG DISTANCE GREENSBURG, PA SERVICE) PAD PRE-PAID PHONES, LTD LAS VEGAS, NV PAE PAGETEL DETROIT, MI PAF PAGE A FONE PAG PAGING ASSOCIATES PAH PAGE HAWAII HONOLULU, HI PAI PATHNET, INC. WASHINGTON, DC PAL PAGE ALERT/DIV OF COMMUNICATIONS ALERT INC FORT WAYNE, IN PAM PHONE AMERICA OF SOUTH DAKOTA RAPID CITY, SD PAN PANDA COMMUNICATIONS INC PITTSBURG, PA PAO PAGER ONE WEST PALM BEACH, FL PAP PAGE-A-PHONE PAR PA RADIO TELE CORP PAS PROFESSIONAL ANSWERING SERVICE INC PAT PATHFINDER COMMUNICATIONS PAU PACE TELECOM, INC. ATLANTA, GA PAV PAYROLL ADVANCE INC. MOUNTAIN HOME, AR PAW PAN AM WORLD AIRWAYS NEW YORK, NY PAX PAXX TELECOM, LLC SCOTTSDALE, AZ PAY PAY-TEL COMMUNICATIONS INC GREENSBORO, NC PAZ PACIFIC NORTHWEST CELLULAR INC BELLEVUE, WA PBA POINT BTA 371 LLC SANTA MONICA, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–150 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PBB PINE BELT BROADCASTING, LLC DBA PINE BELT TELE COMPETIVE ARLINGTON, AL SER. PBC PACBELL COMMUNICATIONS SAN DIEGO, CA PBD PACIFIC BELL DIRECTORY SAN FRANCISCO, CA PBE PACIFIC BELL DEVELOPMENT COMPANY SAN FRANCISCO, CA PBG PBC LONG DISTANCE ARLINGTON, AL PBI PACIFIC BELL INTERNET SERVICES SAN RAMON, CA PBK PAGING NETWORK OF BURBANK, INC. GLENDALE, CA PBL PAC BELL MOBILE COMMUNICATIONS SAN RAMON, CA PBM PREBON MONEY BROKERS INC NEW YORK, NY PBN PBI INC OKLAHOMA CITY, OK PBO PBT COMMUNICATIONS, INC. GILBERT, SC PBP PUBLIC TELEPHONE CORPORATION NORWOOD, NJ PBR PALM BEACH RADIO PBS PRUDENTIAL BACHE SECURITIES BOSTON, MA PBT PUBLIC TELEPHONE, INC. MONSEY, NY PBU PAUL BUNYAN RURAL TELEPHONE COOPERATIVE BEMIDJI, MN PBV PACIFIC TELESIS VIDEO SERVICES DBA PACIFIC BELL VIDEO SERVICES SAN RAMON, CA PBW POINT BTA 79 LLC SANTA MONICA, CA PBX SOUTHWESTERN BELL COMM SERV INC DBA PACIFIC BELL LONG SAN FRANCISCO, CA DISTANCE PBY ADVAMTEL, LLC DBA PLAN B COMMUNICATIONS SHREWSBURY, NJ PCA PCS COMMUNICATIONS CO ALTAMONTE SPS, FL PCB PACIFIC TELECOM CABLE INC VANCOUVER, WA PCC PORT CITY COMMUNICATIONS PORT HURON, MI PCD PENTAGON COMPUTER DATA CICERO, IL PCE PORTLAND CITY EMERGENCY COMMUNICATIONS PCF WESTERN WIRELESS CORPORATION BELLEVUE, WA PCG PHOENIX COMMUNICATIONS GROUP INC FLAGSTAFF, AZ PCH PAGE SOUTH - CHARLOTTE CHARLOTTE, NC PCI PCI COMMUNICATIONS INC AGANA, GU PCJ PAGECELL, INC. SAN FRANCISCO, CA PCK CELLULAR ONE - FINGER LAKES TELEPHONE CO (FMLY PCM INC) ITHACA, NY PCL UNITED COMMUNICATIONS (FMLY PROTO-CALL CORP) PORTLAND, OR PCM PAMPA COMMUNICATIONS PCN PACNET COMMUNICATIONS AUSTIN, TX PCO PHOENIX COMMUNICATIONS CO OF GEORGIA INC PCP PROCOMM PAGING PCQ PAGE COMMUNICATIONS, INC. NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–151 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PCR PENCOR SERVICES INC PALMERTON, PA PCS PITTSBURG COMMUNICATIONS SYSTEM PITTSBURG, KS PCT PACENET BEVERLY HL, CA PCU POINT COMMUNICATIONS CO ALBANY, OR PCV PUCCNI VOICE KENNEDALE, TX PCW PRICELLULAR WIRELESS CORPORATION NEW YORK, NY PCX PAGER & CELLULAR DEPOT HOUSTON, TX PCY PC CELLULAR OF KENTUCKY LP PADUCAH, KY PCZ PAGE COMMUNICATIONS LEAVENWORTH, KS PDA PRONTO DELAWARE CORP PITTSBURGH, PA PDC CONXUS SPECTRUM, INC. (PREV. PCS DEVELOPMENT (PCSD) GREENVILLE, SC CORPORATION PDD PAGEDATA BOISE, ID PDE PREPAID TEL.COM INC. CONCORD, CA PDG PAGING NETWORK OF SAN DIEGO, INC. SAN DIEGO, CA PDI PIONEER LONG DISTANCE KINGFISHER, OK PDK PREFERRED NETWORK SOLUTIONS, INC. PLAINVIEW, NY PDL PAGENET OF DALLAS DALLAS, TX PDM PARADIGM TELECOM CORP SEATTLE, WA PDN PREPAID TELECOM, INC. (GA) ATLANTA, GA PDO PREPAID CELLULAR, INC ROCHESTER, NY PDP PHONE DEPOTS INC PDQ PDQ COMMUNICATIONS SOURCE KILGORE, TX PDR PONDEROSA TELEPHONE CO (THE) O’NEALS, CA PDS PARADISE COMMUNICATIONS LONGVIEW, TX PDT PACIFIC DATAPORT INC ANKORAGE, AK PDU PIEDMONT COMMUNICATIONS SERVICES, INC. LEXINGTON, NC PDV PLATINUM DEVELOPMENT COMPANY,LLC. MONTEREY, CA PDW PHILADELPHIA GAS WORKS PHILADELPHIA, PA PDX PDGT.COM INC SEATTLE, WA PDY PDS, INC DALLAS, TX PEA PAGECAST INC. GILBERT, PA PEB PARKER FIBERNET, LLC. SUMMERVILLE, GA PEC PETE’S COMMUNICATIONS, INC. WILLIMAR, MN PED PINELAND PCS, INC. METTER, GA PEE PREMIER COMMUNICATIONS, INC. SIOUX CENTER, IA PEF PITTENCRIEFF COMMUNICATIONS, INC. ABILENE, TX PEG PREMIER PAGING, INC CANTON, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–152 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PEH PACIFIC EAST RESEARCH CORPORATION SUMAS, WA PEI PETRICCA COMMUNICATIONS SYSTEMS INC PEJ PRECONNECTION, INC. ELIZABETH, NJ PEK PEAK COMMUNICATIONS, INC. ORANGE, CA PEL PHONE LANGUAGE INC. CALGARY, CN PEM PHONECOMM USA PHILADELPHIA, PA PEN PENN TELECOM INC GIBSONIA, PA PEO RADIOENTERPRISE OF OHIO PEP PEPSICO PURCHASE, NY PER PENINSULA RADIO TELEPHONE PES PARTNERS TELECOM INC RICHARDSON, TX PET PETRA COM CORPORATION DALLAS, TX PEU PAGEUSA LOCAL AND NATIONWIDE PAGING DUBLIN, CA PEW PAGE ONE WIRELESS, INC. FORT COLLINS, CO PEX PAGE EXPRESS, INC. LAWNDALE, CA PEY PELL-TEL, INC. BLOOMFIELD, NJ PEZ PARKER COMMUNICATIONS, INC. (MT) HELENA, MT PFA ALASKA DIGITEL, LLC (PREV PACIFICOM ALASKA, LLC) MEMPHIS, TN PFB PROFESSIONAL BUREAU INC PFC PROFESSIONAL COMMUNICATIONS INC PFE PROFESSIONAL TELEPHONE ANSWERING SERVICE INC AUSTIN, TX PFG PREFERRED PAGING, INC. EVERETT, MA PFH PACIFIC SOUTH TELECOM, INC. DALLAS, TX PFI BROOKS FIBER COMUNICATIONS OF NEVADA,INC(PREV PHOENIX FOLSOM, CA FIBERLINK) PFK PRO-LIFE NETWORK, L.L.C. SCOTTSDALE, AZ PFL PROFESSIONAL COMMUNICATIONS INC PFM PACIFIC BELL MOBIL SERVICES PLEASANTON, CA PFN PENNY FONE SAN ANTONIO, TX PFO PHILADELPHIA FIBER OPTIC CORP CHICAGO, IL PFP CAPE FEAR PAGING COMPANY OF NORTH CAROLINA RALEIGH, NC PFQ PACIFICTEL COMMUNICATIONS INC AJAX, ON PFR PNI TECHNOLOGIES INC (PREV. PREFERRED NETWORKS, INC.) NORCROSS, GA PFS PAGE FIRST COMMUNICATIONS INGLEWOOD, CA PFT PACIFIC TELECOM, INC. VANCOUVER, WA PFU PF.NET COMMUNICATIONS, INC. HERNDON, VA PFV PREFERRED CARRIER SERVICES, INC. HURST, TX PFX PACIFIC TELECOMMUNICATIONS CORP LOS ANGELES, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–153 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PFY PACIFIC TELEKEY WEST COVINA, CA PGA PAGE AMERICA PGB PAGE BOY INC PGC PAGE AMERICA COMMUNICATIONS INC PGD PAGING DIMENSIONS INC ORANGE, CA PGE PORTLAND GENERAL ELECTRIC CO PGF PAGER PEOPLE BOZEMAN, MT PGG PAGING INCORPORATED BLACKSBURG, VA PGH PC-PLUS GMBH MUNICH, GE PGI PAGING PLUS ADA, OK PGJ PNG TELECOMMUNICATIONS, INC DBA POWERNET GLOBAL WEST CHESTER, OH COMMUNICATIONS PGK ARCH (PREV PAGING NETWORK OF MICHIGAN INC) SOUTHFIELD, MI PGL WESTSTAR WIRELESS COMMUNICATIONS, INC (PREV. PAGECALL INC) SAN LUIS OBISPO, CA PGM PAGE AMERICA COMMUNICATIONS OF CALIFORNIA INC HACKENSACK, NJ PGN PAGE NET ANAHEIM, CA PGO PAGE ONE PORTLAND, OR PGP PAGE PHONE CORP PGQ PAGERPLUS BATESVILLE, AR PGR PAGEMART INC DALLAS, TX PGS MBS COMMUNICATIONS INC SOUTH GATE, CA PGT PUGET SOUND POWER AND LIGHT PGU PAGE CLUB NORTHWEST MERCER ISLAND, WA PGV PAGE1 CHARLESTON, WV PGW PACIFIC GATEWAY EXCHANGE INC BURLINGAME, CA PGX PAGEX RADIO PHONE PGY PAGING PLUS AVOCA, PA PGZ P G PAGING ST CHARLES, MO PHA PHILLIPS COUNTY TELEPHONE COMPANY HOLYOKE, CO PHB INTEGRATED TELECOMMUNICATIONS SYSTEMS, INC (PREV FAIRFAX, VA TELESERV CORP) PHC PHONE CONNECTION JUNEAU, AK PHD PHONE DEPOT PHE PHONE MAIL INC GLEN MILLS, PA PHG BRE COMMUNICATIONS, L.L.C., D/B/A PHONE MICHIGAN FLINT, MI PHH BROADRIVER COMM CORP (PREV PUREPACKET COMM. OF THE ALPHARETTA, GA SOUTH, INC) PHI PHONEMATE INC PHK PHONE-LINK, INC. LAGRANGE, KY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–154 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PHL PANHANDLE TELECOM SYSTEMS INC GUYMAN, OK PHM PHILA MOBILE TELEPHONE CO PHN PHONE NET INC SALEM, OR PHO PT-1 COMMUNICATIONS INC (PREV. PHONETIME INC) FLUSHING, NY PHP PATH ENTERPRISES INC UNION, NJ PHR PHOTOTRONICS INC BALTIMORE, MD PHS PHASE 2 CAREFREE, AZ PHT PHONETEL TECHNOLOGIES INC CLEVELAND, OH PHU PHONE SOLUTION INCORPORATED PORTLAND, OR PHW PHANTOM NETWORKS, INC. FORT LAUDERDALE, FL PHX LCI INTERNATIONAL (PREV PHOENIX NETWORK CORP) PHY PECO HYPERION TELECOMMUNICATIONS PHILADELPHIA, PA PIA PHILACOM, INC OCEAN RIDGE, FL PIB PINPOINT COMMUNICATIONS, INC. CAMBRIDGE, NE PIC PACIFIC INLAND COMMUNICATIONS INC TUSTIN, CA PID PROCOM INTERNATIONAL LIMITED CICERO, IL PIE PREMIER LONG DISTANCE SERVOCES INC DUNCANVILLE, TX PIF PACIFIC COAST PAGING ESCONDIDO, CA PIG AT&T WIRELESS SERVICES, INC. SUB. (PREV NORTHERN ARKANSAS REDMOND, WA CELL.) PII PHONEIT, INC. HOUSTON, TX PIK PICK COMMUNICATIONS CORP WAYNE, NJ PIL PAGE ILLINOIS INC SPRINGFIELD, IL PIM PRIORITY COMMUNICATIONS INTERNATIONAL, INC. DBA PRICOMM LAPEER, MI PIN PINNACLE THREE COMMUNICATIONS INC NEW YORK, NY PIO PEOPLES COMMUNICATION INC QUITMAN, TX PIP PINE TELEPHONE COMPANY, INC. BROKEN BOW, OK PIR PINPOINT WIRELESS, INC. CAMBRIDGE, NE PIT PITTSBURGH INTERNATIONAL TELEPORT PITTSBURGH, PA PIU PAGING SOURCE USA, INC. BELLROSE, NY PIW PUBLIC INTEREST NETWORK SERVICES, INC. NEW YORK, NY PIX PHOENIX COMMUNICATIONS SOLUTIONS INC W NEW YORK, NJ PIY 2000 PAGING SYSTEMS TOTOWA, NJ PJC BELL ATLANTIC COMMUNICATIONS, INC.(PREV. PENNSYLVANIA- ARLINGTON, VA JERSEY COR) PJM PROJECT MUTUAL TELEPHONE COOPERATIVE ASSOCATION, INC. RUPERT, ID PKA PEAK COMMUNICATIONS, INC. (IL) BELLEVILLE, IL PKC PRONTO CHECK CASHING, INC. LUBBOCK, TX PKD PARKER LD WYLE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–155 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PKE PEMBROKE TELEPHONE COMPANY, INC. PEMBROKE, GA PKF PACIFIC LIGHTNET, INC. HONOLULU, HI PKG PARKERSBURG CELLULAR TELEPHONE CO PARKERSBURG, WV PKL POLLOCK LD SERVICE DALLAS, TX PKM POKA LAMBRO PCS, INC. LUBBOCK, TX PKN PARKINSON ELECTRONICS COMPANY LEVELLAND, TX PKO PAGING NETWORK OF ONTARIO, INC. ONTARIO, CA PKR PARKER COMMUNICATIONS INC DALLAS, TX PKS PARKERSON ELECTRONICS FORT WAYNE, IN PKT PACKETS RANCHO CORDOVA, CA PKU POKA LAMBRO TELECOMM., INC. DBA POKA LAMBRO TELEPHONE TAHOKA, TX COMPANY PKW PARKSIDE NETWORK SERVICE DALLAS, TX PKY PARKWAY COMMUNICATIONS INC PLANO, TX PLA PAGING NETWORK OF LOS ANGELES INC COMMERCE, CA PLB DIGITAL CELLULAR OF TEXAS LUBBOCK, TX PLC PROFESSIONAL COMMUNICATIONS MANAGEMENT INC BAXTER, MN PLD PENINSULA LONG DISTANCE SERVICE CORP STURGEON BAY, WI PLE PRIME LINE COMMUNICATIONS, INC DBA PRIME LINK LONG COLUMBIA, MO DISTANCE, INC PLF POCONO LEHIGH PAGING, INC. BANGOR, PA PLG PILGRIM TELEPHONE INC NEWTONVILLE, MA PLH XO PENNSYLVANIA, INC (PREV NEXTLINK PENNSYLVANIA ) READING, PA PLI GST PACIFIC LIGHTWAVE, INC.(PREV. PACIFIC LIGHTWAVE, INC.) RIVERSIDE, CA PLJ PAGING TULSA INC. TULSA, OK PLK PRAIRELINK LINCOLN, NE PLL PAGENET PAGING NETWORK OF ILLINOIS INC DURR RIDGE, IL PLM PALMETTONET FLORENCE, SC PLN PLAZA S-L INC. MCALLEN, TX PLO POKA LAMBRO COMMUNICATIONS TAHOKA, TX PLP AIRTOUCH PAGING (PREV. PACTEL PAGING) DALLAS, TX PLQ POLAR TELCOM, INC. PARK RIVER, ND PLR POLAR COMMUNICATIONS CORP OLD BRIDGE, NJ PLS PAYLINE SYSTEMS INC TUALATIN, OR PLT PORTERVILLE TELECOM FRESNO, CA PLU PLUS CELLULAR CORP MILWAUKEE, WI PLV PUBLIC SERVICE TELEPHONE COMPANY REYNOLDS, GA PLW PLANTERS TELEPHONE LONG DISTANCE, INC. NEWINGTON, GA PLX PLEXNET MIDLAND, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–156 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PLY PONDEROSA CABLEVISION DBA PONDEROSA LONG DISTANCE O’NEALS, CA PLZ PLANT LONG DISTANCE COMPANY CHULA, GA PMA PARAMOUNT MANAGEMENT ASSOCIATES CORP OREM, UT PMB PAT’S MOBILEPHONE INC PMC PERSONAL MOBILE COMMUNICATIONS PARTNERSHIP INCLINE VILLAGE, NV PMD PRONET MEDICAL HAYWARD, CA PME PREMIERE COMMUNICATIONS, INC. ATLANTA, GA PMF PM TELECOMMUNICATIONS, LLC ARLINGTON, TX PMG PSP MARKETING GROUP INC JACKSON, MS PMH PREMIERE TECHNOLOGIES ATLANTA, GA PMI PACIFIC MIDWESTERN INVESTMENT CO PALM DESERT, CA PMK PRONTO COM MARKETING, INC. COSTA MESA, CA PML POCONO MOBILE RADIO TELE CO INC PMM PREMIERE TELEMEDIA INC EL MONTE, CA PMN PROFESSIONAL MESSAGING SERVICES INC ERIE, PA PMO PALMERTON TELEPHONE COMPANY PALMERTON, PA PMP PARSON MOBILE AND PAGING PMR PORTLAND MARINE RADIO PMS PRIME CONNECTIONS, INC. WAKEFIELD, MA PMT PETOSKEY MOBILE TELEPHONE KALAMAZOO, MI PMU PALMER MUTUAL TELEPHONE COMPANY PALMER, IA PMV PEMBROKE ADVANCED COMMUNICATIONS, INC. PEMBROKE, GA PMW PANAM WIRELESS, INC GUAYNABO, PR PMX PHONE REMEDIES, LLC. ALLEN, TX PMY PAN-ATLANTIC TELECOM, INC. SHAKER HEIGHTS, OH PMZ POLARIS COMMUNICATIONS AND NETWORKING TECHNOLOGIES IBC LOS ANGELES, CA PNA PENN ACCESS CORP PITTSBURGH, PA PNB PHILADELPHIA NATIONAL BANK PHILADELPHIA, PA PNC PACIFIC NETWORK COMMUNICATIONS CORP PND PIONEER LONG DISTANCE ULYSSES, KS PNE PORTA-PHONE MACON, GA PNF PAGENET OF TAMPA TAMPA, FL PNG PIONEER LONG DISTANCE PHILOMATH, OR PNH PHONE CONNECTION PORTLAND, OR PNI PINNACLES TELEPHONE CO PAICINES, CA PNJ PACIFIC CENTREX SERVICES, LLC NORTH HOLLYWOOD, CA PNK ARCH (PREV PAGENET) OAKBROOK TERR, IL PNL PHONELINK INC BELLEVUE, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–157 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PNM PINE MOUNTAIN PNN PACNET COMMUNICATIONS NORTH PNO PAGING NETWORK OF OHIO INC PNP PAGING NETWORK OF PHILADELPHIA W CONSHOHOCKEN, PA PNQ PRONET, INC. LAKE SUCCESS, NY PNR PIONEER CELLULAR KINGFISHER, OK PNS PACNET COMMUNICATIONS SOUTH PNT PAGE N TELL INC PNU PANTEL COMMUNICATIONS, INC. ST. CHARLES, IL PNV PREMIERE NETWORK SERVICES, INC. DE SOTO, TX PNW PACIFIC NORTHWEST COMMUNICATIONS PNX PHOENIX COMMUNICATIONS INC PNY PAGEAMERICA OF NEW YORK INC SUNNYSIDE, NY PNZ PNC INC VERONA, IL POA PIONEER TELEPHONE COOPERATIVE INC KINGFISHER, OK POB APCO TELECOMMUNICATIONS, INC. BEVERLY, MA POC PAGING NETWORK OF ORANGE COUNTY, INC. ANAHEIM, CA POD COMMUNICATIONS CENTER PAGE ONE CHARLESTON, WV POE PROMO LINE INC. DIX HILLS, NY POF PARCOM COMMUNICATIONS INC NORTH PORT, FL POG PAGING SOURCE GROUP LLC BELROSE, NY POH PROGRESSIVE HOLDING RENTZ, GA POI PENTHOUSE SUITES, INC. IRVING, TX POK PEOPLES TELECOMMUNICATIONS, INC (KS) LACYGNE, KS POL ONVOY, INC. (PREV MEANS TELCOM) PLYMOUTH, MN POM PROMPT CALL ANSWERING SERVICE SAN ANTONIO, TX PON PAGER ONE HONOLULU, HI POO PROCOM COMMUNICATIONS, INC. DALLAS, TX POP PEOPLES TELEPHONE CO INC (PTC) MIAMI, FL POR PORT-A-PHONE POS HARMONIC SYSTEMS INC.(PREV. PNC ASSOC. INC.) MINNEAPOLIS, MN POT PRO TEL COMMUNICATIONS INC BIRMINGHAM, AL POU PEOPLES TELECOMMUNICATIONS, INC QUITMAN, TX POV PROGRESSIVE CASUALTY INSURANCE COMPANY MAYFIELD VILLAGE, OH POW PAGE ONE OF WYOMING, INC CHEYENNE, WY POX PHOENIX INTEGRATION, CORP. LOS ANGELES, CA POY PRIORITY COMMUNICATIONS, INC. BOCA RATON, FL POZ POINTE COMMUNICATIONS CORPORATION ROSWELL, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–158 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PPA PAGER PROMOTIONS, INC. VENICE, CA PPB POCKET PHONE BROADCAST SERVICE INC PPC PORTLAND PAGING COMPANY PPD PREPAID CELLULAR SERVICES, LLC ATLANTA, GA PPE PEOPLES PHONE CO DARIAN, CO PPF PEND OREILLE TELEPHONE COMPANY GLENNS FERRY, ID PPG PACIFIC PAGING INC PPH PAGE-PHONE INC PPI PAY PHONE INC PROVIDENCE, RI PPJ PAGING NETWORK OF SAN JOSE SAN JOSE, CA PPK PAGEPRO NETWORK LOS ANGELES, CA PPL PACIFIC POWER AND LIGHT PPM PRIMECO PERSONAL COMMUNICATIONS,L.P.(PREV. PCS PRIMECO) WESTLAKE, TX PPN ARCH (PREV PAGENET PAGING NETWORK INC) PLANO, TX PPO PAGING NETWORK OF OAKLAND OAKLAND, CA PPP MONTHLY PHONE SERVICES, INC. (PREV. PHONE CALLS, INC.) AURORA, IL PPQ PASSPORT TELECOM NEW YORK, NY PPR PAGING PARTNERS L P FREEHOLD, NJ PPS PAGERS PLUS TUSTIN, CA PPT PERSON TO PERSON TELECOM INC COLORADO SPGS, CO PPU PAGING PLUS COMMUNICATIONS GLENDALE, CA PPV PLAINS COOPERATIVE TELEPHONE ASSOCIATION, INC. JOES, CO PPW PAGING NETWORK OF SACRAMENTO SACRAMENTO, CA PPX PAPOSH LLC WALLINGFORD, CT PPY PRE-PAY U.S.A. INC. EAST NORTHPORT, BR PPZ PAGE PLUS OKLAHOMA CITY, OK PQS PRE-CELL SOLUTIONS, INC. MELBOURNE, FL PRA PRE-PAID LOCAL ACCESS PHONE SERVICE CO. SOUTH HOLLAND, IL PRB I-LINK COMMUNICATIONS (PREV FTI COMMUNICATIONS) PHOENIX, AZ PRC PLANNING RESEARCH CORP PRD POUGHKEEPSIE RADIO INC PRE PREMIERE PAGE CHAMPAIGN, IL PRF USA MOBILE (PREV. PROFESSIONAL COMMUNICATIONS INC.) CINCINNATI, OH PRG PROGRESSIVE CONCEPTS INC FORT WORTH, TX PRH PRESTIGE HOUSE PRI PRIME TIME COMMUNICATIONS INC RACINE, WI PRJ PACLEC CORPORATION LEBANON, PA PRK PARKWAY PAGING PLANO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–159 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PRL PUERTO RICO TELECOM SAN JUAN, PR PRM PROCOM INC OAKLAND, MD PRN PREMIER NETWORK SERVICES INC DALLAS, TX PRO ONE-2-ONE COMMUNICATIONS PHOENIX, AZ PRP PIERRE RADIO PAGING & TEL PRQ PRIMETEL COMMUNICATIONS, INC. PHILADELPHIA, PA PRR PARMER COMMUNICATIONS INC LEVELLAND, TX PRS PROCESS CONTROL DIVISION WALTHAM, MA PRT TRESCOM PUERTO RICO (PREV PUERTO RICO TELEPHONE) SAN JUAN, PR PRU NACC-TEL PAGING (PREV PAGERS PLUS CELLULAR) YUBA CITY, CA PRV PEOPLE’S RURAL TELEPHONE COOPERATIVE CORPORATION MCKEE, KY PRW PROCOMM, INC. VALPARAISO, IN PRX AQUITEL COMMUNICATIONS CORP (PREV BELL-EAST CO. INC,) BAYSHORE, NY PRY PRIORITY ONE PLUS LONG DISTANCE ONTARIO, CA PRZ PROPHONE COMMUNICATIONS INC MUSKEGON, MI PSA PSA INC DAYTONA BEACH, FL PSB PUGET SOUND BANK SEATTLE, WA PSC PHONEPOWER OF STATE COLLEGE PSD PAGENET OF SAN DIEGO INC SAN DIEGO, CA PSE PUBLIC SERVICE ELECTRIC & GAS NEWARK, NJ PSF PANAM SAT HOMESTEAD, FL PSG PRIME SERVICES GROUP, INC. LIVERMORE, CA PSH PRESTON ENTERPRISE, INC (PREV. THE PRESTON TELEPHONE PRESTON, IA COMPANY) PSI P S I PHONE SAVER INSTITUTE W ORANGE, NJ PSJ PIONEER CONSOLIDATED, INC. PHILOMATH, OR PSK PSINET INC HERNDON, VA PSL PERSONAL COMMUNICATIONS ALTOONA, PA PSM PAGING SYSTEMS INC BURLINGAME, CA PSN PLEASANT TELEPHONE ANSWERING SERVICE INC MT PLEASANT, MI PSO D&E/OMNIPOINT WIRELESS JOINT VENTURE L.P. DBA PCS ONE EPHRATA, PA PSP PROSPECT COMMUNICATIONS PSQ PENSAT INTERNATIONAL COMMUNICATIONS BETHESDA, MD PSR PUBLIC SERVICE CELLULAR INC COLUMBUS, GA PSS PROGRESSIVE PAGING BOISE, ID PST PRIMUS TELECOMMUNICATIONS, INC. MCLEAN, VA PSU PENINSULA COMMUNICATIONS INC TACOMA, WA PSV PUBLIC SERVICE CO OF NEW MEXICO ALBERQUERQUE, NM

Proprietary — Licensed Material See proprietary restrictions on title page. 9–160 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PSW PUBLIC SWITCH CORP WOODSIDE, NY PSX MAGNACOM WIRELESS LLC. DBA PCS PLUS INC. VANCOUVER, WA PSY PENNSYLVANIA TELEPHONE COMPANY JERSEY SHORE, PA PSZ CP-TEL NETWORK SERVICES, INC NATCHITOCHES, LA PTA PIEDMONT AIRLINES WINSTON-SALEM, NC PTB PIERCE TELEPHONE COMPANY PIERCE, NE PTC PETRO COMMUNICATIONS INC MIDLAND, TX PTD PRESTWOOD COMMUNICATIONS COMPANY PTE PACIFIC TELECOM CELLULAR INC TOMAH, WI PTF PHONETIME INTERNATIONAL MISSISSAUGA, ON PTG PAC TEL PAGING DALLAS, TX PTH GST TELECOM HAWAII, INC. (PREV PACWEST TELECOM HAWAII, INC). HONOLULU, HI PTI PROFESSIONAL TRANSMISSIONS INC SPRING, TX PTJ PATRIOTCOM INC HALLANDALE, FL PTK PACKET TEL CORPORATION KITCHENER, ON PTL PREMIERE TELECOMMUNICATIONS INC PTM PACTEL MOBILE ACCESS COSTA MESS, CA PTN PUBLIC TELEPHONE NETWORK INC MIAMI, MI PTO PRONTO WESTMOUNT, PQ PTP PROTECTOWIRE PACIFIC PTQ PREFERRED TELECOM, INC. DALLAS, TX PTR PETROLEUM COMMUNICATIONS HARAHAN, LA PTS PLANT TELECOMMUNICATIONS SALES AND SERVICE PTT THE PINE TREE TELEPHONE AND TELEGRAPH CO PTU PLATEAU CELLULAR INC LONGMONT, CO PTV VF COMMUNICATIONS, INC (PREV PINNACLE TELECOMM., OF VA , INC) VIRGINIA BEACH, VA PTW PT&T TELECOM, INC OAKLAND, CA PTX AMERICAN PTT LOS ANGELES, CA PTY ATLAS EQUITY, INC., DBA PERFORMANCE TELECOM NEWPORT BEACH, CA PTZ PROTEL INC LAKELAND, FL PUA PAETEC COMMUNICATIONS, INC FAIRPORT, NY PUB PUEBLO TELEPHONE SECRETARIAL SERVICE PUC PUBLIC COMMUNICATIONS ASSOCIATES LTD INC MCKEE CITY, NJ PUD PLDT (US) LTD DOVER, DE PUE PERSONAL COMMUNICATIONS NETWORK MELVILLE, NY PUG PARTNER COMMUNICATIONS GROUP, LLC NORTH BRANFORD, CT PUH PERSONAL TOUCH COMMUNICATIONS L.P. (PREV CUMBY CELLULAR CUMBY, TX COMM.)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–161 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PUI PREMIER COMMUNICATIONS DBA KTS PREMIER COMMUNICATIONS CHICAGO, IL PUK BROADRIVER COMMUNICATIONS COMPANY (PREV PUREPACKET ATLANTA, GA COMM, INC) PUL AIRTOUCH CELLULAR (PREV. PAC TEL CELLULAR) WALNUT CREEK, CA PUM PARAMOUNT COMMUNICAITONS INC RALEIGH, NC PUN PROGRESS TELECOMMUNICATIONS CORP ST. PETERSBURG, FL PUO PRESTO TELECOMMUNICATIONS, INC. SAN DIEGO, CA PUP PUBLIC PHONE EGG HARBOR TOWNSHIP, NJ PUR USE IAC CODE PRT SAN JUAN, PR PUS PAGING USA INC INDIANAPOLIS, IN PUT PEPCO COMMUNICAITONS L.L.C. WASHINGTON, DC PUU PAGER-ONE, INC. DBA TELESPECTRUM COMMUNICATIONS OF DULUTH, MN DULUTH PUV BROADRIVER COMM OF VIRGINIA CORP(PREV PUREPACKET COMM OF ALPHARETTA, GA VA INC PUW BROADRIVER COMM OF THE NORTHEAST CORP (PREV PUREPACKET ALPHARETTA, GA COMM NE) PUX PUBLIX NETWORK CORPORATION NORTH HAVEN, CT PVA PHONE RECONNECT OF AMERICA, LLC PORT ST. LUCIE, FL PVB PROVIS BROADBAND TEXAS, LLC HOUSTON, TX PVC PLATTE VALLEY COMMUNICATIONS GRAND ISLAND, NE PVE PV TELECOM, INC KINSPORT, TN PVH PRAIRIE GROVE TELEPHONE COMPANY PRAIRIE GROVE, AR PVI PV TEL ENTERPRISES INC MYRTLE BEACH, SC PVL P.V. TEL INC KINGSPORT, TN PVN PVT NETWORKS, INC. ARTESIA, NM PVO PEACE VALLEY TELEPHONE CO., INC. PEACE VALLEY, MO PVP PENNSYLVANIA PAY TELEPHONE ALLENTOWN, PA PVR PAUL VALRO DBA RE-HOOK 1 HUDSON, FL PVS THE PENNSYLVANIA STATE UNIVERSITY UNIVERSITY PARK, PA PVT PRIVATE TRANSATLANTIC TELECOMMUNICATIONS SYS INC MC LEAN, VA PVU PROGRESSIVE RURAL TELEPHONE COOPERATIVE, INC RENTZ, GA PVV PATUXENT RIVER NAVAL AIR STATION (NAWCAD) PATUXENT RIVER, MD PVW PVT WIRELESS LIMITED PARTNERSHIP ARTESIA, NM PVY PERSONAL SERVICE COMPANY DALLAS, TX PWB PALMETTO RURAL TELEPHONE COOPERATIVE, INCORPORATED WALTERBORO, SC PWC PACIFIC WESTERN CONTEL OF SACRAMENTO INC SACRAMENTO, CA PWD PASSWORD INCORPORATED SPOKANE, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–162 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PWE USE IAC CODE PWT STOCKTON, CA PWG PAGE NEW ENGLAND WEST SPRINGFIELD, MA PWH PULASKI WHITE COMMUNICATIONS, INC. STAR CITY, IN PWI P.W.I. HOLDINGS, INC. MISSOULA, MT PWK ARCH WIRELESS HOLDINGS, INC (PREV PAGING NETWORK, INC) PLANO, TX PWL PRICE COMMUNICATIONS WIRELESS, INC. DOTHAN, AL PWM PACIFIC WIRELESS SYSTEMS, LLC RICHLAND, WA PWN POWERNET, INC. RENO, NV PWO POWERTELNET COMMUNICATIONS INC PROSSER, WA PWP POWER PAGE, LLC INGLEWOOD, CA PWR POWERTEL,INC WEST POINT, GA PWS PACIFIC WIRELESS SAN FERNANDO, CA PWT USE IAC CODE ARZ STOCKTON, CA PWV PACIFIC WAVE COMMUNICATIONS MCMINNVILLE, OR PWY POWERCOM ENERGY AND COMMUNICATIONS ACCESS, INC. LOS ANGELES, CA PXC PHONEXCHANGE INC ALISO VIEJO, CA PXF USE IAC CODE PFI FOLSOM, CA PXI PLEXSYS INTERNATIONAL HERNDON, VA PXL PHOENIX LONG DISTANCE, INC. CLAYTON, OK PXM PPL TELCOM, LLC. ALLENTOWN, PA PXN PHOENIX NETWORK SAN FRANCISCO, CA PXR PREXAR, LLC ELLSWORTH, ME PXS PRTCOMMUNICATIONS, LLC LAURENS, SC PXT APEX TELECOM INC OAKLAND, CA PYA PRIORITY PAGING, INC JACKSONVILLE, FL PYC PAYLESS LONG DISTANCE, LTD RICHARDSON, TX PYE PAYPHONE SERVICES, INC CHICAGO, IL PYI PRICE COUNTY INFORMATION SYSTEMS, INC. PHILLIPS, WI PYK PAGE NEW YORK SCHENECTADY, NY PYL PAYTEL OF TEXAS INC DALLAS, TX PYM PAYPHONE MANAGEMENT CORP RICHARDSON, TX PYN PYMATUNING INDEPENDENT TELEPHONE COMPANY GREENVILLE, PA PYO PRIORITYONE TELECOMMUNICATIONS, INC. LA GRANDE, OR PYP THE OTHER PHONE COMPANY, INC. DBA ACCESS ONE FORT LAUDERDALE, FL COMMUNICATIONS PYQ PAYLESS TELECOM INC. BELLEVILLE, NJ PYR PERRY-SPENCER COMMUNICATIONS, INC. SAINT MEINRAD, IN PYS PAYPHONE SYSTEM REDDING, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–163 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location PYT PAY TELEPHONE THE ENGLEWOOD, NJ PZC PATHWAYZ COMMUNICATIONS, INC. AMARILLO, TX PZF DAVELTEL INC (PREV PHONE ZONE FRANCHISES LTD) TAMPA, FL PZH PIZZA HUT INC WICHITA, KS PZM PORTSMOUTH MOBILE TELEPHONE SERVICE PORTSMOUTH, OH PZO PLG NORTH, INC. CAMBRIDGE, MA PZP PALMER CELLULAR PARTNERSHIP FT MYERS, FL PZR PFIZER INC NEW YORK, NY PZS USE IAC CODE TGH EVANSVILLE, IN QAI QAI CAPITAL CENTRE ST. PAUL, MN QBC QUEBEC-TELEPHONE RIMOUSKI, PQ QCA QAI, INC. IRVINE, CA QCC QCC INCORPORATED OVERLAND PARK, KS QCK QUICKPIC PELL CITY, AL QIC QUAD INTERNATIONAL COMMUNICATIONS CORPORATION MOORPARK, CA QLC QUALCOMM INC SAN DIEGO, CA QLD QUESTAR INFOCOMM, INC. (PREV. QUESTAR SERVICE CORPORATION) SALT LAKE CITY, UT QLT QUALITY COMMUNICATIONS COMPANY GARLAND, TX QMC Q M C PAGING QMS QUESTAR MICROSYSTEMS INCORPORATED WOODINVILLE, WA QPS QUADRA PIPE AND SERVICE INC LONG VIEW, TX QRC QUESTAR RADIO COMMUNICATIONS SANTA MARIA, CA QRI QRATINGS INC NEW YORK, NY QRM R&M COMMUNICATIONS GREENVILLE, TX QRN QUORUM COMMUNICATIONS INC MORRISTOWN, NJ QSA QUALSTAR COMMUNICATIONS, INC. DEFIANCE, OH QSC QST COMMUNICATIONS INC. PEORIA, IL QSI QUSORON SYSTEMS INC NEW ORLEANS, LA QST QUEST COMMUNICATIONS CORP LAUDERDALE-BY-THE- SEA, FL QTC QUICK CONNECT TELEPHONE SERVICE, INC. MURRELLS INLET, SC QTK QUICK TEL BROOKLYN, NY QTL QTEL, INC. DALLAS, TX QTM QUANTUM COMPUTER SERVICES INC VIENNA, VA QTS QUOTRON SYSTEMS INC LOS ANGELES, CA QTT INVALID DO NOT USE CINCINNATI, OH QTU QUANTUM TELECOMMUNICATIONS, INC. MANCHESTER, MD QTX QUANTREX COMMUNICATIONS, INC. VIRGINIA BEACH, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–164 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location QUC AQUIS COMMUNICATIONS, INC. PARSIPPANY, NJ QUE 9107-1365 QUEBEC INC. VALCOURT, PQ QUI QUICK-TEL COMMUNICATIONS, INC. BOYD, TX QUK QUICK COMMUNICATIONS, INC. CLARKSTON, MI QUN QUANTUM COMMUNICATIONS GROUP INC MINNEAPOLIS, MN QUS QUICK COMMUNICATIONS, INC. (MS) MERIDIAN, MS QWE QWEST MICROWAVE CORP QYT QUALITY TELEPHONE INC MESA, AZ RAC RACO INC RAD RADIO COMMUNICATIONS CONSULTANTS INC RAE RA-TEL COMPANY INC RAG RAM PAGING HAWAII HONOLULU, HI RAI RADIO COMMUNICATIONS COMPANY INC CEDAR RAPIDS, IA RAL REAL NAVIGATION SYSTEMS CORP DBA REAL TELEPHONE COMPANY SAN FRANCISCO, CA RAM RAM TELEMATICS SYSTEMS INC RAN R R T OF ASPEN INC RAP RADIO PAGING RAR RANGER PAGING JOURDANTON, TX RAS RADIO PAGING OF ASPEN INC ASPEN, CO RAX RAM COMMUNICATIONS SEATTLE, WA RAY RAYCOMM, INC. DBA KAUA’I PAGING & COMMUNICATIONS LIHUE, HI RAZ RACOM LA GRANDE, OR RBC RADIO BROADCASTING COMPANY RBD RAM BROADCASTING OF INDIANA INC RBE R & B ENTERPRISE PLANO, TX RBF ROANOKE & BOTEFOURT TELEPHONE CO DANEVILLE, VA RBG RAM BROADCASTING INC RBH RICE BELT TELEPHONE COMPANY, INC. WEINER, AR RBI ROBO TEL, INC LOMITA, CA RBL REBL COMMUNICATIONS SANTA ROSA, CA RBM R & B COMMUNICATIONS DALEVILLE, VA RBN R&B NETWORK, INC. (WHOLLY OWNED SUB OF NTELOS INC.) DALEVILLE, VA RBO RAM BROADCASTING OF OREGON RBP RADIO BROADCASTING CO PA RBR CAROLINA BROADBAND, INC. CHARLOTTE, NC RBS RAM/BSE PAGING CO L.P. PITTSBURGH, PA RBT RAM BROADCASTING OF TEXAS RBU ROBERT’S COMMUNICATIONS INC. LITTLE ROCK, AR

Proprietary — Licensed Material See proprietary restrictions on title page. 9–165 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RBW RAINBOW COMMUNICATIONS PHOENIX, AZ RBZ ROYAL PAGING PEORIA, AZ RCA RCA AMERICAN COMMUNICATIONS INC RCB CARRIERCOM CORPORATION MCALLEN, TX RCC RA-CO COMMUNICATIONS INC BRADLEY, IL RCD REACH DIRECT, INC. DALLAS, TX RCE TRC TELECOM KERRVILLE, TX RCF ROBERT CEFAIL & ASSOCIATES SAN ANTONIO, TX RCG MCI (PREV. RCA GLOBAL COMMUNICATIONS INC) RICHARDSON, TX RCH ROCHESTER COMMUNICATIONS INC RCI RADIO CALL-IN RCJ REGIONAL CABLESYSTEMS INC. SUDBURY, ON RCK RESIDENTIAL COMMUNICATION NETWORK, INC. PRINCETON, NJ RCL RETEL-COM LTD RCM RADIO COMMUNICATIONS CO RCN R A COMMUNICATIONS INC RCO RAM BROADCASTING OF COLO INC RCP RADIO CALL CORP REDONDO BEACH RCQ RCS INC RCR RADIO COMMUNICATIONS CENTER JONESBORO, AR RCS RADIO COMMUNICATIONS SERVICE PITTSBURY, KS RCT RADIO CONTACT CORP RCU RADIO COMMUNICATIONS CORP SCHAUMBURG, IL RCV RADIO COMMUNICATIONS OF VA INC GLEN ALLEN, VA RCW RC&A SAN ANTONIO, TX RCX CYLIX COMM NETWORK (PREV RCA CYLIX COMM NETWORK) MEMPHIS, TN RCY RCC ATLANTIC INC ALEXANDRIA, MN RCZ R C S INC RDA REDUCED ALTERNATIVE TEL SERVICE INCLINE VL, NV RDC RADIO COMMUNICATIONS INC PRINCE FRED, MD RDE RADIO ELECTRONICS INC MIDLAND, TX RDG RADIOPAGE KALISPELL, MT RDH ARDMORE TELEPHONE COMPANY ARDMORE, AL RDI RADIOCALL CO RDJ R D & J COMMUNICATIONS MANAGEMENT INC MYRTLE BEACH, SC RDL RADIOTELEPHONE OF LOUISIANA RDM RADIO & COMMUNICATION CONSULTANTS, INC. SHREVEPORT, LA RDN RETAIL DATA NETWORKS (RDN) ATLANTA, GA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–166 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RDO RADIO BROADCASTING CO RDP RADIO DISPATCH COMPANY KALAMAZOO, MI RDR RAPID RADIO SERVICE PALMDALE, CA RDS RADIO DISPATCH SERVICE RDT RADIO TELEPHONE INC ASHLAND, KY RDU ARDMORE COMMUNICATIONS, LLC. ARDMORE, TN RDV RADIO CALL CO OF VIRGINIA INC RICHMOND, VA RDW R & D NETWORK SERVICES, INC MIAMI, FL RDX PACIFIC COMLINK INC (PREV. RADIX TECHNOLOGY, INC.) SEATTLE, WA RDY RADIO TELEPHONE COMPANY OF DAYTONA REA REAL CONNECT PORTLAND, OR REC REDI-CALL CORP RED REDI-CALL COMMUNICATIONS GEORGETOWN, DE REE RIEBE, DAVID S DBA ELECTRONIC ENTERPRISES BOISE, ID REG RELIANT ENERGY COMMUNICATIONS, INC. HOUSTON, TX REI REBOUND ENTERPRISES, INC. DBA REI - COMMUNICATIONS BARTOW, FL REL REAL PUBLIC TELEPHONE CO INC(THE) ORLANDO, FL REM VALULINE LONG DISTANCE (PREV. REAMS COMMUNICATIONS, INC.) ALBUQUERQUE, NM REN 360NETWORKS INC VANCOUVER, BC REO REO-CAP INC REP RADIO ELECTRONICS PRODUCTS CORPORATION RER REANET CORPORATION DURANGO, CO RES RADIO AND ELECTRONIC SERVICE INC RET RELIANCE TELECOMMUNICATIONS, INC. HAYWARD, CA REX RADIO EXCHANGE INC REY REYNOLDS LONG DISTANCE INC REYNOLDS, IL RFA CRC COMMUNICATIONS OF CALIFORNIA, INC. TURLOCK, CA RFB RICHARD F BLYLER RFC RFB CELLULAR INC STAMFORD, CT RFE RADIOFONE INC RFG RADIOFONO OF GEORGIA INC RFL REFLEX COMMUNICATIONS, INC. SEATTLE, WA RFM R.F. COMMUNICATIONS CATAWISSA, PA RFN RADIOFONE RFO STARFONE LONG BEACH, CA RGA RAGLAND TELEPHONE COMPANY RAGLAND, AL RGB VOICE-TEL OF CENTRAL OKLAHOMA OKLAHOMA CITY, OK RGC RG/CB ASSOCIATES LOREDO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–167 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RGD R.G. DATA INCORPORATED ROCHESTER, NY RGE RANGE TELECOMMUNICATIONS MARQUETTE, MI RGG RCC PAGING, INC. ALEXANDRIA, MN RGI RITBRIDGE COMMUNICATIONS, CO. NEW BRUNSWICK, NJ RGL REGIONAL COMMUNICATIONS INC PARAMUS, NJ RGM RGM COMMUNICATIONS HILLSBORO, NM RGN RINGGOLD TELEPHONE LONG DISTANCE, INC. RINGGOLD, GA RGO RICHLAND-GRANT LONG DISTANCE, INC. BLUE RIVER, WI RGP ROCKEFELLER GROUP TELECOMMUNICATIONS SERVICES INC NEW YORK, NY RGR RANGER CALIFORNIA SAN FRANCISCO, CA RGS RCA GLOBAL SYSTEMS PRINCETON, NJ RGT REGENT COMMUNICATIONS INC SALT LAKE, UT RGV RADIOTELEPHONE COMPANY OF GAINESVILLE RGX RGB COMMUNICATIONS, LLC SAN MARTIN, CA RGY REGENCY LONG DISTANCE PLANO, TX RHA ARCH WIRELESS HOLDINGS, INC (PREV ARCH PAGING INC.) IRVING, TX RHC REACH COMMUNICATIONS, INC. ALBANY, NY RHD RCC HOLDINGS, INC. ALEXANDRIA, MN RHM RICHMOND CONNECTIONS, INC. RICHMOND, MA RHS RESORT HOSPITALITY SERVICES, LTD HILTON HEAD, SC RHT ROCHESTER TELECOMMUNICATIONS SYSTEM ROCHESTER, MN RIA ARIANA TELECOMMUNICATION INC LOS ANGELES, CA RIB CARIBBEAN INTERNET SERVICE, CORP. SAN JUAN, PR RIC RICHMOND COMMUNICATIONS CO RICHMOND, IN RID RAPID COMMUNICATIONS, INC. (NJ) MORRISTOWN, NJ RIE ARIES NETWORK, INC. LOS ANGELES, CA RIG RIGGS COMMUNICATIONS RIH RICHON INC. DBA PAGE NORTHWEST KALISPELL, MT RIL RHINOS INTERNATIONAL LTD CO GREENVILLE, SC RIM TRI-M COMMUNICATIONS, INC. DBA TMC COMMUNICATIONS SANTA BARBARA, CA RIN RINGGOLD TELEPHONE CO. RINGGOLD, GA RIO RADIOCALL INC RIS RESERVATION & INFORMATION SYSTEMS ALTA MONTE SPG, FL RIT RIG TELEPHONES INC LAFAYETTE, LA RIV ROSEVILLE TELEPHONE COMPANY DBA RCS DIGITAL SERVICES ROSEVILLE, CA RIY TRI-COUNTY COMMUNICATIONS, INC. (NC) BELHAVEN, NC RIZ TRISTATE COMMUNICATIONS TELEPHONE COMPANY, INC. CONSHOHOCKEN, PA RJC R & J COMMUNICATIONS CO DICKINSON, ND

Proprietary — Licensed Material See proprietary restrictions on title page. 9–168 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RJM RJM COMM CLUTE, TX RJO CRJ COMMUNICATIONS, INC. HORIZON, MI RKC ROCKFORD COMMUNICATIONS INC ROCKFORD, IL RKI RENICK INFORMATION SYSTEMS INC ANAHAIM, CA RKL CROSSLINK LONG DISTANCE, COMPANY CROSSVILLE, IL RKM CRICKET COMMUNICATIONS, INC NASHVILLE, TN RKS RKS COMMUNICATIONS FORT WORTH, TX RKT ROCKY TOP ENTERPRISE RKY ROCK CANYON LD DALLAS, TX RLA RELERA, INC. DENVER, CO RLC RELAY COMMUNICATIONS CORP RLD REDWOOD LONG DISTANCE REDWOOD FALLS, MN RLG REA LONG DISTANCE DALLAS, TX RLI RADIO CALL OF LONG ISLAND INC RLK RAPID LINK U.S.A., INC. ATLANTA, GA RLL CAROTEL, LLC ROCK HILL, SC RLN CRL NETWORK SERVICES SAN FRANCISCO, CA RLO THE CARLTON GROUP, INC. MADISON, WI RLP ARIEL CORPORATION CRANBURY, NJ RLS REALIST PHILADELPHIA, PA RLT REAL-TIME SERVICES INC TAMPA, FL RLU ARMSTRONG TELECOMMUNICATIONS, INC. BUTLER, PA RLY ROBERT L COYLE, JR HOUSTON, TX RMB ROCHESTERTEL MOBILE COMMUNICATIONS ROCHESTER, NY RMC RAM COMMUNICATIONS LANSING, MI RMD RICHMOND CELLULAR RICHMOND, VA RME RAMP ELECTRONICS RMF RAMCELL OF CALIFORNIA LEXINGTON, KY RMI RAM BROADCASTING OF MICHIGAN INC SOUTHFIELD, MI RML TREMCOM INTERNATIONAL LOS ANGELES, CA RMN CRC COMMUNICATIONS OF MAINE, INC. GRAY, ME RMO RAM BROADCASTING OF MO INC RMP TRICOM MOBILE PAGING, INC. CARROLTON, KY RMR ROAMER SERVICES INC LEBANON, NJ RMS ROCKY MOUNTAIN SYSTEMS RMT ROCKY MOUNTAIN COMMUNICATIONS MISSOULA, MT RMU RMR COMMUNICATIONS, LLC DETROIT, MI RMY REINBECK MUNICIPAL TELECOMMUNICATIONS UTILITY REINBECK, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–169 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RMZ RAM TECHNOLOGIES INC ASHLAND, KY RNC RAINIER CONNECT, INC. (PREV RAINIER CABLE INC) EATONVILLE, WA RND RANDOLPH CELLULAR CORP CHARLOTTESVILLE, VA RNG RANGE CORPORATION MARQUETT, MI RNH RANDOLPH TELEPHONE MEMBERSHIP CORP ASHEBORO, NC RNK RINKERS COMMUNICATIONS RNM RAM BROADCASTING OF NEW MEXICO RNR RACC ENTERPRISES LLC ALANSON, MI RNS RCA NETWORK SERVICES INC RNV RURAL NETWORK SERVICES, INC. MIDVALE, ID RNW RCC NETWORK, INC. ALEXANDRIA, MN RNX RNK, INC DBA BUCKET OF MINUTES SHARON, MA RNY RADIUS TELECOMMUNICATIONS INC HARTFORD, CT ROA ROANOKE TELEPHONE CO INC MONROE, LA ROB TRIBAL ONE BROADBAND TECHNOLOGIES, LLC DBA ORCA NORTHBEND, OR COMMUNICATIONS ROC RADIO COMMUNICATIONS CORPORATION ROD RAGLAND LONG DISTANCE COMPANY, INC. RAGLAND, AL ROE ROSEBUD COTTON COMPANY DBA ROSEBUD TELEPHONE ROSEBUD, TX ROG ROGERS CANTEL INC SAINT-LAURENT, WB ROH RADIO COMMUNICATIONS OF OHIO MARION, OH ROI ROPIR INDUSTRIES, INC. DBA ROPIR COMMUNICATIONS MONTGOMERY, AL ROK CROCKETT TELEPHONE COMPANY, INC. MONROE, LA ROL RANDOLPH TELEPHONE TELECOMMUNICATIONS, INC. ASHEBORO, NC ROM RIO MARKETING AND COMMUNICATIONS HARLINGEN, TX RON CARRIER ONE INC ZURICH, SZ ROO SCOTT, DONALD L. & SHARI L. DBA RADIO COMMUNICATIONS ALAMOGORDO, NM ROP RADIO PAGING INC ROS RIO COMMUNICATIONS, INC. EUGENE, OR ROT RADIO PAGING AND TAS OF CHAROLETT ROU RTC COMMUNICATIONS CORP ROCHESTER, IN ROW ROBERTS WIRELESS COMMUNICATIONS, L.L.C. ST. LOUIS, MO ROY ROCK PORT TELEPHONE COMPANY ROCK PORT, MO RPA RCC OF PA INC RPC RADIO TELEPHONE COMMUNICATION OF PANAMA CITY RPD RAPID COMMUNICATIONS INC GRAND RAPIDS, MI RPE RADIO PAGE RPF RADIO PAGING INC (FORT LAUDERDALE)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–170 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RPG RADIO PAGE COMMUNICATIONS MARLTON, NJ RPH RADIO PHONE INC RPI RADIO PAGING OF ILLINOIS PEORIA, IL RPL RANDOLPH TELEPHONE COMPANY LIBERTY, NC RPM RAPID SYSTEMS TAMPA, FL RPN RADIO PHONE COMMUNICATIONS BALTIMORE, MD RPO ARAPAHOE TELEPHONE COMPANY ARAPAHOE, NE RPP CAROLINA PCS I LIMITED PARTNERSHIP GREENVILLE, SC RPQ ARCPHONE CANADA RICHMOND HILL, ON RPS RADIOPHONE OF SEDALIA SEDALIA, MO RPT RADIO PAGE OF TACOMA RPU RIPTIDE COMMUNICATIONS RICHMOND HILL, ON RRA CARRERA COMMUNICATIONS, L.P. SAN ANTONIO, TX RRC USE IAC CODE COC CHICAGO, IL RRD RANCH RADIO INC RRG RONALD ROBINSON DBA PRECISE PAGING & COMMUNICATION CO. CHICAGO, IL RRL RURAL CELLULAR COMMUNICATIONS INC LEXINGTON, KY RRM RADIO RELAY CORP - MO RRN CARR COMMUNICATIONS INC BRANCH, MI RRO RADIO RELAY CORP -OHIO RRP ROADRUNNER RADIO PAGING INC RRS RULE RADIOPHONE SVC INC RRT RADIO RELAY CORP - TEXAS RRU REMI RETAIL COMMUNICATIONS, LLC GREENSBURG, PA RRV RUBY RANCH INTERNET COOPERATIVE ASSOCIATION DILLON, CO RRY RADIO RELAY CORPORATION WESTCHESTER, IL RRZ RED FROG, L.L.C. EMDOND, OK RSA RIVERS ASSOCIATES INC RSB TRISTATE BELL INC BROOKLYN, NY RSC R.G. SOUND AND COMMUNICATIONS CELINO, OH RSD RDST INC IRVING, TX RSE CRESCENT COMMUNICATIONS INC LAS VEGAS, NV RSH RENSCHLER COMMUNICATIONS INC WACO, TX RSI RESOURCE INOVATIONS GROUP, INC. DENTON, TX RSL CROSS TELEPHONE COMPANY TULSA, OK RSM RTSC COMMUNICATIONS, INC. LENORA, KS RSN RSL COM CANADA INC VANCOUVER, BC RSO RESERVE TELEPHONE COMPANY INC RESERVE, LA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–171 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RSP RESPONSE TELECOM LP BURLINGTON, VT RSR RASERCO, INC. EL DORADO, AR RSS TRANS-ASIA TRADING, INC. SAN FRANCISCO, CA RST RESORT TELE-PAGE RSV RADIO SERVICE CO BURLEY, ID RSW REDSTONE NETWORK SERVICES LIMITED BAREHAMWOOD, EN RSX RCS INC ELK CITY, OK RSY RADIO SYSTEMS INC DALLAS, TX RTA R D THOMPSON AND ASSOCIATES RTB ROYALTEL TELECOMMUNICATIONS BROKERS NIAGARA FALLS, NY RTC FRONTIER COMMUNICATIONS INTERNATIONAL, INC.(PREV. RCI CORP) ROCHESTER, NY RTD RADIO TELEPHONE COMMUNICATION OF DAYTONA RTE RADIO TELEPHONE DUPAGE INC GLEN ELLYN, IL RTF RUNESTONE TELEPHONE ASSOCIATION HOFFMAN, MN RTG RADIO TELEPHONE COMMUNICATION OF GAINESVILLE RTH RUBICON TECHNOLOGIES & TELECOMMUNICATION NEW YORK, NY RTI TELCO HOLDINGS, INC (PREV RTI TELECOM. INC) CHANTILLY, VA RTK RTK COMMMUNICATIONS EAST ORANGE, NJ RTL RADIO TELEPHONE COMPANY OF INDIANA INC RTM RADIOTELEPHONE OF MISSISSIPPI RTN RTNT COMMUNICATIONS KENNEDALE, TX RTO R.T. COMMUNICATIONS INC. WEATHERFORD, OK RTP RADIO TELEPHONE COMMUNICATION INC RTQ REAL/TIME COMMUNICATIONS AUSTIN, TX RTR RTI COMMUNICATIONS (PREV ROYAL TELECOM INTERNATIONAL) LOS ANGELES, CA RTS RADIO TELEPHONE SERVICES RTT REPUBLIC TELECOM (PREVIOUSLY CCS) RTU R.T.O. COMMUNICATIONS, LLC. NORFOLK, VA RTV RETEVISION MADRID, SP RTX TRANS TEXAS PCS KERRIVILLE, TX RTY RESOURCE TECHNOLOGY SERVICES INC MCLEAN, VA RTZ TRI-TEL COMMUNICATIONS, INC NEW YORK, NY RUA TRULY CLEAR COMMUNICATIONS DETROIT, MI RUC CARA COMMUNICATIONS COMPANY GILBERT, AZ RUE SPRUCE COMMUNICATIONS, LP DALLAS, TX RUH RURAL TELEPHONE COMPANY GLENNS FERRY, ID RUL RURAL CELLULAR MANAGEMENT FAIRFIELD, CA RUM TRUCOMM CORPORATION INCORPORATED BUFFALO GROVE, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–172 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RUN STARONE COMMUNICATION INC. MILWAUKEE, WI RUR TRI RURAL INDEPENDENT OPERATIONS, L.L.C. DBA TRIO, L.L.C. NEW WINDSOR, IL RVA RCC OF VIRGINIA RVB RIVERBEND COMMUNICATIONS FORT WORTH, TX RVC REVENUE COMMUNICATIONS, INC. ALLEN, TX RVD RIVERSIDE LONG DISTANCE OPERATOR AUSTIN, TX RVE 3 RIVERS TELEPHONE COOPERATIVE, INC. FAIRFIELD, MT RVF RVP FIBER COMPANY, L.L.C. GRAND RAPIDS, MI RVI SAN CARLOS TELECOM, INC DBA CREATIVE INTERCONNECT SAN CARLOS, CA TELECOM RVL RESERVE LONG DISTANGE T/A RESERVE TELECOMMUNICATIONS RESERVE, LA RVO RESERVATION TELEPHONE COOPERATIVE PARSHALL, ND RVP RCN TELECOM SERVICES OF PHILADELPHIA INC. PRINCETON, NJ RVS RIVERSIDE TELEPHONE CO TULSA, OK RVT ROSEVILLE TELEPHONE COMPANY ROSEVILLE, CA RVU REVOLUTION COMMUNICATIONS COMPANY, LTD BEACHWOOD, OH RVY ROANOKE VALLEY CELLULAR TELEPHONE CO HASTINGS, NY RWB RURALWEST WESTERN RURAL BROADBAND INC SCOTTSDALE, AZ RWC CROWN CELLULAR & PAGING COVINA, CA RWE RADIO WEST LAKE CKELEN, WA RWF RWF COMMUNICATIONS, LLC. YAKIMA, WA RWG RED WING LDS RED WING, MN RWH SIGNATURE TELE., INC DBA RANDY WHITE TELECOMMUNICATIONS, DALLAS, TX INC RWK CRAW-KAN COMMUNICATION SYSTEMS, INC GIRARD, KS RWL RISWELL ENTERPRISES INC NEW HYDE PARK, NY RWO REGIONET WIRELESS OPERATIONS, LLC NEWPORT BEACH, CA RWP RAINBOW TEL. COOP. ASSN. INC. EVEREST, KS RWS ROCKWELL SIGNAL RWT RADIO COMMUNICATION COMPANY INC OF WATERLOO WATERLOO, IA RXC RAEX COMMUNICATIONS INC CANTON, OH RXM ARAX COMMUNICATIONS GLENDALE, CA RXO R TEX COMMUNICATIONS GROUP, INC. DBA RTEX COMMUNICATIONS WHITESBORO, TX RXX RCX, INC. OREM, UT RYA TRI COUNTY TELEPHONE ASSOCIATION, INC. COUNCIL GROVE, KS RYB ROCKY MOUNTAIN BROADBAND, INC. DENVER, CO RYE ROYCE’S ELECTRONICS, INC. MOAB, UT RYF RAYFIELD COMMUNICATONS SPRINGFIELS, MO RYM READY TELECOM INC ASHEBORO, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–173 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location RYN RYAN COMMUNICATIONS, INC. DUNCANVILLE, TX RYS CRYSTAL CLEAR CONNECTIONS, INC. ASHEVILLE, NC RZR REITZ RENTALS, INC. AUSTIN, TX SAA STARCOMM AMERICA INC EMMAUS, PA SAB SMART BUILDING TECHNOLOGIES LTD ISLANDIA, NY SAC SWARTLEY-AMBS COMMUNICATIONS JACKSON, MI SAD STAR DIRECT TELECOM, INC. SANTA BARBARA, CA SAE SIERRA TELEPHONE COMPANY, INC. OAKHURST, CA SAF SOUTHWESTERN BELL COMM SERV, INC DBA AMERITECH LONG PLEASANTON, CA DISTANCE SAG SCHENECTADY AIR TO GROUND CORP SAH SAVANNAH INDEPENDENT PCS CORPORATION MACON, GA SAI TRANSWORLD NETWORK CORP (PREV LONDON TELECOM NETWORK ) TAMPA, FL SAJ SA.COM INC. KITCHENER, CN SAK STATE OF ARKANSAS LITTLE ROCK, AK SAL SECURITY ALARM CO OWOSSO, MI SAM STAT COMMUNICATIONS INC HOUSTON, TX SAN WORLDCOM INC. (PREV. LDDS) TULSA, OK SAO USE IAC CODE SNB SAN DIEGO, CA SAP SPATA COMMUNICATIONS CORP. DUBLIN, OH SAQ SAVONTEL COMMUNICATIONS INC QUEENS, NY SAR STARCOM FT WORTH, TX SAS SANDWICH ISLES COMMUNICATIONS, INC. HONOLULU, HI SAT SONORA TELECOM FRESNO, CA SAU TRIVERGENT COMMUNICATIONS, INC (SUB OF STATE COMM.) GREENVILLE, SC SAV SAVENET SAW SOUTH CENTRAL WIRELESS, INC. MEDICINE LODGE, KS SAX CASCADE ACCESS LLC ESTACADA, OR SAY AMERICAN SAMOA LICENSE INCORPORATED ALPHARETTA, GA SAZ SAVONCALLING.COM LLC MIAMI, FL SBA SUBURBAN CELLULAR LLC RAPID CITY, SD SBB SBC TELECOM, INC (PREV SBC NATIONAL, INC) DALLAS, TX SBC SOUTHWESTERN BELL COM SVC INC DBA SOUTHWESTERN BELL LONG RICHARDSON, TX DISTANCE SBD THE SWITCHBOARD WOODWARD, OK SBE SMARTBEEP INC CHEASAPEAKE, VA SBG SMITH BAGLEY INC ROSWELL, GA SBH SBA BROADBAND SERVICES, INC. BIRMINGHAM, AL SBI SERVICE ELECTRIC CABLE T.V., INC. BETHLEHEM, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–174 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SBL SHERBURNE LONG DISTANCE BIG LAKE, MN SBM SOUTHWESTERN BELL MOBIL SYSTEMS INC SBN SUBURBAN CELLULAR INC DUBLIN, CA SBO STEAMBOAT COMMUNICATIONS STEAMBOAT SPRINGS, CO SBP STAR TELEPHONE MEMBERSHIP CORPORATION CLINTON, NC SBR SHOWALTER, MIKE D. LILLY SAM G DBA BLUE RIDGE HARRISONBURG, VA COMMUNICATIONS SBS SATELLITE BUSINESS SYSTEMS SBT SOUTHWESTERN BELL TELEPHONE ST LOUIS, MO SBU SKYBEST COMMUNICATIONS, INC. WEST JEFFERSON, NC SBV SOUTHWESTERN BELL VIDEO SERVICES, INC. SAN ANTONIO, TX SBX MCI/1-800-COLLECT(PREV SATELLITE BUSINESS SYSTEMS) RICHARDSON, TX SBY SOUTH BAY COMMUNICATIONS CARSON, CA SBZ SOUTHWESTERN BELL COMMUNICATIONS SVCS INC DBA SBC LONG PLEASANTON, CA DISTANCE SCA SCATS SCB SOUTHLAND CABLEVISION REDLAND, CA SCC THE SWITCH CENTER PONCA CITY, OK SCD SOUTH CANAAN LONG DISTANCE CO SOUTH CANAAN, PA SCE BROADVIEW NETWORKS, INC (PREV COMMUNITY NETWORKS, INC) LONG ISLAND CITY, NY SCF SMART CELLULAR AND COMMUNICATIONS, INC. LAKEWOOD, NJ SCG SCHERERS COMMUNICATIONS INC WORTHINGTON, OH SCH FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. ROCHESTER, NY SCI SCI COMMUNICATIONS INC SCJ SIERRA COMMUNICATIONS, INC (SUB OF BACA VALLEY TEL) DES MOINES, NM SCK SCC COMMUNICATIONS CORP BOULDER, CO SCL SEATTLE CITY LIGHT SCM SOUTHERN COMMUNICATIONS INC DBA MOBIE PHONE OF TYLER SCN SCAT COMMUNICATIONS SCO STARPAGE COMMUNICATION INC SCP SUNSET COAST PAGING BENTON HARBOR, MI SCQ SUN COMTEL INC NEW PORT RICHEY, FL SCR SANTA CRUZ RADIO TELEPHONE SCS SOUND COMMUNICATIONS SOUTH REDMOND, WA SCT SCOTT COMMUNICATIONS INC SCU SOUTHWEST COMMUNICATIONS CORP SCV SELECT COMMUNICATIONS INC. DESOTO, TX SCW SOUND COMMUNICATIONS WEST BELLEVUE, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–175 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SCX SENTENEL CALLING INC SAINT CLOUD, MN SCY SUMMIT CITY RADIO INC FT WAYNE, IN SCZ SANTA CRUZ CELLULAR TELEPHONE CO OKLAHOMA CITY, OK SDA SOUTH CENTRAL LONG DISTANCE, INC. MEDICINE LODGE, KS SDB SATELLITE DATA BROADCAST NETWORKS INC (SATNET) SDC COM SYSTEMS DBA SUNDIAL COMMUNCIATIONS TUSAN, AZ SDD TELEGLOBE USA, INC(PREV SDC CORPORATION) MCLEAN, VA SDE STATE DISCOUNT TELEPHONE HUNTSVILLE, TX SDF SCIENCE DYNAMICS CORPORATION CHERRY HILL, NJ SDG SAN DIEGO TELEPHONE COMPANY SAN DIEGO, CA SDH SANDHILL COMMUNICATIONS, LLC JEFFERSON, SC SDI TELEBEAM, INC (PREV SMART CHOICE LONG DISTANCE INC.) STATE COLLEGE, PA SDK SDK ENTERPRISES CHARLOTTE, NC SDL STANDARD LONG DISTANCE GARLAND, TX SDM SHARED TELECOM SERVICES INDIANAPOLIS, IN SDN SUPERIOR DATA NETWORK INC SCOTTSDALE, AZ SDO SADDLEBACK COMMUNICATIONS COMPANY SCOTTSDALE, AZ SDP USE IAC CODE TZB FORT LEE, NJ SDR STAR TEL OF DERITTER DERITTER, TX SDS SOUTH DAKOTA 7 CORPORATION NEW YORK, NY SDT SOUTH DAKOTA NETWORK INC SIOUX FALLS, SD SDU STATE DISCOUNT TELEPHONE LLC HUNTSVILLE, TX SDV SPARTAN DEBT SERVICES CORPORATION NORCROSS, GA SDW SHADOW COMMUNICATIONS POMPANO BEACH, FL SDX SUPER_NET INC. BROOKLYN, NY SDY TELVUE CORP (PREV SCIENCE DYNAMIC) CHERRY HILL, NJ SDZ ASCENDTEL, LLC. MOLINE, IL SEA SEARS COMMUNICATIONS NETWORK (INVALID) ARLINGTON HTS, IL SEB SOUTHEAST MOBILITY WINNFIELD, AL SEC SOUTHEAST COMMUNICATIONS SED SOUTHERN CALIFORNIA EDISON COMPANY ROSEMEAD, CA SEE SEATTLE LONG DISTANCE, INC. BELLEVUE, WA SEF SOUTHEASTERN SERVICES, INC. MACCLENNY, FL SEG SOUTHERN EAGLE ACQUISITIONS INC TAMPA, FL SEH SHENANDOAH PERSONAL COMMUNICATIONS COMPANY EDINBURG, VA SEI SOUTHEAST INDIANA CELLULAR TELCO BATESVILLE, IN SEJ CSINET INTERNET ACCESS CORPORATION LAPORTE, IN SEK SUPERTEL NETWORK INC ROCKLEDGE, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–176 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SEL SLOCUMS ELECTRONICS CORRY, PA SEM SOUTHEAST MOBILPHONE INC SEN SOUTHEASTERN NETWORK SERVICES, LLC NASHVILLE, TN SEO SACO RIVER TELEGRAPH & TELEPHONE CO. BAR MILLS, MN SEP LCI INTERNATIONAL (PREV T M SEPULVEDA INC) LOS ANGELES, CA SEQ SOUTHEAST TELEPHONE LIMITED PARTNERSHIP, LTD. PIKEVILLE, KY SER SIERRA COMMUNICATIONS SES SOUTHEAST SWITCH INC MAITLAND, FL SET STAR NET PAGING, INC. PLANO, TX SEU SOUTH CENTRAL UTAH TELEPHONE ASSOCIATION ESCALANTE, UT SEV SOUND ELEVATOR CO KIRKLAND, WA SEW SEAWAY COMMUNICATIONS MONROE, MI SEY SERVICE ELECTRIC TELEPHONE COMPANY COPLAY, PA SEZ SOGETEL, INC. QUEBEC, CN SFA SECURE-FONE AMERICA, INC SAN DIEGO, CA SFB STANDARD FEDERAL BANK TROY, MI SFC S.F.C. ENTERPRISES CORAL SPRINGS, FL SFD SAFECARD SFF STOUFFER COMMUNICATIONS, INC. GRANBY, MO SFG SUNRISE FINANCIAL GROUP, INC. NEW YORK, NY SFK SHAW FIBERLINK LIMITED CALGARY, AB SFL SAVERS FEDERAL SAVINGS & LOAN ASSOCIATION LITTLE ROCK, AR SFM SAFECOM WOODCREST LAKES, NJ SFN SOUTHLAND FIBERNET INC ATMORE, AL SFO S4 COMMUNICATIONS CORPORATION INDIANAPOLIS, IN SFR SPRINGFIELD RADIO COMMUNICATIONS INC SFS SAFEWAY SCAFFOLDS INC SFT S.F.M. & T., INC. MIAMI, FL SFV STEELVILLE LONG DISTANCE COMPANY, INC. STEELVILLE, MO SFY SUNGLOBE FIBER SYSTEMS CORPORATION SUNRISE, FL SGA THE CUSTOMER SOLUTIONS GROUP LLC AURORA, IL SGB SUNGLOBE TELECOM, INC. SUNRISE, FL SGC SOUTH GEORGIA COMMUNICATIONS SGD SCOTT COUNTY LONG DISTANCE, INC. GATE CITY, VA SGE SGM ENTERPRISES INC PLANO, TX SGG SOUTHWEST PAGING, CORPORATION HOUSTON, TX SGH SUNGATES COMMUNICATION NEW YORK, NY SGI SATELLITE GATEWAY INTERNATIONAL INC NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–177 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SGK SOUTH GEORGIA PRE-PAID TELEPHONE COMPANY, INC. BAINBRIDGE, GA SGL SIGECOM LLC FRANKLIN, MA SGM SIGMA CORPORATIONS SGN INTERCONTINENTAL COMMS CELUR INC (PREV SAGINAW CELUR TEL) FARMINGTON HLS, MI SGO SEAMLESS GEOPORT COMM INC DBA MIDDLEBURGH TELEPHONE MIDDLEBURGH, NY LONG DISTANCE SGP SIGNET PAGING RALEIGH, NC SGQ SIGMA NETWORKS INC. SAN JOSE, CA SGR SAGIR INCORPORATED ITHACA, NY SGS CASS LONG DISTANCE, INC. VIRGINIA, IL SGT STARGATE COMMUNICATIONS, INC. DALLAS, TX SGU SEGTEL INC HANOVER, NH SGV USE IAC CODE SNB SAN DIEGO, CA SGW NATIONAL GATEWAY TELECOM INC NEW YORK, NY SGX SNG COMMUNICATIONS, LLC MOLINE, IL SGY CAPROCK COMMUNICATIONS (PREV. SYNERGY TELEMANAGEMENT DALLAS, TX INC.) SGZ SAGE TELECOM, INC. ALLEN, TX SHA SHARECOM INC SHB SHEBOYGAN LDS SHEBOYGAN, WI SHC SHELCOMM BALDWIN PARK, CA SHD SHARED COMMUNICATIONS SERVICES, INC SALEM, OR SHE SHARE COM AUSTIN, TX SHG SOUTHERN HIGHLANDS COMMUNICATIONS INC BLUEFIELD, WV SHH SHARON TELEPHONE COMPANY SHARON, WI SHI SUNSHINE CELLULAR PENSACOLA, FL SHK SHAWNEELINK CORPORATION EQUALITY, IL SHL SHENANDOAH LONG DISTANCE CO EDINBURG, VA SHM SHENANDOAH MOBILE CO EDINBURG, VA SHN SYSTEM ONE OF HOUSTON HOUSTON, TX SHO CSW/ICG CHOICECOM, L.P. SAN ANTONIO, TX SHP USE IAC CODE TZB FORT LEE, NJ SHR SOUTH PLAINS ELECTRIC COOPERATIVE, INC. LUBBOCK, TX SHS SHIP TO SHORE TELEPHONE LOUISVILLE, KY SHT SCHUBERT TELCOM KENNEDALE, TX SHU ANY ONE IS OKAY (PREV. SCHUMAN COMMUNICATIONS) KENNEDALE, TX SHV SMITHVILLE TELECOM, INC ELLETTSVILLE, IN SHW COMMUNIGROUP OF K.C., INC (PREV SHOW ME LONG DISTANCE INC) BLUE SPRINGS, MO SHY SCHYLKILL MOBILE FONE INC POTTSVILLE, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–178 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SIA SIERRA COMMUNICATIONS SILVER CITY, NM SIB STATEN ISLAND TELECOM, LLC STATEN ISLAND, NY SIC SECURITIES INDUSTRY AUTOMATION CORP NY, NY SID SEI DATA, INC. DILLSBORO, IN SIE SIERRA CELLULAR OAKHURST, CA SIF STANDARD INFORMATION SERVICE CORP SANTA ANA, CA SIG SIREN COMMUNICATIONS, INC. SIREN, WI SIH SOUTHEASTERN INDIANA RURAL TELEPHONE COOPERATIVE, INC. DILLSBORO, IN SII SOFLO INTERNET SERVICES, CORP. MIAMI, FL SIK SISK COMMUNICATIONS LEVELLAND, TX SIL STATE OF ILLINOIS DEPT CENTRAL MGMT SERVICES SPRINGFIELD, IL SIM SHORTLINE SYSTEMS, INC. BALTIMORE, MD SIN SINCLAIR OIL CORP SALT LAKE CITY, UT SIO SAN ISABEL TELECOM, INC. DENVER, CO SIP UNIVANCE TELECOMMUNICATIONS, INC (PREV CSI CORP) ENGLEWOOD, CO SIQ ASIA COMMUNICATIONS INTERNATIONAL INC SAN JOSE, CA SIR DELTACOM LONG DISTANCE SERVICES(PREV.SOUTHERN ARAB, AL INTEREXCHANGE SVC) SIS U MOBILFONE SIT SI-TECH COMMUNICATIONS INC SIU 1-800-RECONEX, INC (PREV STERLING INTERNATIONAL FUNDING, HUBBARD, OR INC.) SIV SEREN INNOVATIONS, INC. MINNEAPOLIS, MN SIW BROOKINGS MUNICIPAL UTILITIES DBA SWIFTEL COMMUNICATIONS BROOKINGS, SD SIX SUITE SYSTEMS INC. CALGARY, AB SIY SELECTIVE ROYAL CORPORATION CHICAGO, IL SIZ SIRIUS TELECOMMUNICATIONS SANTA BARBARA, CA SJC SOUTH JERSEY COMMUNICATION SJE GT COM LONG DISTANCE (PREV ST. JOE COMMUNICATIONS) PORT ST JOE, FL SJH ST. JOSEPH PCS, INC WINTER PARK, FL SJL SAN JUAN LONG DISTANCE SERVICE FRIDAY HARBOR, WA SJM SMARTCOMM CORP MIAMI, FL SJV STPCS JOINT VENTURE, LLC SCOTTSDALE, AZ SKA SOUTHERN KANSAS TELEPHONE CO., INC. CLEARWATER, KS SKB SKB TELECOM WATERTOWN, NY SKC STARK COMMUNICATIONS SKE SALT LAKE TEL-A-SYSTEMS SALT LAKE CITY, UT SKG STICKDOG TELECOM, INC. VIENNA, VA SKH STAR TALK, INC. LAUDERHILL, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–179 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SKI SISKIYOU COMMUNICATIONS MOUNT SHASTA, CA SKK SK TELINK AMERICA INC FAIR LAWN, NJ SKL SASKTEL REGINA, SK SKM STOCKTON MOBILFONE SKN SATELLITE SKYPAGER INC INGLEWOOD, CA SKO SOUTH ARKANSAS TELEPHONE COMPANY INC HAMPTON, AR SKP SKYLINE TELEPHONE MEMBERSHIP CORPORATION WEST JEFFERSON, NC SKR SIGNATURE NETWORK DALLAS, TX SKS STATE OF KANSAS TOPEKA, KS SKT SKYLAND TECHNOLOGIES, INC. HELENA, MT SKU SOUTHWEST ARKANSAS TEL. COOP. INC. TEXARKANA, AR SKV SCHOLL INTERESTS., DBA COMMSERV HOUSTON, TX SKW SNAKE RIVER WIRELESS FRUITLAND, ID SKY SKYLINE COMMUNICATIONS BRYAN, TX SLA SELECTRONICS CORPORATION WAITSFIELD, VT SLC SUBURBAN LODGING CO INC SLD FRONTIER COMMUNICATIONS OF THE SOUTH INC (PREV SOUTHLAND MONROEVILLE, AL TEL CO) SLE ST LOUIS ELECTRONICS SERVICE CORP ST LOUIS, MO SLG ST LONG DISTANCE, INC. SARASOTA, FL SLH SOUTH CAROLINA PHONE LLC GREENVILLE, SC SLI SLO CELLULAR INC SAN JOSE, CA SLK SILKE COMMUNICATIONS SLL SALEM CELLULAR ONE SALEM, NJ SLM SALEM PAGING SLN SELECTNET INC DALLAS, TX SLO S L O TELECOM LTD SLP SATELLITE PAGING NEW YORK, NY SLQ STATELINE COMMUNICATIONS, INC. WEST PLAINS, MO SLR SWARTZLANDER RADIO INC SLS MCI METRO ACCESS TRANSMISSION (PREV TELECOM USA) ATMORE, AL SLT SATELLITE PAGING FAIRFIELD, NJ SLU SACO RIVER CELLULAR TELEPHONE COMPANY DBA STARCELLULAR SACO, ME SLV SILVERADO COMMUNICATIONS SLW STILLWATER CELLULAR TELEPHONE CO GUTHRIE, OK SLX SILVER LINES COMMUNICATIONS, INC LONG ISLAND CITY, NY SLY STALVEY’S GEORGETOWN, SC SLZ SLATER COMMUNICATIONS & ELECTRONICS, INC. SALEM, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 9–180 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SMA STATE OF MONTANA HELENA, MT SMB SIERRA MOBILE RADIO PORTERVILLE, CA SMC SOUTHWESTERN MOBILE COMMUNICATIONS SMD SM LONG DISTANCE (SUB SM TELECORP INC) SAN MARCOS, TX SME SATMET NEW YORK, NY SMF SCHUYLKILL MOBILEFONE INC SMG SANDSTREAM COMMUNICATIONS & ENTERTAINMENT, INC CARROLLTON, TX SMH SHO-ME TECHNOLOGIES MARSHFIELD, MO SMI SCANA COMMUNICATIONS, INC. CAYCE, SC SMJ SMARTICOM, INC. NEW YORK, NY SMK STRATOS MOBILE NETWORKS STATEN ISLAND, NY SML SAN MARCOS LONG DISTANCE INC SAN MARCOS, TX SMM SMR NETWORK PORTLAND, OR SMN SHARECOM NETWORK CO AUSTIN, TX SMO SMARTCOM TELEPHONE, LLC MCALLEN, TX SMP SPENCER MOBILEPHONE SMQ SUNTEL METRO, INC. ORLANDO, FL SMR STONE’S MOBILE RADIO INC SMS SOUTHERN MESSAGE SERVICE SMT SALISBURY MOBILE TELEPHONE SALISBURY, MD SMU SMART COMMUNICATIONS, INC. ROCHESTER, NY SMV SMITHVILLE TELEPHONE COMPANY, INC. ELLETTSVILLE, IN SMW SPRINT METROPOLTIAN NETWORKS, INC. ALTAMONTE SPRINGS, FL SMX STARTCOMM CORP MIAMI, FL SMY SATELLITE COMMUNICATION SYSTEMS, INC. HAMPTON, VA SMZ SMR SYSTEMS HOUSTON, TX SNA USE IAC CODE SNB SAN DIEGO, CA SNB FIRSTWORLD COMMUNICATIONS INC (PREV FIRSTWORLD SO CAL SAN DIEGO, CA PREV..) SNC WORLDCOM INC. (PREV. LDDS) TULSA, OK SND SNIDER TELECOM LITTLE ROCK, AR SNE STATE OF NEBRASKA LINCOLM, NE SNF SNC/UNAT LLC ANCHORAGE, AK SNG SOUTHERN NEW ENGLAND TELEPHONE (SNET) NEW HAVEN, CT SNH SUNTEL NETWORK, INC.(PREV. SUNSHINE TELEPHONE INC.) ORLANDO, FL SNI SUN-NET INC SAN ANTONIO, TX SNJ STATE OF NEW JERSEY TRENTON, NJ SNK SPRINT LOCAL TELECOMMUNICATIONS DIVISION(PREV SHARED USE KANSAS CITY, MO NETWORK)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–181 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SNL SUN TEL W PALM BEACH, FL SNM SNET AMERICA, INC. NORTH HAVEN, CT SNN EQUALNET CORPORATION (PREV PHOENIX NETWORK & SUNTEL) PHOENIX, AZ SNO SONOMA COMMUNICATIONS INC SANTA ROSA, CA SNP SNET PAGING INC NEW HAVEN, CT SNQ UNITED TELEPHONE-NORTH CENTRAL (SPRINT) MANSFIELD, OH SNR SOUTHERN RADIO-PHONE INC SNS SOUTHERNNET SYSTEMS ATLANTA, GA SNT MCI(PREV SOUTHERNET NOW MCI METRO ACCESS TRANSMISSION - RICHARDSON, TX WUA) SNU SONIC COMMUNICATIONS INC ROSWELL, GA SNV STNT SERVICES KENNEDALE, TX SNW INTERMEDIA COMMUNICATIONS INC (PREV SOUTHWEST NETWORK AUSTIN, TX SERVICES) SNX ASIAN AMERICAN ASSOCIATION EL MONTE, CA SNY STATE OF NEW YORK-EXECUTIVE DEPT OFFICE GENERAL SRVS ALBANY, NY SNZ SOUTH CAROLINA NET INC KINGSTREE, SC SOA SOUTH CANAAN TELEPHONE COMPANY SOUTH CANAAN, PA SOC STATE OF CALIFORNIA-CALNET SACRAMENTO, CA SOD STATE TELEPHONE LONG DISTANCE, INC. COXSACKIE, NY SOE STRATOS TELECOM, INC (PREV SHELL OFFSHORE SERVICES NEW ORLEANS, LA COMPANY) SOF SOFTALK INC TORONTO, ON SOG SKOWHEGAN ONLINE INCORPORATED SKOWKEGAN, ME SOH SOUTHERN OHIO COMMUNICATIONS INC WAVERLY, OH SOI IOWA COMMUNICATIONS NETWORK (PREV. STATE OF IOWA) DES MOINES, IA SOK STATE OF OKLAHOMA FINANCE OKLAHOMA CITY, OK SOL SOUTHERN OREGON LD SALEM, OR SOM SOUTHLAND OF MISSISSIPPI JACKSON, MS SON SONOMA COMMUNICATIONS SOO SIMPLE COMMUNICATIONS TECHNOLOGIES MIAMI, FL SOP SIGNAL ONE PAGING INC SAN DIEGO, CA SOR STENTOR CANADIAN NETWORK MANAGEMENT OTTAWA, CN SOS SANDELL OPERATOR SERVICE WHITE SETTLEMENT, TX SOT SOUTHEASTERN CELLULAR MILLRU, AL SOU SIOUX COMMUNICATIONS SOV SOUTHERN COMMUNICATIONS SERVICES, INC BIRMINGHAM, AL SOW USE IAC CODE EQN HOUSTON, TX SOX CASCO COMMUNICATIONS, INC. PHILOMATH, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 9–182 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SOY SOURCE ONE COMMUNICATIONS, INC. TALLAHASSEE, FL SOZ STONE & CO DALLAS, TX SPA QWEST COMMUNICATIONS CORP (PREV SOUTHERN PACIFIC DENVER, CO TELECOM) SPB SIERRA PACIFIC COMMUNICATIONS RENO, NV SPC USE IAC CODE UTC SPD SIMPLY LONG DISTANCE ST. LOUIS, MO SPE CEO TELECOMMUNICATIONS, INC (SUB OF STAR TELE.) (PREV DALLAS, TX SPECTRANET SPF SOUTHERN PACIFIC TRANSPORTATION CO SAN FRANCISCO, CA SPG SELECTIVE PAGING CORP SPH SUPERPHONE LAS VAGAS, NV SPI SOUTH PLAINS COMMUNICATIONS LUBBOCK, TX SPJ SPJ, INC ENTERPRISE, AL SPK SNIP LINK, LLC BLACKWOOD, NJ SPL SPECTRATEL INC SPM SPECTROCOM SENICIA, CA SPN SKYPHONE INC SPO ST. PIERRE COMMUNICATION NETWORK ALLEN, TX SPP SPOKANE PAGING & TELECOMMUNICATIONS SPOKANE, WA SPQ SPAN-TEL, INC. GREAT NECK, NY SPR SPENCER LDS BREWSTER, MN SPS STARPOWER COMMUNICATIONS, LLC PRINCETON, NJ SPT SOUTH PAC TRANS CO SPU SPURS INC JUPITER, FL SPV MCLEOD USA INFORMATION SERVICES INC (PREV SPLITROCK WOODLANDS, TX SERVICES INC) SPW SUPER COM MARQUETTE, MI SPX SPECTRACOM, INC. SHERIDAN, WY SPY SUPERIOR COMMUNICATIONS TECHNOLOGY CORP. BRONX, NY SPZ SPECIALIZED TELECOMMUNICATION SERVICES, INC. HAYWARD, CA SQC SEQUOIA COMMUNICATIONS SQG STONEBRIDGE COMMUNICATIONS, INC. ROSEVILLE, MN SQL SEQUEL COMMUNICATIONS, INC. SOUTH PLAINFIELD, NJ SQS SEQUEL SYSTEMS, INC. RICHARDSON, TX SQT STORM TELECOMMUNICATIONS ATLANTA, GA SQW SOURCEONE WIRELESS SCHAUMBURG, IL SRA SIERRA TELECOM AUBURN, CA SRB SORBUS FRAZER, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–183 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SRC SHAW-ROSE COMMUNICATIONS SRD SELECTIVE RADIO PAGING INC SRE SMARTEL NEW YORK, NY SRF SONICRAF INC CHICAGO, IL SRG STERLING LIMITED PARTNERSHIP (PREV STERLING CELLULAR) ROSWELL, GA SRH SIERRA TELEPHONE LONG DISTANCE OAKHURST, CA SRI SELF RADIO, INC. MONTAGUE, TX SRJ SANTA ROSA TELEPHONE COOPERATIVE, INC. VERNON, TX SRK STARLINK COMMUNICATIONS, LLC S. SAN FRANCISCO, CA SRL STAR-LINE INC HARLINGEN, TX SRM SAVANNAH RADIO MOBILE TELEPHONE INC SRN SPRINT CANADA INC. WILLOWDALE, ON SRO SUNRISE OPERATOR RICHARDSON, TX SRP STARK RADIOPHONE SRQ STAR COMMUNICATIONS INC CAPE GIRARDEAU, MO SRR SIERRA COMMUNICATIONS CORDOVA, CA SRS ST REGIS SHERATON HOTEL NEW YORK, NY SRT SOLAR TURBINE INC SAN DIEGO, CA SRU SPECTRUM COMMUNICATIONS MOSAS LAKE, WA SRV SOURIS RIVER TELECOMMUNICATIONS CO MINOT, ND SRW FIVE STAR TELECOM, INC LOS ANGELES, CA SRX STARCOM SEATTLE, WA SRY CS WIRELESS SYSTEMS INC. PLANO, TX SRZ SIERRA TELECOMMUNICATIONS INC RENO, NV SSA SHENTEL COMMUNICATIONS COMPANY EDINBURG, VA SSC SATELLITE SYSTEMS CORP SSD SUNMAN TELECOMMUNICATIONS CORPORATION LONG DISTANCE SUNMAN, IN SSE SPECIAL SERVICES RADIOFONE WEATHERFORD, TX SSF SHARE LDS SERVICES OF FAIRBAULT FAIRBAULT, MN SSG TSS DIGITAL SERVICES, L.L.C. OLYMPIA, WA SSH SCS COMMUNICATIONS & SECURITY INC DBA NORTH SANTIAM STAYTON, OR COMMUNICATION SSI SECTOR/SIAC NEW YORK, NY SSJ STSJ OVERSEAS TELEPHONE CAPARRA HEIGHTS, FL SSK SISKIYOU MOBILFONE SANTA ROSA, CA SSL COYOTE METRO, LLC (PREV SATTEL STREAMRAMP, LLC) TERRE HAUTE, IN SSM BROADWING COMMUNICATIONS SERVICES INC (PRE IXC COMM. SERV. AUSTIN, TX INC) SSN SILVER STAR TELEPHONE COMPANY, INC. FREEDOM, WY

Proprietary — Licensed Material See proprietary restrictions on title page. 9–184 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SSO SOUTH SLOPE COOPERATIVE TELEPHONE COMPANY, INC. NORWAY, IA SSP SULFUR SPRINGS TELECOM PARIS, TX SSQ SATCOM SYSTEMS, INC BOCA RATON, FL SSR SOUTH SHORE RADIO TELEPHONE INC MICHIGANCITY, IN SSS TELECOM HOUSE INCORPORATED (PREV STERLING BEVERLY HILLS, CA TELECOMMUNICATION INC) SST SOUTHERN STATES TELEPHONE INC SSU SANTA ROSA COMMUNICATIONS, INC. VERNON, TX SSV SOUTHWESTERN COMMUNICATIONS SERVICES IRVING, TX SSY SMARTLINE SYSTEMS INC ALEXANDRIA, VA STA STAR TEL TRANSMISSIONS VICTORIA, TX STB STAR BEEPERS ROMA, TX STC SUMMIT COMMUNICATIONS STD STANDARD TELECOMMUNICATIONS INC OAKBROOK, IL STE ILD TELECOMMUNICATIONS, INC (PREV WORLDCOM INC) TULSA, OK STF SUN TELSERVICES OF FLORIDA CORP FT LAUDERADALE, FL STG ST PAGING GARDEN CITY, KS STH SOUTHWESTERN COMMUNICATIONS INC STI SATELLITE TECHNOLOGY INDUSTRIES INC BELLEVUE, WA STJ TRESCOM U.S.A., INC.(PREV. TRESCOM INTERNATIONAL, CARIBBEAN FT. LAUDERDALE, FL DIV) STK STOCKTON CELLULAR STOCKTON, CA STL SHIP TO SHORE TELEPHONE CO STM SORENSON TELECOMMUNICATIONS STN SATELLITE TELEPHONE NETWORK STO STENOCALL LUBBOCK, TX STP SATELLITE PAGING CULVER CITY, CA STQ STARTEL COMMUICATIONS INC IRVING, TX STR STAR TEL STS SHENTEL SERVICE CO STT STAR TEL OF ABILENE (PREV STAR-TEL) ABILENE, TX STU STAR TOUCH COMMUNICATIONS INC ATLANTA, GA STV STARTEL VICTORIA VICTORIA, TX STW S T MICROWAVE W. COXSAKIE, NY STX USE IAC CODE SRN NORTH YORK, ON STY AVANTIS NY GERNERAL PARTNERSHIP SCHAUMBURG, IL STZ STARTEC INC BETHESDA, MD SUA USE IAC CODE UTC KANSAS CITY, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–185 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SUB SUBURBAN CONNECT, INC. OAKS, PA SUC SOUTHWEST UNITED COMMUNICATIONS INC COLLEYVILLE, TX SUD SUMRADA COMMUNICATIONS SERVICE INC EAST CONEMAUGH, PA SUE SUPERTEL COMMUNICATIONS INC SAN DIEGO, CA SUF SNET CELLULAR, INC ROCKY HILL, CT SUG SAIPAN CELLULAR & PAGING TUMON, GU SUH SOUTHNET CORP TAMPA, FL SUI SOUND INVESTMENTS UNLIMITED, INCORPORATED RIO GRANDE CITY, TX SUJ SPENCER MUNICIPAL COMMUNICATIONS UTILITY SPENCES, IA SUK SOUTHERN TELECOMMUNICATIONS COMPANY, LLC JACKSON, MS SUL SUNTEL PHILADELPHIA, PA SUM SUMMIT TELESERVICES (PREV. SUMMIT TELECOMMUNICATIONS) MYRTLE BEACH, SC SUN SERVICES UNLIMITED INC SUO SHELLSBURG TELECOMMUNICATIONS, INC SHELLEBURG, IA SUP SURE PAGE INC PEORIA HEIGHTS, IL SUQ SUSQUEHANNA MOBILE COMMUNICATIONS INC HARRISBURG, PA SUR FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC.(PREV OSHKOSH, WI SUPERIOR) SUS USE IAC CODE FED TULSAIX, OK SUT SUNCOAST COMMUNICATIONS INC SARASOTA, FL SUU SUPRA TELECOMMUNICATIONS AND INFORMATION SYSTEMS, INC. CORAL GABLES, FL SUV SBC ADVANCED SOLUTIONS, INC. SAN ANTONIO, TX SUW SWEETSER RURAL TELEPHONE CO. SWEETSER, IN SUX SUN COMMUNICATIONS INC DALLAS, TX SUY SECURITY AND COMMUNICATIONS LEWISTON, ID SUZ SPECTRUM TELECOM SERVICES INC MCALLEN, TX SVA SAVECOM INTERNATIONAL, USA, INC. HAYWARD, CA SVC SUN COUNTRY COMMUNICATION SVD SILVERADO COMMUNICATIONS CORP ENGLEWOOD, CO SVE STAR TELECOMM. INC DBA ALLSTAR TELECOM (PREV DBA STAR SANTA BARBARA, CA VENDING ) SVH SPRING VALLEY TELEPHONE LONG DISTANCE, INC. SPRING VALLEY, WI SVI SILVIA LD WYLE, TX SVL OPTICOM (PREV. ONE CALL COMMUNICATIONS) TERRA HAUTE, IN SVM SIOUX VALLEY COMMUNICATIONS SIOUX CITY, IA SVN SAVEMORE NETWORK RICHARDSON, TX SVO SILVER COMMUNICATIONS INTL SAYREVILLE, NJ SVP SIOUX VALLEY PAGING INC SVR METRO MEDIA TELECOMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 9–186 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SVS SAVERS INC (SUB SAVERS FEDERAL SAVINGS & LOAN) LITTLE ROCK, AR SVT 7-TEL INC PROYER, OK SVU ACC OF OHIO CORPORATION (PREV SEVEN CELLULAR CORPORATION) NEW YORK, NY SVV USE IAC CODE USX SEATTLE, WA SVX STENTOR CORPORATION FORT LAUDERDALE, FL SVY SUN VALLEY PAGING SVZ SERVISENSE.COM, INC. NEWTON, MA SWA SOFTWARE AMERICA, INC. MONTEREY, CA SWB USE IAC CODE IOX WITCHITA, KS SWC SOUTHWEST COMMUNICATIONS SWD SOUTHWEST RADIO PAGING, INC. RICHLANDS, VA SWE SOUTHWEST COINTEL COMMUNICATIONS ABILENE, TX SWF SWIFF-TRAIN COMMUNICATIONS SAN ANTONIO, TX SWG SWIFT GLOBAL COMMUNICATIONS INC GLEN HEAD, NY SWH SWITCH 2000 OSSIO, MN SWI SOUTHWEST INTERCONNECT SWJ SWIFTTEL COMMUNICATIONS, INC. VIDALIA, GA SWK SOUTHERN TELCOM NETWORK INC MTN HOME, AR SWL SOUTHWESTERN BELL TELECOM RICHARDSON, TX SWM SOUTHWEST MOBILE SWN SOUTHWEST NET CORPORATION ABILENE, TX SWO SWISSCOM NORTH AMERICA, INC. WASHINGTON, DC SWP SOUTHWESTERN BELL PERSONAL COMMUNICATIONS INC ST LOUIS, MO SWQ SOUTHWEST PCS, LP OKLAHOMA CITY, OK SWR SOUTHWEST MICRONET INC HOUSTON, TX SWS SWITCHLESS RESELLER SERVICES OKLAHOMA CITY, OK SWT SOUTHWEST COMMUNICATIONS SWU SUNWEST COMMUNICATIONS, INC. COLORADO SPRINGS, CO SWV SOUTHWESTERN BELL SERVICES LITTLE ROCK, AR SWW SHAWNEE TELEPHONE COMPANY EQUALITY, IL SWX SOUTHWEST TEXAS LONG DISTANCE COMPANY (PREV SOUTHWEST ROCKSPRINGS, TX TEXAS COMM) SWY SWISHER TELEPHONE COMPANY SWISHER, IA SWZ SUMMIT WIRELESS, LLC. JACKSON, MS SXA SNAPPY PHONE OF TEXAS, INC. SHREVEPORT, LA SXC SIOUX CITY CELLULAR SERVICE SIOUX CITY, IA SXL SIOUXLAND TELECOM ALCESTER, SD SXM SOUTH TEXAS COMMUNICATIONS SAN BENITO, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–187 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location SXP SOUTH TEXAS PAGING, INC. DALLAS, TX SXT STANTON TELECOM INC STANTON, NE SXU SUPERIOR TECHNOLOGIES, INC DBA SUPERIOR SPECTRUM, INC. MARQUETTE, MI SYA SISKIYOU COMMUNICATIONS, INC. ETNA, CA SYC SYRACUSE TELEPHONE CO SYRACUSE, NY SYD SYNDEO CORPORATION CUPERTINO, CA SYE C-SYSTEMS, INC COEUR D’ALENE, ID SYG SYGNET COMMUNICATIONS YOUNGSTOWN, OH SYH SKYCOMM TECHNOLOGIES, INC. HUMBLE, TX SYI SUPREME TELECOM SYSTEMS, INC. FORT WORTH, TX SYK SYKES SUNNYVAIL, CA SYL SYRACUSE CGSA LIMITED PEARL RIVER, NY SYM SYMTECH COMMUNICATIONS SERVICES HUNTINGDON VALLEY, PA SYN SYNERGISTIC COMMUNICATIONS KING OF PRUSSIA, PA SYO STARWAY COMMUNICATIONS INC BUFFALO, TX SYP SIMPLY CELLULAR AND TELEPHONE, LLC PORTLAND, OR SYR SYRACUSE RADIO CALL GENERAL COMMUNICATIONS INC SYS SEIKO COMMUNICATION OF AMERICA(PREV SEIKO TELECOM. BEAVERTON, OR SYSTEMS, INC.) SYT SKYTEL (DBA SKYPAGER INC) JACKSON, MS SYU SISKIYOU TELEPHONE CO FORT JONES, CA SYV SKY ISLAND SERVICES, INC. SAFFORD, AZ SYW CSTC, LLC RENSSELAER, NY SYX SNA TELECOM, INC. LOUISVILLE, CO SYY SCARSDALE SECURITY SYSTEMS, INC SCARSDALE, NY SYZ SYSTEMS 1000 CLAREMONT, CA SZC NEXTEL COMMUNICATIONS,INC (PREV SMART SMR OF CALIFORNIA RESTON, VA INC) SZH STAR TELEPHONE COMPANY, INC. BATON ROUGE, LA SZN SPHERA OPTICAL NETWORKS N.A., INC. NEW YORK, NY SZP SPRINT CELLULAR CHICAGO, IL SZT ZTS INC CAPE GIRARDEAU, MO SZU SOUTHTEL CORP SAN ANTONIO, TX SZV SPHERA OPTICAL NETWORKS (VIRGINIA) N.A., INC NEW YORK, NY TAA TELAMARKETING COMMUNICATIONS OF ATLANTA ATLANTA, GA TAB TELECOMMUNICATIONS ACCESS FOR COMM. IMPAIRED PERSEONS SAINT PAUL, MN BOARD TAC TEL-AMERICA COMMUNICATIONS SERVICES INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–188 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TAD NORLIGHT TELECOMMUNICATIONS, INC(PREV TADLOCK’S DULUTH, MN COMMUNICATIONS) TAE TELAMARKETING COMMUNICATIONS OF TRI-STATE CHATANOOGA, TN TAF TELECOMMUNICATIONS CORPORATION OF AMERICA, INC. HARFORD, CT TAG WORLDCOM INC (PREV. TARGET TELECOM INC) TULSA, OK TAH TOUCH AMERICA HELENA HELENA, MT TAI TELEMARKETING COMMUNICATIONS OF INDIANAPOLIS TAJ TCAST COMMUNICATIONS, INC. LOS ANGELES, CA TAK TELEPHONE ASSOCIATES SUPERIOR, WI TAL TOTAL AVAILABILITY SERVICES INC TAM TELAMARKETING COMMUNICATIONS INC LOUISVILLE, KY TAN TELEPHONE ANSWERING SERVICE OF TAUNTON TAO TELAMCO TAP THE ATLANTIC-PACIFIC TELECOMMUNICATIONS ENTERPRISES CORP TAQ THE ATLANTA LINE CONYERS, GA TAR TELAMARKETING COMMUNICATIONS OF ARKANSAS TAS TOUCH AND SAVE TAT TELAMARKETING COMMUNICATIONS OF CHARLOTTE CHARLOTTE, NC TAU TEX-NET INC AUSTIN AUSTIN, TX TAV TELEMARKETING COMMUNICATIONS OF SAVANNAH TAW TELEPHONE ANSWER SVC INC TAX TRANSACTION NETWORK SERVICES INC(PREV PSINET TRANSACTION RESTON, VA SOLU..) TAY TAYLOR TEL COORP MERKEL, TX TAZ TASI INC TBA ROBERT HUEBNER DBA TALK BACK ARKANSAS FORT SMITH, AR TBB TIE/COMMUNICATIONS, INC. OVERLAND PARK, KS TBC THUMB CELLULAR PIGEON, MI TBD TWIN LAKES TELEPHONE COOPERATIVE CORPORATION GAINESBORO, TN TBE EQUALNET CORPORATION (PREV T.B. ENTERPRISES) ARLINGTON, TX TBF TELAMARKETING COMMUNICATIONS OF BAKERSFIELD (NOW TMC BAKERSFIELD, CA COMM-TVT) TBG USE IAC CODE QCC BOWLING GN, KY TBH TECH TELEPHONE COMPANY, LTD LUBBOCK, TX TBI TELEBERMUDA INTERNATIONAL LIMITED (PREV TELEPHONE CO HAMILTON, BM BILLING) TBJ TELEFONIA INALAMBRICA DE NORTE (TELINOR) MONTERREY, XL TBK TELE DANMARK USA INC WHITE PLAINS, NY TBL INMATE CALLING SERVICES ENGLEWOOD, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–189 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TBM TOUCHTONE COMMUNICATIONS 2000 LTD VANCOUVER, BC TBN TELCO OF BATON ROUGE INC BATON ROUGE, LA TBO TCI TELEPHONY SERVICES OF CONNECTICUT, INC. BERLIN, CT TBP TELEBEEP INC TBQ TELECABLE NORFOLK, VA TBR TELAMARKETING COMMUNICATIONS OF BATON ROUGE BATON ROUGE, LA TBS TELEPHONE BUDGETING SERVICES INC TBT TELEPORT COMMUNICATIONS BOSTON BOSTON, MA TBU TELEPHONE BUSINESS SYSTEMS TBV TEL-A-VOICE COMPANY INC. CENTRALLA, IL TBW TWIN CITIES COMMUNICATIONS MIDLAND, TX TBX TELEBEEPER OF NEW MEXICO ALBUQUERQUE, NM TBY TELABILITY, INC. EAST ISLIP, NY TBZ TATO’S BEEPERS, INC. GARDNER, MA TCA TEL CAR INC TCB TWIN CITY BEEPERS INC TCC TELECONNECT CO CEDAR RAPIDS, IA TCD TEL-CAR OF DAYTONA TCE THE CARTER ORGANIZATION NEW YORK, NY TCF TELETRON COMMUNICATIONS ELECTRONICS COOS BAY, OR TCG THE CONTINENTAL GROUP TCH TELECHOICE TCI TELECOMPUTER INC TCJ TOTAL COMMUNICATION SERVICES, INC. CEDAR RAPIDS, IA TCK TELECHECK NORTHWEST INC SEATLE, WA TCL TEL-CALL SYSTEMS INC TCM TRI COUNTY MOBILFONE TCN TELEPHONE COMMUNICATIONS INC LANSING, MI TCO THE COMMUNICATIONS CENTER INC TCP TEL-CAR OF PANAMA CITY TCQ TEL-CENTRAL OF JEFFERSON CITY JEFFERSON CTY, MO TCR TEL-CAR CORP TCS T C S NETWORK SERVICES TCT TRI-CITIES TELEPHONE CO TCU TOLL COMMUNICATIONS TCV TEL-PAGE OF CLEVELAND INC TCW TEL-CALL SYSTEMS INC HOMESTEAD, FL TCX TELAMARKETING COMMUNICATIONS OF COLUMBIA COLUMBIA, SC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–190 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TCY TOWN AND COUNTRY COMMUNICATIONS TCZ TELAMARKETING COMMUNICATIONS OF CO SPRINGS CO SPRINGS, CO TDA USE IAC CODE TED GRAND RAPIDS, MI TDB TRANSWORLD TELECOM, LLC NEW YORK, NY TDC TELSADE COMMUNICATIONS SPRINGVILLE, IL TDD USE IAC CODE WUA CEDAR RAPIDS, IA TDE TELEDATA INTERNATIONAL INC ATLANTA, GA TDF TMC WORLDWIDE, INC. SAN DIEGO, CA TDG EMERITUS COMMUN INC (PREV TELCO COMM GROUP INC DBA DIAL & CARROLLTON, TX SAVE) TDH TMC/AMERICA INC (PREV TELEMARKETING COMMS AMERICA) BEDFORD, TX TDI TELEPHONE NETWORK DESIGNS INC DALLAS, TX TDJ S.N.S. SHARED NETWORK SERVICES INC.(PREV TRANSACT DATA MISSISSAUGA, ON SERVICES) TDK TELNET OF DICKINSON INC. DICKINSON, ND TDL USE IAC CODE ICG ENGLEWOOD, CO TDM TDMT LTD INC SYRACUSE, NY TDN TELCON DIGITAL NETWORK ALAMEDA, CA TDO TODCO TDP TELAMARKETING COMMUNICATIONS OF DAVENPORT DAVENPORT, IA TDQ USE IAC CODE DTC TOLEDO, OH TDR TELAMARKETING COMMUNICATIONS OF TIDEWATER TIDEWATER, VA TDS TELEPHONE ASSOCIATES LONG DISTANCE DALUTH, MN TDT ROCHESTER TEL TELECOMMUNICATIONS GROUP(PREV. TACONIC CHATHAM, NY LONG DIST.) TDU TRIAD CELLULAR MENLO PARK, CA TDV TELAMARKETING COMMUNICATIONS OF DENVER DENVER, CO TDW TELE-TREND COMMUNICATIONS, L.L.C. ENGLEWOOD, CO TDX CABLE & WIRELESS COMMUNICATIONS (FMLY TDX SYSTEMS) VIENNA, VA TDY USE IAC CODE TZB FORT LEE, NJ TDZ TELCO DATANET DALLAS INC DALLAS, TX TEA TEL-AIR COMMUNICATIONS TEB TELECARE, INC. NOBLESVILLE, IN TEC TELEPHONE EXPRESS TED LCI INTERNATIONAL (PREV TELEDIAL AMERICA) MICHIGAN, MI TEE TELCOM EQUIPMENT CORP TEF TELEC INC. REDFORD, MI TEG TELEPAGE INC TEH TELMATCH TELECOMMUNICATIONS FLORENCE, SC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–191 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TEI TELE SYS INC TEJ TELCOM NETWORK, INC. SAN DIEGO, CA TEK TEK COMMUNICATIONS, INC. (PREV. TELECOMPUTE CORPORATION) WASHINGTON, DC TEL TELESHARE INC OF LAS VEGAS TEM MCI METRO ACCESS TRANSMISSION (PREV SOUTHERNENT TELECOM*USA) TEN TELESPHERE COMMUNICATIONS INC (NOW WILTEL - WTL) OAKBROOK, IL TEO TEL-COM TEP TRI TEL COMMUNICATIONS (FMLY TMC OF EL PASO) EL PASO, TX TEQ TELEMARKETING COMMUNICATIONS OF AMERICA INC BEDFORD, TX TER TEL-CENTRAL COMMUNICATIONS INC OKLAHOMA CTY, OK TES TELSTAR INC TET WORLDCOM INC. (PREV. LDDS) TULSA, OK TEU TELEPHONE U S A TEV TELEMARKETING COMMUNICATIONS OF EVANSVILLE EVANSVILLE, IN TEW TEC-WEST COLORADO SPGS, CO TEX TRACE COMMUNICATIONS INC FLORENCE, AL TEY TELEMONEY SERVICES LAKEWOOD, OH TEZ TEL-COM INC LEBANON, PA TFA TRANS NATIONAL TELECOMMUNICATIONS, INC. SAN ANTONIO, TX TFB WORLDCOM INC. (LDDS) TULSA, OK TFC TELEFONICA LARGA DISTANCIA SAN JUAN, PR TFD TELEFIND CORP HOUSTON, TX TFE TELEFONOS DEL NOROESTE, S.A. DE C.V. TIJUANA, XB TFF TARIFF RESEARCH CORP FENTON, MO TFG THE FURST GROUP, INC. SHAMONG, NJ TFH TELENET INCORPORATED CHICAGO, IL TFI TRIUMPH COMMUNICATIONS & FIBER SERVICES INC. NEW YORK, NY TFJ TALLAHASSEE TELEPHONE EXCHANGE INC TALLAHASSEE, FL TFK TELEPACIFIC NETWORK, INC. TAMUNING, GM TFL THIEF RIVER FALLS LONG DISTANCE THIEF RIVER FALLS, MN TFM TELECOMMUNICATIONS FACILITIES MANAGEMENT INC TFN THE FONE COMPANY LONGBEACH, CA TFO TELEMARKETING COMMUNICATIONS OF FRESNO (NOW TMC COMMS - LOUISVILLE, KY TVT) TFP TFC OPERATOR SERVICES INC JACKSON, MS TFQ PRISM COMMUNICATION SERVICES, INC (PREV TRANSWIRE EDISON, NJ COMMUNICATIONS) TFR TELEPORT COMMUNICATIONS GROUP OF SAN FRANCISCO SAN FRANCISCO, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–192 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TFS THE FASHION STATION TFT THRIF-TCOMM TELECOMMUNICATIONS SERVICES, INC. LANCASTER, PA TFU TELEPACIFIC COMMUNICATIONS LOS ANGELES, CA TFV TELAMARKETING COMMUNICATIONS OF FAYETTEVILLE FAYETTEVILLE, NC TFW TELAMARKETING COMMUNICATIONS OF FT WAYNE FT WAYNE, IN TFX TRITON COMMUNICATIONS OF TEXAS L.L.C. ABILENE, TX TFY WORLDCOM INC (PREV THRIFTY TELE EX DBA OHIO DIGITAL ACCESS) TULSA, OK TFZ TELE-ONE COMMUNICATIONS INC TYLU, TX TGA TELEPAGE OF ARKANSAS INC LITTLE ROCK, AR TGB TELNET GLOBAL COMMUNICATIONS PHILADELPHIA, PA TGC TELAMARKETING COMMUNICATIONS OF MEMPHIS BIRMINGHAM, AL TGD THE LONG DISTANCE PARTNERSHIP, L.P. BURLINGTON, VT TGE TEL-PAGE INC TGF TESS COMMUNICATIONS, INC. EVERGREEN, CO TGG TELE-BEEP PAGING COMPANY BISMARCK, ND TGH TELECORP HOLDING CORP. INC. WASHINGTON, DC TGI TRANS GLOBAL COMMUNICATIONS INC. NEW YORK, NY TGJ TELESELECT GROUP INC TUCSON, AZ TGK TELSTRA ESAT BRUNSWICK, NJ TGL TELEMARKETING COMMUNICATIONS OF GREATER ILLINOIS OAKBROOK TER, IL TGM TELE-GLOBAL COMMUNICATIONS, INC. ROME, NY TGN POWERCOM CORPORATION (PREV TCC COMMUNICATIONS INC ) BEAVER DAM, WI TGO TELAMARKETING OF CHICAGO CHICAGO, IL TGP TELEGROUP INC FAIRFIELD, IA TGQ TELEPORT COMMUNICATIONS GROUP PHOENIX, AZ TGR WORLDCOM INC. (PREV. LDDS DBA TMC OF SOUTHWEST FLORIDA) TULSA, OK TGS TELEPORT COMMUNICATIONS GROUP OF LOS ANGELES LOS ANGELES, CA TGT TELEGRATION, INC. TROY, MI TGU TELEGLOBE USA INC. MCLEAN, VA TGV TEL-CAR OF GAINESVILLE TGW TERN WIRELESS LP EAST STROUDSBURG, PA TGX TGEC COMMUNICATIONS CO., LLC SAN FRANCISCO, CA TGY TECHNOLOGY ASSOCIATES TGZ TARGUS INFORMATION CORPORATION VICTOR, NY THA TOUCH AMERICA, INC. MISSOULA, MT THB COLOTEL, LLC (PREV TELEHUB NETWORK SERVICES CORPORATION) GURNEE, IL THC THE HEADQUARTERS COMPANIES INC THD TOUCH TEL CORP. BURLINGAME, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–193 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location THE TOTAL TELEPHONE, INC. OF UTAH NORTH SALT LAKE, UT THF THRIFTY TELEPHONE EXCHANGE BEAVERTON, OR THG ECI LONG DISTANCE SERVICES (PREV THINGS INC) TULSA, OK THH COSERV BROADBAND SERVICES (PREV TELEPHONE PLUS) CORINTH, TX THI TELEHOP COMMUNICATIONS INC NEWMARKET, ON THJ THOMPSON COMMUNICATIONS, INC. SPOKANE, WA THK TCHAIKOSKY TELCOM KENNEDALE, TX THL THRIFTLINE INC HARLINGEN, TX THM TELEPHONE MANAGEMENT CORP PORTLAND, OR THN TELEMARKETING COMMUNICATIONS OF HOUSTON CHARLESTON, WV THO TELEPORT COMMUNICATIONS HOUSTON HOUSTON, TX THP THE CORCORAN GROUP MINNEAPOLIS, MN THQ TELAMARKETING COMMUNICATIONS OF W VIRGINIA CHARLESTON, WV THR THE HOTEL ROANOKE THS TELCO OF NATCHITOCHES INC THT TAHOE TELEPHONE CO ZEPHYR COVE, NV THU TELESPHERE OF HOUSTON HOUSTON, TX THV TCI TELEPHONY SERVICES OF CALIFORNIA, INC. ENGLEWOOD, CO THW TEL-CAR OF HOLLYWOOD THX SOUTH TEL INC THOMASTON, GA THY THE HALEY CORP NEW YORK, NY THZ TELEPHONE COMMUNICATIONS CORP VAIL, CO TIA TELECOM AMERICA AVENTURA, FL TIB TELHAWAII, INC. NAALEHU, HI TIC TELEMARKETING COMMUNICATIONS OF TRI-CITIES KINGSPORT, TN TID TMC OF SOUTH CENTRAL INDIANA BLOOMINGTON, IN TIE CIERA NETWORK SYSTEMS, INC (PREV EQUALNET CORPORATION) HOUSTON, TX TIF TPC INFORMATION SYSTEMS INC. DANBURY, CT TIG TIGON CORP DALLAS, TX TIH TELE-LINK OF IDAHO LLC MEDIDIAN, ID TII TSI INC COLUMBIA, SC TIJ TELONE TELECOMMUNICATIONS, INC. PASADENA, TX TIK TEL-LINK, LLC ATLANTA, GA TIL TELE COMMUNICATIONS INTERNATIONAL LOS ANGELAS, CA TIM TIME WARNER COMMUNICATIONS AUSTIN, TX TIN TESTCO INC TIO TRESCOM U.S.A., INC.(PREV. TOTAL TELECOMMUNICATIONS INC) FT. LAUDERDALE, FL TIP LOWE, LEWIS L DBA TRIPLE L COMMUNICATIONS BUENA VISTA, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–194 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TIQ WORLDCOM (PREV TRI-TEL COMMUNICATIONS) MUNSTER, IN TIR TRINET CORNELIA, GA TIS TCI SERVICES INC AUSTIN, TX TIT TACONIC TELCOM CORP. CHATHAM, NY TIU TREAS RESOURCES INTL. CORP./DBA TRI COMMUNICATIONS COEUR D’ALENE, ID NETWORK TIV TEXAS DIAL TONE, INC. SAN ANTONIO, TX TIW TIME WARNER CONNECT ENGLEWOOD, CO TIX WORLD ACCESS COMMUNICATIONS CORP. (PREV. TSI TELECOM. SVC. MIAMI, FL INC.) TIY TRIPLE CROWN INDUSTRY SANTA ANA, CA TIZ TEL-COM INC MARSHALL, TX TJA TELEMAXX COMMUNICATIONS LLC CLEVELAND, OH TJB TW WIRELESS, L.L.C. DENVER, CO TJC TELENATIONAL COMMUNICATIONS OMAHA, NE TJD TELIDENT INC. MINNEAPOLIS, MN TJE TELECOM NETWORK SYSTEMS INTERNATIONAL, INC. MIAMI, FL TJF TRUCOM CORPORATION NEW YORK, NY TJG THOUSAND ISLANDS COMMUNICATIONS COMPANY, L.L.C. CLAYTON, NY TJH TIPTON CONSTRUCTION CO OF TX INC DBA ADVANCED HOUSTON, TX COMMUNICATING TECH. TJI TCI TELEPHONY SERVICES OF ILLINOIS, INC. ARLINGTON HEIGHTS, IL TJJ THE EMPIRE DISTRICT ELECTRIC COMPANY JOPLIN, MO TJK TRITON COMMUNICATIONS L.L.C. RICHARDSON, TX TJL TELIA NORTH AMERICA, INC. MCLEAN, VA TJM THRUCOMM INC. FAIRFIELD, OH TJN TELEPHONE RESTORATION NETWORK, INC. DBA TELNET PORTLAND, OR TJO TELNET COMMUNICATIONS, L.L.C. MORRISTOWN, NJ TJP TRITON CELLULAR PARTNERS OF FERRY LLC WENATCHEE, WA TJQ TC3 TELECOM, INC ADRIAN, MI TJR TELECARD INTERNATIONAL, INC. JACKSON HEIGHTS, NY TJS TESCO TELECOMMUNICATION ENGINEERING SERVICES CO MILL VALLEY, CA TJT 2JT TELECOMMUNICATIONS HENDERSON, TX TJU TELSCAPE USA INC HOUSTON, TX TJV TELEMARKETING COMMUNICATIONS OF JACKSONVILLE JACKSONVILLE, FL TJW TRANSWIRE, LLC NEW YORK, NY TJX TEXAS COMMUNICATIONS OF AUSTIN INC AUSTIN, TX TJY TTE OF NEW JERSEY CHERRY HILL, NJ TJZ TELNET WORLDWIDE, INC BIRMINGHAM, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 9–195 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TKA TELALASKA LONG DISTANCE, INC. ANCHORAGE, AK TKB TRANSAMERICAN TELEPHONE, INC. DENTON, TX TKC T K COMMUNICATIONS INC TKD TELKOM SA, LTD PRETORIA, SA TKE TELAMARKETING COMMUNICATIONS OF CLEVELAND CLEVELAND, OH TKF TELECONOMICO USA, INC THE WOODLANDS, TX TKG TEXAS NETWORKING, INC. AUSTIN, TX TKH TEXAS HOMETEL, INC. DBA 877-RING AGAIN DALLAS, TX TKI TELECOMMUNICATIONS AT LOW KOST INC TKJ TII INCORPORATED LOS ANGELES, CA TKK TELETEK EAST GRAND RAPIDS, MI TKL TELAMARKETING CORP OF LOUISIANA BATON ROUGE, LA TKM TOTAL RISK MANAGEMENT, INC. KANSAS CITY, MO TKN TALTON STC, INC. SAN ANTONIO, TX TKO TELSTAR TELECOM LLC TEMPE, AZ TKP WORLDXCHANGE CORP (PREV T&S COMMUNICATIONS, LLC) SAN RAFAEL, CA TKQ TALKSTAR.COM, INC. MENLO PARK, CA TKR TRI TEL, INC. BASIN, WY TKS TEKSTAR COMMUNICATIONS, INC GOLDEN VALLEY, MN TKT TALK TIME SCOTTSDALE, AZ TKU TELCOM OF AMERICA, INC BENSALEM, PA TKV TELAMARKETING COMMUNICATIONS OF KNOXVILLE KNOXVILLE, TN TKW TEKBILT WORLD COMMUNICATIONS, INC. DBA TWC DIRECT HUNTINGDON VALLEY, PA TKX TELECONEX PENSACOLA, FL TKY TRANSIT NETWORKS, LLC NEW YORK, NY TKZ TWISTER COMMUNICATIONS NETWORK INC CONROE, TX TLA TEL-A-PAGE INC TLB TRAIL BLAZER SYSTEMS TLC TELECALL INC TLD THE LONG DISTANCE TELEPHONE CO TLE TELECOM INC TLF TELEMARKETING COMMUNICATIONS OF LAFAYETTE LAFAYETTE, LA TLG TELCOM LONG DISTANCE TLH TELEMARKETING COMMUNICATIONS OF TALLAHASSEE TALLAHASSEE, FL TLI TEL-TOLL INC BAKERSFIELD, CA TLJ TELETOUCH TYLER, TX TLK TELE-LINK INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–196 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TLL TELPAGE LTD TLM TELCOM CORPORATION TLN USE IAC CODE UTC OREM, UT TLO TEL-PAGE OF ORANGEBURG TLP TEL-PAGE CORP OF WISCONSIN TLQ TOLL COMMUNICATIONS CONSULTANTS INC SPOKANE, WA TLR TELANSWER RADIOPHONE TLS T S COMMUNICATIONS SPRINGFIELD, IL TLT TEL-PAGE OF TENNESSEE INC TLU TELAMARKETING COMMUNICATIONS OF SHREVEPORT SHREVEPORT, LA TLV TELEMARKETING COMMUNICATIONS OF LOUISVILLE LOUISVILLE, KY TLW TELEPHONE CONNECTION OF LOS ANGELES INC MARINE DEL REY, CA TLX LCI INTERNATIONAL (PREV TELAMARKETING COMMUNICATIONS OF LEXINGTON, KY LEXINGTON TLY TEL-SYSTEMS INC ALBUQUERQUE, NM TLZ TELECOM SERVICES CORP BROOKFIELD, WI TMA TRANSAMERICA MANAGEMENT LOS ANGELES, CA TMB TEL-CAR OF MELBOURNE TMC TELECOMMUNICATION SERVICES CORPORATION BROOKFIELD, WI TMD TELAMARKETING COMMUNICATIONS OF MADISON MADISON, IN TME TEAM ELECTRONICS TMF TEXOMA MOBILFONE TMG TEL-MANAGEMENT CORP DALLAS, TX TMH TELAMARKETING COMMUNICATIONS OF HUNTSVILLE HUNTSVILLE, AL TMI TELEMARKETING COMMUNICATIONS OF MIAMI MIAMI, FL TMJ TMI COMMUNICATIONS OTTAWA, ON TMK TELCOM ONE NEW YORK, NY TML TRI-CITY MOBILE PHONE CO TMM TELAMARKETING COMMUNICATIONS OF MILWAUKEE MILWAUKEE, WI TMN MCI METRO ACCESS TRANSMISISON (PREV TELECOM*USA) TMO TELAMARKETING COMMUNICATIONS OF MOBILE MOBILE, AL TMP TRIPLE S MOBILPHONE INC TMQ TELECOM MGMT INTERNATIONAL INC INDEPENDANCE, MO TMR T D MILLER III RADIO COMMUNICATIONS INC TMS TELEPHONE MANAGEMENT SYSTEMS INC TMT TELEMART COMMUNICATIONS TMU TEL AMERICA INC AKA EXTELCOM DBA EXPRESS TEL SALT LAKE, UT TMV TELAMARKETING COMMUNICATIONS OF MERRILVILLE MERRILVILLE, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–197 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TMW T-NETIX, INC.(PREV. TELE-MATIC CORP) ENGLEWOOD, CO TMX TACOMA TELEPHONE EXCHANGE TACOMA, WA TMY TELEMARKETING COMMUNICATIONS OF MONTEREY MONTEREY, CA TMZ TMC-MARSCH TNA TELECOMMUNICATIONS NETWORK OF AMERICA INC TNB TELECOMONE MCLEAN, VA TNC WORLDCOM INC. ( PREV. LDDS) TULSA, OK TND TELCOM OF CANADA (NOW STENTOR -- SOR) OTTAWA, ON TNE TONE COMMUNICATIONS SERVICE TNF TNTSA COMMUNICATIONS KENNEDALE, TX TNG TNT, INC. (TOTAL NATIONAL TELECOMMUNICATIONS, INC.) HOUSTON, TX TNH TELENET COMMUNICATIONS LEWISVILLE, TX TNI TELAMARKETING COMMUNICATIONS OF NW INDIANA MUNSTER, IN TNJ TELEMARKETING COMMUNICATIONS OF NJ CHERRY HILL, NJ TNK THE NETWORK TNL TELEMARKETING COMMUNICATIONS OF NASHVILLE (SEE ADG) NASHVILLE, TN TNM TRANSAMERICA COMMUNICATIONS INC BOCA RATON, FL TNN TRANSNATIONAL NETWORK INC TNO WORLDCOM INC. (PREV. LDDS) TULSA, OK TNP TOPPER ENTERPRISES HOLIGEN, TX TNQ TENNECO INC HOUSTON, TX TNR TSACONAS CELLULAR BOWLING GREEN, KY TNS TELCO OF NATCHITOCHES NATCHITOCHES, LA TNT TELNET TNU USE IAC CODE UTC BOSTON, MA TNV TELPAGE OF NASHVILLE TNW WORLDCOM INC(PREV TEL-AMERICA NETWORK SERVICES INC) BEDFORD, TX TNX TENEX COMMUNICATIONS CORP WHITEPLAINS, NY TNY TRI-COUNTY TELEPHONE CO INC NEW RICHMOND, IN TNZ TECNET MONROE, LA TOA WORLDCOM INC. DBA TOUCH ONE LONG DISTANCE(PREV TOUCH 1 TULSA, OK AMERICA) TOB TELAMARKETING COMMUNICATIONS OF BURMINGHAM TOC TELEMARKETING COMMUNICATIONS OF COLUMBUS TOD TOTAL COM., INC. ENID, OK TOE STAR TELECOMMUNICATIONS INC DBA ALLSTAR TELECOM (PREV T- NEW YORK, NY ONE CORP) TOF TOLL CALL, INC. NORCROSS, GA TOG TELCO GROUP, INC. GRAND PRAIRIE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–198 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TOH TELAMARKETING COMMUNICATIONS OF OMAHA OMAHA, NB TOI TELECOM OPTIONS PLUS INC LARKSPUR, CO TOJ TELEMARKETING COMMUNICATIONS OF MISSISSIPPI (JACKSON) TOK TELEMARKETING OF OKLAHOMA CITY OKLAHOMA CITY, OK TOL TEL-CAR OF ORLANDO TOM WORLDCOM INC. (PREV. LDDS) TULSA, OK TON TOUCH AND SAVE OF NASHVILLE TOO TELECOMMUNICATIONS COOPERATIVE NETWORK NEW YORK, NY TOP TELAMARKETING COMMUNICATIONS OF GREATER PHILADELPHIA TOQ TELCOMCO CHEHELIS, WA TOR WORLDCOM INC. (PREV. LDDS) TULSA, OK TOS TELAMARKETING COMMUNICATIONS OF SAN LUIS OBISPO OBISPO, CA TOT TELCOM COMMUNICATIONS INC FRESNO, CA TOU TELECOURIER COMMUNICATIONS BLOONINGTON, IL TOV BUCKEYE TELESYSTEM, INC. TOLEDO, OH TOW INVALID DO NOT USE REYNOLDSBURG, OH TOX TELECON HERKEMER, NY TOY TELECO PLUS INC MIAMI, FL TOZ TO-TEL COMMUNICATIONS SYSTEMS INC GRANGEVILLE, ID TPA TELEPHONE ANSWERING SERVICE INC GRAND RAPIDS, MI TPB TELEPAGE OF BEAUFORT TPC TRANSPONDER CORP OF DENVER TPD ONESTAR LONG DISTANCE, INC. (PREV. TELSTAR COMMUNICATIONS, ARBOR VITAE, WI INC) TPE TELPAGE INC TPF TRANSPACIFIC TELECOMMUNICATION INC SEATTLE, WA TPG TELE-PAGE CORPORATION TPH TOMPHONE INC TPI TELAMARKETING COMMUNICATIONS OF PIEDMONT GREENSBORO, NC TPJ TELEPHONE AND TWO-WAY INC. CLEVELAND, OH TPK TELECOMP COMMUNICATIONS SERVICES OAKBROOK TERRACE, IL TPL TRI-STATE PAGING LIMITED TPM TELEPORT COMMUNICATIONS GROUP INC (WHOLLY OWNED SUB. OF DAYTON, NJ AT&T) TPN TRAVELPHONE CORP INC TPO TELEPERO INC FAIRFAX, VA TPP TAPP COMMUNICATIONS TPQ TELEPHONE CONNECTIONS MOUNTAIN HOME, AK TPR TELECOM COMMUNICATIONS OF PUERTO RICO INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–199 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TPS TEL-CAR OF PENSACOLA TPT TELEPOINT COMMUNICATIONS INC TPU VARTEC TELECOM, INC (SEE URC) RICHARDSON, TX TPV TELEPHONE ECONOMY LEAGUE JENKINTOWN, PA TPW TEMPEST ASSOCIATES INC. GREAT NECK, NY TPX TCI OF PA PHILADALPHIA, PA TPY TELEPORT COMMUNICATIONS OF CHICAGO CHICAGO, IL TPZ TELAMARKETING COMMUNICATIONS OF PEORIA PEORIA, IL TQA TRANSLINE COMMUNICATIONS INC PRAIRIE VILLAGE, KS TQB CTC COMMUNICATIONS INC DALLAS, WI TQC TCI TELECOMMUNICATIONS CONSULTANTS INC ARLINGTON, TX TQD TELEPORT COMMUNICATIONS GROUP SAN DIEGO SAN DIEGO, CA TQE TEAM ELECTRONICS ESCANABA, MI TQF TRUE AMERICA COMMUNICATIONS (PREV TELAMERICA CORP) SAN FRANCISCO, CA TQG TELECOM RESOURCES INC(WHOLLY OWNED SUB OF IONEX DALLAS, TX TELECOMM INC.) TQH TELEPORT COMMUNICATIONS GROUP OF OMAHA OMAHA, NE TQI EQUALNET CORPORATION (PREV TELECORP INTERNATIONAL) DALLAS, TX TQJ TELQUEST COMMUNICATIONS, CORP NAPLES, FL TQK TALK TIME COMMUNICATIONS, LTD. JAMAICA, NY TQL GST TELECOM (PREV TOTAL NET) HOUSTON, TX TQM TEMPLETON TELEPHONE COMPANY TEMPLETON, IA TQN TELECOMMUNICATIONS NETWORK INC KENDALL PARK, NJ TQO TELCO SYSTEMS MANAGEMENT INC - TELCO RENO, NV TQP TELECONCEPTS INC PRINCETON, NJ TQQ THE CONNECTION JUNEAU, AK TQR TRI-CITIES COMMUNICATIONS INC BINGHAMTON, NY TQS TOTAL COMMUNICATION SYSTEMS SENECA, SC TQT TELECOMMUNICATION TECHNOLOGIES INC SAN DIEGO, CA TQU TRITEL COMMUNICATIONS, INC. SAN DIEGO, CA TQV TOOR INC/DBA QSERVICES HOUSTON, TX TQW XO COMMUNICATIONS, INC(PREV NEXTLINK) SPOKANE, WA TQX TCN INC SAN ANTONIO, TX TQY TRICOM USA INC JERSEY CITY, NJ TQZ THORN COMMUNICATIONS, LLC NEW YORK, NY TRA TRANSAMERICAN COMMUNICATIONS CORP TRB TRANS-BORDER COMMUNICATIONS, INC LAIEDO, TX TRC TRACY CORP

Proprietary — Licensed Material See proprietary restrictions on title page. 9–200 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TRD HF COMMUNICATIONS CORP MIAMI, FL TRE TREETOP ENTERPRISES TRF EXTELCOM DBA EXPRESS TEL (PREV. T-TEL) SALT LAKE CITY, UT TRG TELAMARKETING COMMUNICATIONS OF RALEIGH RALEIGH, NC TRH TERRE HAUTE COMMUNICATIONS INC TERRE HAUTE, IN TRI WORLDCOM INC. (PREV. LDDS) TULSA, OK TRJ TRANSWORLD NETWORK INC. RICHARDSON, TX TRK TEXACO REFINING & MARKETING INC BELLAIRE, TX TRL TRANSTELL COMMUNICATION OAKLAND, CA TRM TRI-COM BELLINGHAM, WA TRN TRI-COMM SYSTEMS TAHLEQUAH, OK TRO TELEPHONE AND RADIO ANSWERING SERVICE TRP USE IAC CODE TZB FORT LEE, NJ TRQ TRISTAR COMMUNICATIONS INC SAN FRANCISCO, CA TRR TREASURE COMMUNICATION CO TRS TRANSAMERICAN SYSTEMS INC TRT TRT TELECOMMUNICATIONS CORP TRU TREASURE COMMUNICATIONS TRV TELAMARKETING COMMUNICATIONS OF ROANOKE VALLEY ROANOKE, VA TRW TELEPHONE ELECTRONICS NETWORK LTD YORK, PA TRX TREXNET TRY THRIFTY TELEPHONE EXCHANGE OF SANTA FE SANTA FE, NM TRZ TRT INTERNATIONAL CORP WASHINGTON, DC TSA TELSAT COMMUNICATIONS INC DOVER, DE TSB TMC OF SANTA BARBARA (NOW TMC COMMUNICATIONS - TVT) SANTA BARBARA, CA TSC TEL-PAGE OF SOUTH CAROLINA TSD TMC LONG DISTANCE DBA CHERRY COMMUNICATIONS INC WESTCHESTER, IL TSE TELEPHONE SECRETARIAL SERVICE TSF WORLDCOM INC. (PREV. LDDS) TULSA, OK TSG WORLDCOM INC(PREV TEL-LEASING) CHICAGO, IL TSH TEL-SHARE TSI TELECOMMUNICATIONS SYSTEMS INC TSJ TELECOMMUNICATION SYSTEMS ANNAPOLIS, MD TSK TELAMARKETING COMMUNICATIONS OF STOCKTON (NOW TMC VENTURA, CA COMM-TVT) TSL TELEPHONE SYSTEM TALLAHASSEE, FL TSM TEL SYSTEMS MANAGEMENT CORP TSN TELECONNECT SYSTEMS INC MONROE, LA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–201 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TSO TELEPHONE ANSWERING SERVICE OF OWBO TSP TELESPHERE INTERNATIONAL TSQ TEL-A-SAVE COMMUNICATIONS SYSTEMS LTD DURANT, OH TSR MID ATLANTIC TELECOM CORP OWINGSMILLS, MD TSS TELECOM SYSTEMS TST USE IAC CODE TZB FORT LEE, NJ TSU TELSO INC HOUSTON, TX TSV TELEPHONE ANSWERING SERVICE OF MORGANTON TSW TEL-SPAN COMMUNICATIONS INC NASHVILLE, TN TSX TELEPHONE SYSTEMS INC PITTSBURGH, PA TSY TEL RATE SYSTEMS INC TSZ TEL SYSTEMS CORPORATION TTA THOMAS TELEPHONE ANSWERING SERVICE TTB COMTEL STATES CORP TAMPA, FL TTC TRINITY TELECOMMUNICATIONS CORP TTD TELETEC COMMUNICATIONS COLUMBUS, MO TTE TELPAGE OF TENNESSEE TTF T&T COMMUNICATIONS FAIRMONT, WV TTG TELAMARKETING COMMUNICATIONS OF CHATTANOOGA CHATANOOGA, TN TTH TELE-TECH INC SOUIX FALLS, SD TTI T T I COMMUNICATIONS CO TTJ TOTAL TELECOMMUNICATIONS SERVICES, INC. OKLAHOMA CITY, OK TTK NATIONAL TELETALK TUCUMCARI, NM TTL TOTAL COMMUNICATIONS TTM WORLDCOM INC. (PREV. LDDS) TULSA, OK TTN TALTON COMMUNICATION CORP INC TTO TMC OF TOLEDO TOLEDO, OH TTP TOTAL TELE-PAGE OF NEBRASKA NORTH PLATTE, NE TTQ TEL TEC EXCHANGE INC AGORUA HILLS, CA TTR TELSTAR COMMUNICATIONS INC TTS TRANSAMERICAN TELEPHONE SYSTEMS TTT TELAMARKETING COMMUNICATIONS OF CINCINNATI CINCINNATI, OH TTU COVISTA, INC. (PREV TOTAL-TEL USA INC) LITTLE FALLS, NJ TTV SAM’S DISCOUNT LONG DISTANCE INC. (PREV. TNT KENNEDALE, TX COMMUNICATIONS) TTW FRONTIER COMMUNICATIONS-NORTH CENTRAL REGION, INC(PREV ROCHESTER, NY TCI TELEC) TTX TELETEX AUSTIN, TX TTY TEL TEC EXCHANGE OF PA WAYNE, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–202 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TTZ TELAMARKETING COMMUNICATIONS OF TULSA TULSA, OK TUA TULSA COMMUNICATIONS SERVICE TULSA, OK TUB TRANSTAR COMMUNICATIONS, L.C. BEDFORD, TX TUC DTG COMMUNICATIONS, INC (PREV TELECOMMUNICATIONS IRENE, SD CONSULTANTS INC) TUD TELLURIDE PAGING & COMMUNICATIONS PAONIA, CO TUE TRIANGLE COMMUNICATION SYSTEM, INC. HAVRE, MT TUF TELAMARKETING COMMUNICATIONS OF S CALIFORNIA PASADENA, CA TUG TELUS COMMUNICATIONS INC CALGARY, AB TUH WORLDCOM INC. (PREV. TOUCH-1) TULSA, OK TUI TRI-STAR COMMUNICATIONS BAKER, MT TUJ TOUCH-TEL COMMUNICATIONS, INC HOUSTON, TX TUK TUCK DATA COMMUNICATION NEW CUMBERLAND, PA TUL TULSA CELLULAR TELEPHONE COMPANY TULSA, OK TUM TOUCH 1 COMUNICATIONS, INC. ATMORE, AL TUN TRI-COUNTY COMMUNICATIONS TALLAHASSEE, FL TUO TSC COMMUNICATIONS, INC WAPAKONETA, OH TUP TELECOMMUNICATIONS MANAGEMENT GROUP, L.L.C. HATTIESBURG, MI TUQ TELUS COMMUNICATIONS INC SACRAMENTO, CA TUR TELEPRENEUR ENTERPRISES OAKLAND, CA TUS TUSCARAWAS LONG DISTANCE SERVICE NEW PHILA, OH TUT TELTRUST, INC. SALT LAKE CITY, UT TUU TOUCH TONE AMERICA, INC. PHOENIX, AZ TUV TELECOMMUNICATIONS SERVICE CENTER INC TAMPA, FL TUW TELEMEDIA INTERNATIONAL U.S.A., INC. JERSEY CITY, NJ TUX TELCOM PLUS LTD HOMESTEAD, FL TUY TREASURE STATE MOBILE PHONE INC BUTTE, MT TUZ TRM COMMUNICATIONS INC LONGVIEW, TX TVA TRAVERSE ANSWERING SERVICE TRAVERSE CTY, MI TVB TV BINGO NETWORK, INC. TULSA, OK TVC TELEVALUE CORP. DBA ECON-O-DIAL RIDGECREST(PREV. TELEVALUE RIDGECREST, CA COMM) TVD TRICOM USA, INC (PREV (DOMTEL COMM, INC DBA TRICOM NEW YORK CITY, NY INTERNATIONAL) TVE TELSAVE INC BROOKFIELD, WI TVF CTC TELECOM, INC CAMBRIDGE, ID TVG TELAMARKETING COMMUNICATIONS OF LAS VEGAS LAS VEGAS, NV TVH THREE RIVERS TELEPHONE, INC. FAIRFIELD, MT TVI TELECARRIER SERVICES INC. CRANFORD, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 9–203 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TVJ TELEMANAGEMENT SERVICES INC WESTLAKE VIILLAGE, CA TVK TOUCHTONE COMMUNICATIONS LONDON, KY TVL TRAVELTEL INC SALT LAKE CITY, UT TVM TELSERVE COMMUNICATION, INC. RICHARDSON, TX TVN THE PHONE COMPANY (PREV TEL-SAVE INC) NEW HOPE, PA TVO TRAVELERS TELECOM CORPORATION SEWELL, NJ TVP TELEMATIC/VIP COMMUNICATIONS SOUTH HAPTON, PA TVQ TELEMANAGEMENT ADVANTAGE CORP LOS ANGELES, CA TVR TEXAS ASSOCIATION OF PAGING SERVICES WACO, TX TVS TRAVIS TELECOM AUSTIN, TX TVT TMC COMMUNICATIONS (PREV TMC OF VENTURA) VENTURA, CA TVU TOUCH TONE INTERACTIVE, INC. PHOENIX, AZ TVV TEL-SAVE TVW TELEVIEW COMMUNICATIONS, INC LESLIE, GA TVX TELA-SAVER SAN ANTONIO, TX TVY CITY OF THOMASVILLE THOMASVILLE, GA TVZ TIDALWAVE TELEPHONE INC CHANTILLY, VA TWA TRANS WORLD AIRLINES INC NEW YORK, NY TWB TELEPOOL NETWORK, INC. MINNEAPOLIS, MN TWC TOWER COMMMUNICATIONS INC TWD TIMEWARNER COMMUNICATIONS ENGLEWOOD, CO TWE TOWER COMMUNICATIONS LOS ANGELES, CA TWF TIME WARNER TELECOM OF CALIFORNIA L.P. (PREV TIME WARNER SAN DIEGO, CA AXS CA) TWG TW COMMUNICATIONS, INC. D/B/A TWC COSTA MESA, CA TWH METRO TELECOMMUNICATIONS SERVICES INC(PREV TMC OF WA DC) WASHINGTON, DC TWI TELEPHONE WAREHOUSE INC TWJ TRANS-WORLD TELECOM AMERICA, INC. LAGUNA HILLS, CA TWK USE IAC CODE TIM ENGLEWOOD, CO TWL TALTON TELECOMMUNICATIONS CORP SELMA, AL TWM THE WARDROBE MAKER BOSTON, MA TWN TRANSCOMM NET INC PLYMOUTH, MN TWO TWO-WAY RADIO INC WYTHEVILLE, VA TWP TELROUTE COMMUNICATION INC NORTH YORK, ON TWQ TELE-WAVES PASCO, WA TWR TWO-WAY RADIO COMMUNICATIONS TWS TELEPHONE ELECTRONICS CORP WEST MONROE, LA TWT TELENET COMMISSION INDIANAPOLIS, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 9–204 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TWU TETON COMMUNICATIONS INC IDAHO FALLS, ID TWV TRANSWAVE COMMUNICATIONS CO ATLANTA, GA TWW TEW-WAY COMMUNICATIONS INC METAIRIE, LA TWX TWIX-TEL SOMERVILLE, MD TWY TWO-WAY RADIO OF CAROLINAS INC TWZ TRANSACTION NETWORKS INC BOYNTON BEACH, FL TXA TEXAPAGE PARIS, TX TXB TEXAS COMMUNICATIONS OF BRYAN BRYAN, TX TXC TEXCOM INC TXD TEXACOM CORPORATION HOUSTON, TX TXE TEXAS COMMUNICATIONS, INC. ABILENE, TX TXF TEXAS 5 CORP LEXINGTON, KY TXG TELEMAX INTERNATIONAL CORP. BROOKLYN, NY TXH TELMEX LARGA DISTANCIA COLONIA CUAUHTEMOC, MX TXI TELNEX INC TAMPA, FL TXJ TEXAS INSTRUMENTS, INC. DALLAS, TX TXK TELPLEX INC. TUCSON, AZ TXL STAR TELE. INC DBA ALLSTAR TELECOM (PREV DIGITAL NETWORK DALLAS, TX INC) TXM TEXOMA BUSINESS MACHINES INC SHERMAN, TX TXN TEX-NET INC SAN ANTIONIO, TX TXO WORLDCOM INC. (PREV. LDDS) TULSA, OK TXP TELEPHONE EXPRESS INC DALTON, GA TXQ TEL CALL IMC MT VERNON, OH TXR TEXAS RSA 15B2 LIMITED PARTNERSHIP KERRVILLE, TX TXS TEXAS COMMUNICATIONS SAN ANGELO, TX TXT TEXUSTELL INC HOUSTON, TX TXU TEXAS 12 CELLULAR CORPORATION FAIRFIELD, CA TXV US BUYING GROUP, INC. (PREV. TELEVOX PUBLIC COMMUNICATIONS ALSIP, IL INC) TXW TELWEST INC JACKSON, MS TXX ACCESS PLUS (FMLY TELE RATE) ALBERT LEA, MN TXY TECORE INC LINTHICUM, MD TXZ TEL AMERICA TULSA, OK TYA TIN CAN COMMUNICATIONS COMPANY, L.L.C. HOUSTON, TX TYB TRITEL COMMUNICATIONS INC RIDGELAND, MS TYC THRIFTY CALL LINCOLN, NE TYD TRI-COUNTY LONG DISTANCE EVERTON, AR

Proprietary — Licensed Material See proprietary restrictions on title page. 9–205 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TYE TELCOM MANAGEMENT SYSTEMS LIMITED PARTNERSHIP CHICAGO, IL TYF TEXAS TWO-WAY FONE JACKSBORO, TX TYG TECHNOLOGY SERVICE GROUP INC TAMPA, FL TYH TECH COM, INC. BLUE RIVER, WI TYI TRINITY INTERNATIONAL, INC. CORONA, NY TYJ TXU COMMUNICATIONS TELECOM SERVICES CO DBA TXU LUFKIN, TX COMMUNICATIONS TYK TOTAL MEDIA TECHNOLOGIES, INC. SAN DIEGO, CA TYL LCC (PREV TYLER TELECOM) LUFKIN, TX TYM TYMNET INC TYN TYLER NET TYLER, TX TYO RCN TELECOM SERVICES OF ILLINOIS INC(PREV 21ST CENTURY TELE CHICAGO, IL IL ) TYP TIMELY INFORMATION CORP CRANFORD, NJ TYQ TELERGY, INC. SYRACUSE, NY TYR WORLDCOM INC(PREV SECURITEX DBA TYLERNET LONG DISTANCE) BEDFORD, TX TYS TELE-SYS INC OAKRIDGE, TN TYT TWO-WAY SYSTEMS SERVICE FAIRMONT, WV TYU TRI-COUNTY COMMUNICATIONS, INC. STRUM, WI TYV TELERGY JOINT VENTURE DEWITT, NY TYW TDS TELECOM MADISON, WI TYX 2ND CENTURY COMMUNICATIONS, INC TAMPA, FL TYY TELECOIN COMMUNICATIONS RICHARDSON, TX TYZ TELEPHONE ANNOUNCEMENT SYSTEMS INC MARLTON, NJ TZA TELAMERICA MIAMI, FL TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS LLC) FORT LEE, NJ TZC TELESCAN INC KINGSPORT, TN TZD TLD INC SAN JUAN, PR TZE T C ENTERPRISES RICHMOND, CA TZF TELECOM NEW ZEALAND USA LTD PASADENA, CA TZG TEXAS STATE TELEPHONE HUNTSVILLE, TX TZH TECHNI SALES & SERVICE ELMWOOD, NC TZI TRI-STATE PAGING INC FAYETTESVILLE, AR TZJ TEL WEST COMMUNICATIONS L.L.C. MONROVIA, CA TZK TONCOM, INC TONICA, IL TZL TELECOMMUNICATIONS LINK INC PLYMOUTH, MN TZM TELECOM SUPPORT SYSTEMS INC SIMI VALLEY, CA TZN TELEPAGE NORTHWEST PORTLAND, OR TZO TENCOM VAN NUYS, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–206 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location TZP TELEPORT COMMUNICATIONS DALLAS DALLAS, TX TZQ TELECONCEPTS INC COLORADO SPRINGS, CO TZR TRI-STATE PAGING INC CANOM, CA TZS TELESTAR 900 RANCHO CARDOVA, CA TZT TRANSNET TAMPA, FL TZU TELEPHONE SUPPORT SYSTEMS INC FT MEYERS, FL TZV TRITON PCS, INCORPORATED RICHMOND, VA TZW TWO-WAY RADIO COMMUNICATIONS CO OF KANSAS INC LIBERAL, KS TZX MID TNC DBA MIDCOM COMMUNICATIONS INC. SEATTLE, WA TZY TEASE COMMUNICATIONS PLANO, TX TZZ T-COM INC JACKSON, MI UAA USBG, INC. ALSIP, IL UAB US AVE-TEL, INC. ARLINGTON HEIGHTS, IL UAC U S ACCESS COLORADO SPGS, CO UAG UNITED STATES DEPT. OF AGRICULTURE FORT COLLINS, CO UAI USA TELEPHONE INC MIAMI, FL UAK CELLULAR LINK, INC. SAN JOSE, CA UAL U.S. AMERITEL SCHAUMBURG, IL UAM US AMERICALL INC SHERMAN OAKS, CA UAN US ADVANCED NETWORK NORCROSS, GA UAP URBAN COMMUNICATIONS TRANSPORT CORPORATION NEW YORK, NY UAR USAIR COMMUNICATIONS WINSTON-SALEM, 91 UAS U S AUTOMOBILE ASSOCIATION SATELLITE COMMUNICATIONS UAT UNITED ARTISTS OPERATOR SERVICES CORP DENVER, CO UAV US ADVANTAGE LONG DISTANCE INC AUSTIN, TX UBC COMMUNITY CABLE TV AGENCY - O’BRIEN CNTY DBA CMNTY AGENCY SANBORN, IA & TCA UBD UNITED BANK OF DENVER DENVER, CO UBE CUBE COMPUTER CORPORATION HAWTHORNE, NY UBL UINTAH BASIN LONG DISTANCE ROOSEVELT, UT UBN UMB BANK, N.A. KANSAS CITY, MO UBQ UBIQUITEL OPERATING COMPANY SPOKANE, WA UBR UNIVERSAL BROADBAND COMMUNICATIONS, INC. IRVINE, CA UBT UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS ROOSEVELT, UT UBY CUMBY TELEPHONE COOPERATIVE, INC. CUMBY, TX UCA ULTRA COMMUNICATIONS ASSOCIATION ALEXANDRIA, VA UCB UNION CARBIDE CORP DANBURY, CT UCC USC COMMUNICATIONS INC DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–207 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location UCE UNITED CELLULAR & PAGING, INC. BRONX, NY UCG USA CALLING ATLANTA, GA UCH UNITED COMMUNICATIONS HUB, INC. WEST HILLS, CA UCI UNITED COMMUNICATIONS ASSOCIATION, INC. DODGE CITY, KS UCK U.S. CONNECT, LLC. LOUISVILLE, KY UCL USE IAC CODE SVU DES MOINES, IA UCM UNITED COMMUNICATIONS INC NEW CONCORD, OH UCN AT&T CANADA LONG DISTANCE SERVICES (PREV. UNITEL COMM. - TORANTO, ON, CN TORONTO) UCO USHMAN COMMUNICATIONS COMPANY SPRINGFIELD, IL UCP UNION COUNTY PROSECUTORS OFFICE ELIZABETH, NJ UCQ U S COMMUNICATIONS COMPTON, CA UCR UNISOURCE CARRIER SERVICES WALLISELLEN, SZ UCS UNITED CARRIER SERVICES INC ST CHARLES, MO UCT U S CENTRAL TELECOMMUNICATIONS CORP HOUSTON, TX UCU UNITED STATES CELLULAR CHICAGO, IL UCV UNLIMITED COMMUNICATION SERVICE LLC TRENTON, NJ UCY UNITED COMMUNICATIONS SYSTEMS, INC. CHICAGO, IL UDA US DATANET CORPORATION SYRACUSE, NY UDE UNITED WATS, INC. MISSION, KS UDH U.S. DATA HIGHWAY CORPORATION PLEASANTON, CA UDL USA DIGITAL, INC. DBA USA DIGITAL OF NEVADA, INC. FT. LAUDERDALE, FL UDM UNITED TELECOMMUNICATIONS INC LIVONIA, MI UDO UNITED STATES TELECOMMUNICATIONS, INC. TAMPA, FL UDS UNITED L D S OLNEY, IL UDT UNITED TELENET UDY AUTOMATED DATA SYSTEMS INC MICHIGAN CITY, IN UEA SUN-TEL USA, INC JACKSONVILLE, FL UEC U.S. TEL CORPORATION FISHERS, IN UED UNITED TELECOM, LLC GREAT NECK, NY UEE UNIVERSAL TELECOM, INC. LAGRANGE, KY UEI U.S. TELCO, INC. IRVING, TX UEL WORLDCOM INC. (PREV. LDDS) TULSA, OK UEM UNITED TELECOM, INC. ALANSON, MI UEO UTEX COMMUNICATIONS CORP. AUSTIN, TX UEP UNI-TEL OF AMERICA INC EL PASO, TX UER CUSTER TELEPHONE COOPERATIVE, INC. CHALLIS, ID UEX AUTOMOTIVE EXPERTS GROUP, INC. DBA BEND DATA CENTER BEND, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 9–208 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location UFB US FIBERCOM NETWORK INC NEW YORK, NY UFC UNITED REFINING COMPANY WARREN, PA UFI UNIFIED TELECOMMUNICATIONS SERVICES OF ST LOUIS INC ST CHARLES, MO UFL US FIBERLINE COMMUNICATIONS INC SAN DIEGO, CA UFO CUSTOMER FIRST COMMUNICATIONS, INC. ROLLING MEADOWS, IL UGC UNITEL GLOBAL COMMUNICATIONS INC OKLAHOMA CITY, OK UGK AUGLINK COMMUNICATIONS, INC. ST. AUGUSTINE, FL UGL USA LINK, P.L. D/B/A USA GLOBAL LINK FAIRFIELD, IA UGR UNITED GROUP LTD MIAMI, FL UHC US LEC OF NORTH CAROLINA L.L.C. CHARLOTTE, NC UHD U.S. TELEFONE HOLDING COMPANY INC DBA U.S. TELEFONE, INC. ALTA LOMA, CA UHT ULTIMATE HOME TELEPHONE SERVICE EAST ORANGE, NJ UIA USE IAC CODE INA DENVER, CO UIC UNICOM, INC. ANCHORAGE, AK UID LIGHTYEAR COMMUNICATIONS, INC. (PREV UNIDIAL LOUISVILLE, KY COMMUNICATIONS, INC) UIL UI LONG DISTANCE, INC. STANDISH, ME UIM TUCCI COMMUNICATIONS, LLC. CALABASAS, CA UIO UNICOM COMMUNICATIONS, L.L.C. FT. LAUDERDALE, FL UIP UNION TELEPHONE COMPANY FARMINGTON, NH UIS UNISYS CORP BLUE BELL, PA UIT UNITED INTERMOUNTAIN TELEPHONE CO UIV UNIVERSAL INFORMATION SERVICES, INC. TUSTIN, CA UJB URJET BACKBONE NETWORK LOS ANGELES, CA UKI UKI COMMUNICATIONS, INC. LAS VEGAS, NV UKS U-TALK SERVICES CHICAGO, IL UKU UNITED-KUC, INC. ANCHORAGE, AK UKV UNIVERSITY OF TENNESSEE AT KNOXVILLE KNOXVILLE, TN ULA THE ULTIMATE CONNECTION L.C. DBA DAYSTAR COMMUNICATIONS PORT CHARLOTTE, FL ULC UTELCO INC MONROE, WI ULD U.S. BILLING (PREV. U.S. LONG DISTANCE) SAN ANTONIO, TX ULG UNITED TELEPHONE LONG DISTANCE (OHIO) MANSFIELD, OH ULI U.S. LONG DISTANCE, INC SAN ANTONIO, TX ULK U-TALK CORPORATION SUGAR LAND, TX ULL UTEL-CALL MONROE, WI ULM ATHENA INTERNATIONAL LLC(PREV. ULTIMATE COMMUNICATIONS BOULDER, CO CORP) ULN UPSTATE CELLULAR NETWORK ROCHESTER, NY ULO TULAROSA COMMUNICATIONS, INC. TULAROSA, NM

Proprietary — Licensed Material See proprietary restrictions on title page. 9–209 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ULP UTILICORE CORPORATION SARASOTA, FL ULR ULTRA CELLULAR, INC. LAWNDALE, CA ULS UNITED TELEMANAGEMENT SERVICES, INC. NEW YORK, NY ULT ULTRATELCOM INC CULVER CITY, CA ULY UNITED TELE - SYSTEMS COLONIAL HEIGHTS, VA UMB USA MOBILE COMMUNICATIONS INC II (INDIANAPOLIS) INDIANAPOLIS, IN UMC CUMMINGS TELECOMMUNICATION SERVICES, INC. WESTCHESTER, IL UMD UNIVERSAL STANDARD MEDICAL LABORATORIES INC SOUTHFIELD, MI UME CUMBERLAND TELEPHONE COMPANY CUMBERLAND, IA UMF USC MEDFORD PAGING MEDFORD, OR UMG URBAN MEDIA LONG DISTANCE, INC. PALO ALTO, CA UML USA MOBILE COMMUNICATIONS INC II (LOUISVILLE) LOUISVILLE, KY UMN UNITED MOBILE NETWORK LONGVIEW, TX UMO UM COMMUNICATIONS, INC. PALO ALTO, CA UMS US MOBILE SERVICES, INC. ANNAPOLIS, MD UMT UNITED STATES CELLULAR MOBILE TELEPHONE NETWORK VANCOUVER, WA UMU UNICALL COMMUNICATIONS INCORPORATED NEW YORK, NY UMV U.S. METRO LINE SERVICES, INC. GARLAND, TX UMW TSUNAMI NETWORKS, INC. NEW YORK, NY UNA UNITED NATIVE AMERICAN TELECOMMUNICATIONS BELLINGHAM, WA UNC UNIVERSITY COMMUNICATIONS INC (PREV UNICOM INC) COLLEGE STATION, TX UND ZUNDEL’S RADIO INC POCATELLO, ID UNE UNITEL (UNIVERSAL TEL NETWORK INC) AUSTIN, TX UNF INTERMEDIA COMMUNICATIONS (PREV UNIVERSAL TELECOM INC) ST. LOUIS, MO UNI UNITEL OF CLAREMORE UNK UNITED STATES ADVANCED NETWORK INC NORCROSS, GA UNL BROADWING TELECOMMUNICATIONS INC (PREV CINCINNATI BELL COLUMBUS, OH LONG DIST) UNM UNION COMMUNICATIONS MONROE, NC UNN UNINET DETROIT, MI UNO UNITEL COMMUNICATIONS (OKLAHOMA) OKLAHOMA CITY, OK UNR UNI STAR SATELLITE COMMUNICATION UNS UNITED NETWORK SERVICE INC OF DALLAS UNT UNI-TEL OF FARMINGTON INC FARMINGTON, NM UNU UNIVERSAL TELECOMMUNICATIONS INC CORVALLIS, OR UNV USWEST NEW VECTOR GROUP INC DBA AIR TOUCH CELLULAR BELLEVUE, WA UNW UNION-WALLOWA TELEPHONE, LLC LA GRANDE, OR UNY UNITY CELLULAR SYSTEMS INC UNITY, ME

Proprietary — Licensed Material See proprietary restrictions on title page. 9–210 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location UNZ UNI COMMUNICATIONS INC OAKLAND, CA UOC U.S. SOUTH COMMUNICATIONS, INC. ATLANTA, GA UOD UNIVERSITY OF DAYTON INC (THE) DAYTON, OH UOE U.S. OPERATORS (TEXAS) SAN ANTONIO, TX UOI USCOM TELEPHONE, INC. CORPUS CHRISTI, TX UOM US ONE COMMUNICATIONS CORP. FRISCO, TX UOP UNIVERSITY OF PITTSBURGH PITTSBURGH, PA UOR US ORDER HERNDON, VA UOS UNION SPRINGS TELEPHONE CO MONTGOMERY, AL UOT USA SOFT-TRONIK CORPORATION SAN FRANCISCO, CA UOU U2 COMMUNICATIONS, INC. JACKSONVILLE, FL UPA U-PAGE, INC BINGHAMTON, NY UPC UNITED STATES TELEPHONE CO UPG USA PAGING KEARNEY, NE UPH USA PHONE 1, INC WATERTOWN, NY UPK U SPEAK LONG DISTANCE HURST, TX UPN UNICOM PAGING NETWORK INC HOUSTON, TX UPP UNITED PAC PAC REL INS UPS UPSTATE PAGING, INC. PLATTSBURGH, NY UPT UNION PACIFIC TECHNOLOGIES OMANA, NE UPU UNITED PUBLISHERS CORPORATION EL SEGUNDO, CA UPX UNIPLEX TELECOM TECHNOLOGIES INC FT LAUDERDALE, FL UPY US PAYPHONE INC SALT LAKE CITY, UT UQP USA QUICK PHONE, INC. BRIDGEPORT, TX URA AURA COMMUNICATIONS, INC. DURHAM, NC URB U.S. ROBOTICS SKOKIE, IL URC VARTEC TELECOM INC(PREV. U.S. REPUBLIC COMMUNICATIONS, INC) DALLAS, TX URD URBAN MEDIA PALO ALTO, CA URE SURETEL, INC. OKLAHOMA CITY, OK URG UPPER RIO GRANDE NEIGHBORHOOD TELECOM, INC ALAMOSA, CA URM URBAN MEDIA COMMUNICATIONS CORPORATION PALO ALTO, CA URR SURRY TELECOMMUNICATIONS, INC. DOBSON, NC URS URSUS TELECOM CORPORATION SUNRISE, FL URT UNITED RADIOTELEPHONE URV 800SURVEY.COM, INC. NEW YORK, NY USA UNITED SERVICES ADMINISTRATION USB U S BANCORP PORTLAND, OR USC UNIVERSAL COMMUNICATIONS SYSTEMS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–211 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location USD AMERICAN TELEDATA DBA US DIAL JACKSONVILLE, FL USE US ELECTRODYNAMICS INC BREWSTER, WA USF U S FIBEROPTICS INC BARRINGTOM, IL USG USA LONG DISTANCE CORPUS CHRISTI, TX USH XO TENNESSEE, INC (PREV NEXTLINK TENNESSEE) FRANKLIN, TN USI CIERA NETWORK SYSTEMS, INC (PREV EQUALNET CORPORATION) HOUSTON, TX USJ US CONNECT CORP MIDDLETOWN, NJ USK U S OF KENTUCKY USL USLINK LONG DISTANCE PEQUOT LAKES, MN USM USA MOBILE COMMUNICATIONS INC CINCINNATI, OH USN US TELEMANAGEMENT NETWORK INC PHOENIX, AZ USO US OPERATOR INC CALVERTON, MD USP USE IAC CODE UTC SHAWNEE MISSION, KS USQ US TELECOMM INC GREAT NECK, NY USR USAIR WASHINGTON, DC USS USA-SATCO CO SAN ANTONIO, TX UST USE IAC CODE ITT USU U.S. TELESERVICES, INC. FAIRFAX, VA USV U S VOICE MAIL DETRIOT, MI USW U S WEST SERVICE LINK INC OMAHA, NE USX USTEL/ARCADA (PREV USTEL) SEATTLE, WA USY TELCO HOLDINGS, INC(PREV NATIONAL PAYPHONE SUPPLY DBA RATE CHANTILLY, VA SAVER) USZ U S NET INC SPRINGFIELD, MO UTA OAN SERVICES, INC. (PREV US TELEDATA CORP) NORTHRIDGE, CA UTB UNITED TELECOMMUNICATIONS & TECHNOLOGIES, INC. COLUMBUS, OH UTC SPRINT COMMUNICATIONS INC (PREV SPRINT/US TELECOM INC) KANSAS CITY, MO UTD TLX COMMUNICATIONS, INC. DBA TELAMERICA L.D. (PREV UNITED BATON ROUGE, LA TELE CO UTE UTE COMMUNICATIONS UTF UNITED TELEPHONE OF FLORIDA ALTAMONTE SPRINGS, FL UTG UNITED TECHNOLOGICAL SYSTEMS DBA UNI-TEL INC. DALLAS, TX UTH UNIVERSITY OF UTAH SALT LAKE CITY, UT UTI UNITED TELESPECTRUM OF INDIANA UTK USN COMMUNICATIONS(PREV. UNITED TELECOM OF AMERICA, INC.) CHICAGO, IL UTL UNITED TELECOM COMMUNICATIONS INC UTM UNITED TEL COMMUNICATIONS, INC. MIAMI, FL UTN UNITED TELNET SYSTEMS ARCADIA, CA UTO UNITED TELEMANAGEMENT CORPORATION DAYTON, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 9–212 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location UTP UNITED STATES TRANSMISSION CORP UTR UTICA/ROME CELLULAR TELEPHONE UTICA, NY UTS UNITED TELESPECTRUM INC KANSAS CITY, MO UTT UNION TELEPHONE CO MOUNTAIN VIEW, WY UTU USTELENET PLAINVIEW, NY UTV UNIVERSITY TELEPHONE SERVICES COLLEGE STATION, TX UTW UTILICOM NETWORKS FRANKLIN, MA UTX UTC LONG DISTANCE, LLC CHAPEL HILL, TN UTY UNIVERSAL TELEPHONE SYSTEMS SEATTLE, WA UTZ UNITED TELEPHONE OF AMERICA BALA CYNWYD, PA UUN UUNET TECHNOLOGIES, INC. FAIRFAX, VA UVA UNIVERSAL ACCESS, INC. CHICAGO, IL UVC UV CORP HUTCHINSON, KS UVE UNIVERSITY OF CALIFORNIA SANTA BARBARA SANTA BARBARA, CA UVL UNIVERSAL NETWORK COMMUNICATIONS CO UVM UNIVERSAL COMMUNICATIONS NETWORK, INC. CARSON, CA UVN UNIVERSALCOM INC DESTIN, FL UVR INTERMEDIA COMMUNICATIONS (PREV UNIVERSAL TELECOM HIGH RIDGE, MO TECHNOLOGIES) UVS UNIVERSAL LONG DISTANCE INC (SEE ACCESS UNLIMITED-AEU) LAWTON, OK UVT U.S. VOICE TELEMANAGEMENT MILL VALLEY, CA UVV UNIVERSAL SERVICES ELIZABETHTON, TN UVY UNIVERSITY HOSPITAL AUGUSTA, GA UWB U S WEST BROADBAND SERVICES, INC. DENVER, CO UWC U S WEST COMMUNICATIONS INC DENVER, CO UWH USA MOBILE COMMUNICATIONS INC II WARRENSVILLE HEIGHTS, OH UWI U S WEST COMMUNICATIONS INTERCONNECT SERVICES MINNEAPOLIS, MN UWM U S WEST MEDIA GROUP, INC. ENGLEWOOD, CO UWN UNITEL WIRELESS COMMUNICATIONS SYSTEMS EGG HARBOR TWP, NJ UWP ARCH WIRELESS HOLDINGS, INC. (PREV ARCH PAGING, INC) BELLEVUE, WA UWS QWEST COMMUNICATIONS INTERNATIONAL INC. (PREV U S WEST, ENGLEWOOD, CO INC) UWT CAPSULE COMMUNICATIONS, INC. (PREV US WATS) BENSALEM, PA UWW U S WEST COMMUNICATIONS, WIRELESS DENVER, CO UXC OMNIPLEX COMMUNICATIONS GROUP, LLC (PREV. USA EXCHANGE, CHESTERFIELD, MO LLC) UXW US XCHANGE OF WISCONSIN L.L.C. GRAND RAPIDS, MI UYA UNITED SYSTEMS ACCESS TELECOM, INC. KENNEBUNK, ME

Proprietary — Licensed Material See proprietary restrictions on title page. 9–213 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location UYO UTILITY SOLUTIONS ROCHESTER, NY UYS UNISYS MISSION VIEJO, CA UYT UTILITY TELEPHONE, INC. STOCKTON, CA UZC USCOMNET PROVIDENCE, RI UZF U S FIBERCOM DESOTA, TX UZT UNITED TELESERVICES INDUSTRIAL AIRPORT, KS VAA VALUE LINE OF ALBUQUERQUE (NEW NAME SVC) VAC VALUE ADDED COMMUNICATIONS OAKBROOK TERACE, IL VAD USE IAC CODE BNK IRVING, TX VAE VIANET SUDBURY, ON VAF AMERICAN FIBER NETWORK OF VIRGINIA, INC. OVERLAND PARK, KS VAL VALUE LINE OF EAST TEXAS (NEW CODE CAL) VAM VERMONT AMERICAN LOUISVILLE, KY VAN VANION TELECOM, INC. COLORADO SPRINGS, CO VAR VALSTAR, INC GERMANTOWN, NY VAS VALLEY ANSWERING SERVICE VAT VIATEL, INC. OMAHA, NE VAU VALOR TELECOMMUNICATIONS, LD, LLC. IRVING, TX VAW VAULTAIRE WIRELESS KNOXVILLE, TN VAY V C F, INC - VALLEY COMMUNICATIONS SALEM, VA VBC V.I.P. BILLING AND COLLECTION SERVICES, INC. TIMONIUM, MD VBI VBI, INC. MILWAUKEE, WI VBT VBI 2000 LLC RIDGELAND, MS VCC VOICE TELECOMM.,INC DBA VOICE-TEL OF EASTERN NEW YORK HARTSDALE, NY STATE VCE TELAMERICA COMMUNICATIONS, INC. (WAS VOICE INTERACTIVE MIAMI, FL PRODUCTION VCG COMPETETIVE COMMUNICATIONS GROUP CLEAR SPRING, MD VCH VALU COMMUNICATIONS OF HUTCHINSON INC HUTCHINSON, KS VCI VINCENT COMMUNICATIONS INC FRESNO, CA VCL VALU COMMUNICATIONS OF LAWRENCE INC LAWRENCE, KS VCM VALCOM INC VCN VOLCANO TELEPHONE CO PINE GROVE, CA VCO VALENCE COMMUNICATIONS SERVICES LTD DALLAS, TX VCR USE IAC CODE HWC SCHAUMBURG, IL VCS DEDICATED COMMUNICATIONS CORP (PREV 4JV ENTERPRISES, INC) TEMPE, AZ VCT VICKI COWAN DBA TEL-A-VOICE VCU VALUTEL COMMUNICATIONS, INC. AUSTIN, TX VCV VERNON COMMUNICATION & T.V., INC. SIOUX CENTER, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–214 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location VDC NATIONWIDE LONG DISTANCE (PREV. VADACOM) HOUSTON, TX VDG VERIZON ADVANCED DATA - VIRGINIA INC. NEW YORK, NY VDT WORLDXCHANGE CORP (PREV WORLDXCHANGE COMMUNICATIONS) SAN DIEGO, CA VEA AVERA COMMUNICATION, L.L.C. SIOUX FALLS, SD VEC VECTOR COMMUNICATIONS VED VAL-ED JOINT VENTURE L.L.P. PERHAM, MN VEI VOICE INTERACTIVE PRODUCTIONS INC MIAMI, FL VEL VELCERO, LLC MORRESTOWN, NJ VEN VERIZON AVENUE CORP (PREV VENTURES IN COMM. RMTS LLC DBA HERNDON, VA ONEPOINT VEO VERNON COMMUNICATIONS, LLC. WESTBY, WI VER VERIO INC ENGLEWOOD, CO VES NYNEX LONG DISTANCE COMPANY DBA VERIZON ENTERPRISES NEW YORK, NY SOLUTIONS VET VACNET PLANO, TX VEY VALLEY TELECOMMUNICATIONS CO SIERRA VISTA, AZ VFB AVISTA COMMUNICATIONS, INC (PREV AVISTA FIBER, INC) SPOKANE, WA VGD VANGUARD CELLULAR SYSTEMS INC GREENSBORO, NC VGE VIGAR ENTERPRISES INC DBA COMMUNICATION SERVICES LAREDO, TX VGI VISTA GROUP INTERNATIONAL CHARDON, OH VGM VIRGINIA METROTEL GLEN ALLEN, VA VGN VERTEX GROUP INC. LOS ANGELES, CA VGR VALUE LINE OF GREENVILLE VGS VERIZON GLOBAL SOLUTION INC. LIBERTY CORNER, NJ VGT VILLAGE TELEPHONE, INC NEWCASTLE, WA VHC VIRTUAL HIPSTER CORPORATION FALLON, NV VIA VITAL COMMUNICATION MARSHFIELD, WI VIC VICOM INC EDEN PRAIRIE, MN VID VIDEOTRON TELECOM LTEE MONTREAL, CA VIE VOICE CONNECTIONS, INC. NAPLES, FL VIL VAIL SYSTEMS INC BUFFALO GROVE, IL VIN WORLDCOM INC. (PREV VISTA INTERNATIONAL COMMUNICATIONS FLANDERS, NJ INC) VIP VALLEY INSTANT PAGE SACRAMENTO, CA VIR VITERIS, INC. DUNCANVILLE, TX VIS VITTS CORPORATION MANCHESTER, NH VIT VIRGIN ISLANDS TELE-COM ST THOMAS, VI VKI VIKING COMMUNICATIONS, INC. MORRISVILLE, PA VLA VALUE LINE OF ALEXANDRIA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–215 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location VLB VALUE LINE OF BRAZOSPORT VLC VAIL COMMUNICATIONS INC(DBA EGM 1994) AVON, CO VLD VERA LONG DISTANCE LAREDO, TX VLE VALLEY COMMUNICATIONS MOSES LAKE, WA VLF VOLT INFORMATION SCIENCES, INC. ORANGE, CA VLI VOICELINK, INC. NORCROSS, GA VLK BIRCH TELECOM, INC. (PREV VALU LINE OF KANSAS) EMPORIA, KS VLL VALU-LINE OF LOUISIANA LONGVIEW, TX VLM VOCALL COMMUNICATIONS CORP. MOUNTAINSIDE, NJ VLN VALUE LINE OF NEW BRAUNFELS (NEW NAME CML) VLO VALOR TELECOMMUNICATIONS SOUTHWEST, LLC IRVING, TX VLP UNI-TEL OF EL PASO EL PASO, TX VLR CAVALIER TELEPHONE, LLC GRAND RAPIDS, MI VLS VALUE LINE OF SOUTH TEXAS VLT VALUE LINE OF TEMPLE VLU VALUE TEL NAPERVILLE, IL VLW USE IAC CODE IOX LONGVIEW, TX VLX VALUELINX COMMUNICATIONS CORPORATION GREENWOOD, AR VLY VALLEY PAGING CO VMC VALLEY MOBILE COMMUNICATIONS INC LANCASTER, CA VMT VINELAND MOBILE TELCO VNA VANILLA INC. OAKTON, VA VNC VENTURE COMMUNICATIONS CORP ROCHESTER, NY VNE VIRGINIA NETWORK INCORPORATED MARION, VA VNG THE VANGUARD GROUP VALLEY FORGE, PA VNI VOICE NET, INC. FORT SMITH, AR VNK VELOCITY NETWORKS OF KENTUCKY, INC. INDEPENDENCE, MO VNN VOICESTREAM NATIONAL NETWORKS BELLEVUE, WA VNP VENUS TELEPHONE CORPORATION VENUS, PA VNS LCI INTERNATIONAL (PREV CHARTER NETWORK) DUBLIN, OH VNT VALNET FRESNO, CA VNW VOICE NETWORKS, INC. STERLING, CO VNY VOICE NET COMMUNICATIONS SYSTEMS INC DBA VOICE-TEL OF NEW BRONX, NY YORK VOA TCA LONG DISTANCE (PREV. VALUE LINE OF AMARILLO) AMARILLO, TX VOB CARRIER SERVICES CORP (PREV VALU LINE OF BRENHAM) PORT ORANGE, FL VOC VOICE-TEL LEXINGTON, KY VOD INFORMATION TELCO SERVICES, INC. NORTHBROOK, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 9–216 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location VOE VOICETEL COMMUNICATIONS INC. WEST ORANGE, NJ VOI GLOBAL ACCESS TELECOM & VOIP CORPORATION BELLFLOWER, CA VOK VALOR TELECOMMUNICATIONS CLEC OF OKLAHOMA, LLC IRVING, TX VOL VALUE LINE OF LUBBOCK VOM VCOM.COM CORPORATION NEW YORK, NY VON AVONTEL, INC. FAIRFAX, VA VOT VALUE LINE OF WEST TEXAS TERMINAL, TX VOV VOICE VISION INTERNATIONAL INC. LOS ANGELES, CA VOY VOYAGER COMMUNICATIONS WHITE PLAINS, NY VPA VIRGINIA PCS ALLIANCE, L.C. WAYNESBORO, VA VPC VIP CONNECTIONS HONOLULU, HA VPG VALLEY PAGING VPH TELECARE SERVICES, LTD. (PREV V.I.P. PHONE CLUB, INC) TIMONIUM, MD VPI VOXPATH NETWORKS INC AUSTIN, TX VPL USE IAC CODE IBI BURLINGTON, MA VPM VPS COMMUNICATIONS, INC RICHMOND, VA VPP VIP ENTERPRISES INC KIRKSVILLE, MO VPS VITAL PROCESSING SERVICES, L.L.C. PHOENIX, AZ VPT VOICE POWER TELECOMMUNICATIONS, INC. AUSTIN, TX VRA VENTURA CELLULAR CAMARILLO, CA VRC VARIAN CANADA BUFFALO, NY VRD VERDI SOUNDS KENNEDALE, TX VRE AVATAR TELECOM, INC. BEVERLY, MA VRI VOICE RETRIEVAL & INFORMATION SERVICES INC CARROLLTON, TX VRK VOICE TRACK DALLAS, TX VRM VARMICON INDUSTRIES INC HARLINGEN, TX VRN VERNON TELEPHONE COMPANY VERNON, NY VRO VERIZON SOUTH INC. DURHAM, NC VRS VERSATEL INCORPORATED CASPER, WY VRT VARTEC DESOTA, TX VRU VR TELECOMMUNICATIONS, INC. AVON, CO VRZ USE IAC CODE EBA SOUTHFIELD, MI VSC RUDDATA CORPORATION DBA VISION COMMUNICATIONS PADUCAH, KY VSE VALU-LINE OF SOUTHEAST TEXAS BEAUMOUNT, TX VSJ VALUE LINE OF ST JOSEPH’S VSL VRS BILLING SYSTEMS SAN JOSE, CA VSR VENSER INC HATO REY, PR VST VALLEY STAR TEL HARLINGEN, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–217 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location VSY VSYS COLORADO SPRINGS, CO VTA VINCENNES TELEPHONE ANSWERING SERVICE INC VTC VALUE LINE OF TRI-CITIES VTD VALLEY TELEPHONE LONG DISTANCE RAYMONDVILLE, TX VTE VANGUARD TELECOM CORP. GREENSBORO, NC VTG VTG, INC. DBA VOICE-TEL OF HOUSTON HOUSTON, TX VTH VELOCITY TELEPHONE INC NEW BRIGHTON, MN VTI VT OF LONG ISLAND INC. BRONX, NY VTK VANTEK COMMUNICATIONS SIOUX FALLS, SD VTL VIDEOTRON TELECOM LTEE (PREV VERTELCO INC) MONTREAL, PQ VTN VIVO-TN, LLC. BIRMINGHAM, MI VTO VITCOM CORPORATION NEW YORK, NY VTP VANCOUVER TELEPHONE COMPANY LTD. VANCOUVER, BC VTQ VITAL WAYNESBORO, VA VTR VICTORIA CELLULAR CORP VICTORIA, TX VTS VENTURES IN PAGING OKLAHONA CITY, OK VTT VAST-TEL COMMUNICATIONS, INC BRIDGEPORT, TX VTU VIRTUAL NETWORK SYSTEM OAKBROOK, KY VTV VALLEY TELEPHONE CO., INC. LANETTE, AL VTX VALOR TELECOMMUNICATIONS CLEC OF TEXAS, LP IRVING, TX VUA VALU-LINE OF ANGLETON LAKE JACKSON, TX VUE VALULINE COMMUNICATIONS, INC. AUSTIN, TX VUH VIRTUAL TECH, INC. BLACKSBURG, VA VUL VILLAGE UTILITY, INC. WHEELING, IL VUN VECTRIS TELECOM, INC (PREV VECTRIS COMM.) AUSTIN, TX VUS VISA USA INC SAN FRANCISCO, CA VUT VISTA UNITED TELECOMMUNICATIONS LAKE BUENAVISTA, FL VVA VACATION VILLAGES OF AMERICA INC PORTLAND, OR VVI VIVA TEL LONG DISTANCE HURST, TX VVV VCV COMMUNICATIONS, INC. MIAMI, FL VWF VALUE LINE OF WITCHITA FALLS TEMPLE, TX VWI VOLUNTEER WIRELESS INC COOKEVILLE, TN VWS VOICE WARE SYSTEMS WEST PALM BEACH, FL VXN VORTEX NETWORK, INC. CONROE, TX VXS VNS TELECOM, LLC. CANOGA PARK, CA VYI VALLEY INDUSTRIAL COMMUNICATIONS SALES, INC. REDDING, CA VYL VALLEY LINK COMMUNICATIONS BOISE, ID VYN VALLEYNET WAYNESBORO, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–218 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location VYP VALLEY YELLOW PAGES FRESNO, CA VYS TRINITY VALLEY SERVICES INC ATHENS, TX VYT VALUE LINE OF TYLER VYW VALLEY WATS HARLINGEN, TX VZN VERIZON NORTHWEST INC. EVERETT, WA WAC WACO COMMUNICATIONS INC WAD WADENA LONG DISTANCE BEMIDJI, MN WAE WAMNET COMMUNICATIONS INC BOCA RATON, FL WAL WEST ALABAMA COMMUNICATIONS WAM WESTERN AMERICAN TELEPHONE WAN WIRELESS ALLIANCE, LLC ALEXANDRIA, MN WAP WATS(WIDE AMERICA TELECOM SYSTEMS OF PORTLAND) WAR WARREN COUNTY TELECOMMUNICATIONS DEPT. LEBANON, OH WAS WIDE AMERICA TELECOM SYSTEMS WAT THE WATSPHONE CO WAU WTI ADVANTAGE PRODUCTS, LLC. NOVATO, CA WAV WAVETEL, L.L.C. HUNTERSVLLE, NC WBC WALLER BROADCASTING WBF WEB FIRE COMMUNICATIONS INC DBA WEB FIRE LONG DISTANCE WICHITA FALLS, TX WBG TRENTON TELEPHONE COMPANY TRENTON, GA WBH WASHINGTON/BALTIMORE HIGH INTENSITY DRUG TRAFFICKING GREENBELT, MD AREA WBI WISCONSIN BELL INC MILWAUKEE, WI WBL WEBTEL WIRELESS INC PRESCOTT VALLEY, AZ WBM UTILITY SOURCE, INC (PREV WBC COMMUNICATIONS, INC) LAS VEGAS, NV WBS WEBSTER RADIO FRESNO, CA WBT CELLULAR ONE WASHINGTON/BALTIMORE HANOVER, MD WBU WORLD BUSINESS CENTER, INC. MIAMI, FL WBY THE WOODBURY TELEPHONE COMPANY WOODBURY, CT WCA WILLIAMS COMMUNICATIONS LLC (WHOLLY OWNED SUB WILLIAMS TULSA, OK COM GROUP) WCB WINDY CITY BEEPER, INC. CHICAGO, IL WCC WEST COAST COMMUNICATIONS INC SANTA BARBARA, CA WCD WICOMICO COUNTY MARYLAND DEPARTMENT OF CORRECTIONS SALISBURY, MD WCE WORLDCALL COMMUNICATIONS INTERNATIONAL, INC. YONKERS, NY WCG VOICESTREAM WIRELESS CORPORATION (PREV WESTERN WIRLESS BELLEVUE, WA CORP DBA WCH WEBSTER-CALHOUN LONG DISTANCE (PREV WEBSTER-CALHOUN GOWRIE, IA COOPERATIVE)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–219 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WCI WOLD COMMUNICATIONS INC WCJ WASHINGTON COUNTY JOINT VENTURE ALTOONA, PA WCL WEST CENTRAL CELLULAR - LIMITED PARTNERSHIP APPLETON, WI WCM W C COMMUNICATIONS WCN WEST CENTRAL CELLULAR SAN ANGELO, TX WCO WESTCOM INC SAN ANTONIO, TX WCP WEST CENTRAL PAGERS WCR WORCESTER COMMUNICATIONS WCS WILES COMMUNICATION SERVICE BILLINGS, MT WCT WESTSIDE COMMUNICATION OF TAMPA WCU WEST COAST TELECOMMUNICATIONS,INC SANTA BARBARA, CA WCV WITTENBERG CABLE TV COMPANY, INC WITTENBERG, WI WCW TWC COMMUNICATIONS INC. EDISON, NJ WCX ACC OF WAUSAU CORPORATION (PREV WAUSAU CELLULAR LICENSE SCHAUMBURG, IL CORP) WCY CENTRAL WISCONSIN COMMUNICATIONS DBA WCTC LONG DISTANCE WISCONSIN RAPIDS, WI WDC WORLDCOM INC. (PREV. TELECOLUMBUS, USA DBA WORLDCOM) TULSA, OK WDI WIDEOPENWEST ILLINOIS, LLC. NAPERVILLE, IL WDK WORLD-LINK, INC. NEW YORK, NY WDL WORLDDIAL NETWORK SERVICES CORP. OKLAHOMA CITY, OK WDM WORLDCOM INC SAN JUAN, PR WDO WORLD ONE TELECOMMUNICATIONS LOS ANGELES, CA WDS WORLAND SERVICES WORLAND, WY WDT WESCOM DATA TELEPHONE NEWPORT BH, CA WDU WORLD DISCOUNT TELECOMMUNICATIONS INC CHICAGO, IL WDW WORLD WIDE CONNECT, INC. BROOKLYN, NY WEA WES-TEX TELECOMMUNICATIONS, INC. STANTON, TX WEB WEBNET COMMUNICATIONS, INC. MCLEAN, VA WEC WEST FLORIDA COMMUNICATION WEE WETEC LLC PARK RAPIDS, MN WEH WEBSHOPPE COMMUNICATIONS, INC. ALEXANDER CITY, AL WEK WEEKS COMMUNICATIONS, INC. ABILENE, TX WEL WIRELESSCO, LP KANSAS CITY, MO WEM WESTERN 6 MOTELS WEN WORLDWIDE NETWORK SERVICES, INC GAITHERSBURG, MD WEO WESTERN COMMUNICATIONS, INC. RAPID CITY, SD WEP WEST COAST PCS LLC ROSEVILLE, CA WER WEBSERVE, INC. CHARLOTTE, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–220 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WES WESTEL INC WET WESTERN TELECOMMUNICATIONS CO CARLSBAD, CA WEU WE CONNECT COMMUNICATIONS, INC. PITTSBURGH, PA WEV WEBVALLEY, INC HOPKINS, MN WEX WEST TEXAS COMMUNICATIONS AMARILLO, TX WFA WELLS FARGO ALARM SERVICES, INC. OMAHA, NE WFB WELLS FARGO BANK SAN FRANCISCO, CA WFC WICHITA FALLS CELLULAR TELEPHONE CO WICHITA FALLS, TX WFS WORKING ASSETS FUNDING SERVICES SAN FRANCISCO, CA WGD WILTON LONG DISTANCE WILTON, NH WGE WINGATE COMMUNICATIONS CORP BELMONT, MA WGI THE WITLEY GROUP INC WEST PALM BEACH, FL WGK WGK RADIO GRANITE CITY, IL WGO WCTA LONG DISTANCE CO (SUB OF WINNEBAGO COOPERATIVE TELE. LAKE MILLS, IA ASSOC.) WGP WEST GEORGIA PAGING WGR WIREGRASS TELCOM, INC. DOTHAN, AL WGS WESCOM DATA TELEPHONE NEWPORT BH, CA WGT WESTGATE COMMUNICATIONS, L.L.C. BREWSTER, WA WHA WHOLESALE AIRTIME, INC TEMECULA, CA WHC WICHITA CHEAP TALK WICHITA, KS WHH WHEAT STATE TELEPHONE, INC. UDALL, KS WHI WABASH INDEPENDENT NETWORKS, INC. LOUISVILLE, IL WHL WHEELER COMMUNICATIONS BLOOMINGTON, IL WHM WHATCOM TELECOMM FERNDALE, WA WHN WH LINK, LLC ANNANDALE, MN WHO WALNUT HILL TELEPHONE COMPANY LEWISVILLE, AR WHP WEATHERSPOON TELEPHONE LLC VANCOUVER, WA WHR WHEREVER.NET USA INC. LOS ANGELES, CA WHS WHISLER COMMUNICATIONS OLYMPIA, WA WHT WHITMAN COLLEGE WALLA WALLA, WA WIA T.C.T., INC. MIDLAND, TX WIB WCI CABLE INC ANCHORAGE, AK WIC INTERNATL TELEMEDIA ASSOC, INC (PREV INTERACTIVE BILLING OMAHA, NE SERVICES WIE WIESE INC WIG WINGS COMMUNICATIONS, INC. CHICAGO, IL WIK WIKI WIKI TELECOM, INC. WASHOUGAL, WA WIL WILEY COMMUNICATIONS INC

Proprietary — Licensed Material See proprietary restrictions on title page. 9–221 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WIM WESTERN INTEGRATED NETWORKS OF CALIFORNIA OPERATING LLC DENVER, CO WIN RSL COM U.S.A., INC (PREV WESTINGHOUSE ELECTRIC CORP PITTSBURG, PA COMMUN. SYS) WIO WOMAN’S INTERNATIONAL LONG DISTANCE, INC. SAN ANTONIO, TX WIP WINSOME PAGING INC BAYONNE, NJ WIQ WATS INTERNATIONAL CORPORATION CHERRRY HILL, NJ WIR WIRELESS II, L.L.C. GRAND ISLAND, NB WIS WESTERN TELECOMMUNICATIONS INC(PREV. WESTERN DENVER, CO INFORMATION SYSTEMS) WIT WASHINGTON INTERNATIONAL TELEPORT WASHINGTON, DC WIU WARSUN INTERNATIONAL COMMUNICATIONS CORP. VIENNA, VA WIV WORLDWIDE INTERNET SERVICES, INC. BOCA RATON, FL WIW WEST IOWA TELEPHONE COMPANY REMSEN, IA WIY THE WINN TELEPHONE COMPANY DBA WINN TELECOM WINN, MI WJG WJG TELEPHONE CO WKC W K COMMUNICATIONS INC OVERLAND PARK, KS WKH WKH CORP WKL WORLDLINK LONG DISTANCE CORP. MIAMI, FL WKN WEST KENTUCKY NETWORKS INC MAYFIELD, KY WKP U S WEST LONG DISTANCE INC (PREV W.K.P. INC) DENVER, CO WKS WILKES COMMUNICATIONS, INC DBA WILKES LONG DISTANCE WASHINGTON, GA SERVICE WKT WEST KENTUCKY TWO-WAY RADIO INC WLA WESTERN LONG DISTANCE, INC. LANGLEY, WA WLC WORLD CALL INTERNATIONAL INC TAMPA, FL WLD WAUSAU LONG DISTANCE WAUSAU, WI WLE WORLDNET COMMUNICATIONS INC. DBA T M S EAST SYRACUSE, NY WLG WHELLING CELLULAR TELEPHONE CO PITTSBURGH, PA WLH NORTHSTAR TECHNOLOGY, LLC(PREV THIRD KY CELL DBA WIRELESS CORBIN, KY 2000) WLI WORLD TELECOM GROUP, INC. DBA AMERIVOX MOUNTAINSIDE, CA WLK WLKI FM 100 ANGOLA, IN WLL WHOLESALE COMMUNICATIONS HOUSTON, TX WLM WHOLESALE TELECOM CORPORATION CORAL GABLES, FL WLN WILKES LONG DISTANCE, INC. MILLERS CREEK, NC WLO WEST CAROLINA COMMUNICATIONS, LLC ABBEVILLE, SC WLP WORLDPORT COMMUNICATIONS KENNESAW, GA WLR EL PASO NETWORKS, LLC (PREV WALLER CREEK COMMUNICATIONS AUSTIN, TX INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 9–222 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WLS WORTHINGTON LDS WORTHINGTON, MN WLT WILTEL COMMUNICATIONS SYSTEMS INC TAMPA, FL WLU WIRELESS USA, INC SAN DIEGO, CA WLV WILSAVE, INC CHICAGO, IL WLX WORLD LYNX, L.L.C. LITTLE ROCK, AR WLY WILLIAMS & COMPANY COMMUNICATIONS, INC. SIOUX CITY, IA WMA ANEW TELECOMMUNICATIONS CORP DBA CALL AMERICA SAN LUIS OBISPO, CA WMC WILLIAMS METRO COMMUNICATIONS WMF WESTCHESTER MOBILE FONE SYSTEMS INC WMG WILMINGTON CELLULAR TELEPHONE CO ATLANTIC CITY, NJ WMI WIDEOPENWEST MICHIGAN, LLC. NAPPERVILLE, IL WMM WEST MOUNTAIN MOBILE WMP W-ARK MOBILE PHONE AND PAGE WMT WILLIAMSPORT MOBILE TELE CO WMV WIRELESS COMMUNICATIONS VENTURE WAITE PARK, MN WNC WESTERN COMMUNICATIONS WNE WEST TENNESSEE TELEPHONE COMPANY, INC. BRADFORD, TN WNG WANG COMMUNICATIONS CORP ENGLEWOOD, CO WNH WALNUT HILL CELLULAR INC LEWISVILLE, AK WNI NEW EDGE NETWORK, INC (PREV WEST-NET INC) VANCOUVER, WA WNK WISCONSIN INDEPENDENT NETWORK, LLC. EAU CLAIRE, WI WNL WANTEL INC ROSEBURG, OR WNM WORLD NETWORK COMMUNICATIONS, INC. HUNTINGON BEACH, CA WNN WIRELESS NORTH, INC. PLYMOUTH, MN WNO WINCO, INC. WINCHESTER, IL WNR WINSTAR WIRELESS, INC. FALLS CHURCH, VA WNS WANG INFORMATION SERVICE CORP LOWELL, MA WNT WATS NETWORK OF TEXAS SAN ANTONIO, TX WNW WESTELCOM NETWORK, INC. WESTPORT, NY WOC WORLDSTAR COMMUNICATIONS CORPORATION MIAMI, FL WOD WORLDNET, L.L.C. LAWRENCE, KS WOH WIDEOPENWEST OHIO, LLC. NAPERVILLE, IL WOI WESTERN OKLAHOMA INFORMATION SYSTEMS CLINTON, OK WOM WYOCOM, LLC DBA CONTACT COMMUNICATIONS RIVERTON, WY WON WILTON TELEPHONE COMPANY WILTON, IA WOO WISCONSIN COMMUNICATIONS NETWORK, INC MILWAUKEE, WI WOP WESTERN COMMUNICATIONS PAGING, LLC SAN ANTONIO, TX WOR WORTHEIM CO

Proprietary — Licensed Material See proprietary restrictions on title page. 9–223 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WOS WIRELESS ONE NETWORK, L.P. FT MYERS, FL WOT WORLDLINK TECHNOLOGIES, L.L.C. PARSIPPANY, NJ WOU WORLD TELECOMMUNICATIONS, INC TAMPA, FL WOW WASHINGTON OREGON WIRELESS, LLC. STAYTON, OR WPA WOLPOFF & ABRAMSON BETHESDA, MD WPC WORLD PASS COMMUNICATIONS, CORPORATION MIAMI, FL WPI WIRELESSPLUS, INC. HAYWARD, CA WPL SWITCH PORT LEASING DELTONA, FL WPM WYOMING PINE MTN COMMUNICATIONS WPN WISPRA NETWORKS INC. ST. LAURENT, CN WPT WESTERN PACIFIC TELECOM INC INCLINE VILLAGE, NV WRA WEST-COL RADIO PAGING INC GRAND JUNCTION, CO WRB COMMUNITY TELEPHONE CORPORATION (PREV WRIGHT BUSINESSES, OVERLAND PARK, KS INC) WRC WESTERN RADIO COMMUNICATIONS WRD WRIGHT AND RUNSTAD WRF WISCONSIN RSA #4 - LIMITED PARTNERSHIP GREEN BAY, WI WRG WR GRACE AND COMPANY NEW YORK, NY WRH WORLD TOUCH, INC. BELLEVUE, WA WRI WORLD-LINK SOLUTIONS, INC. NEW YORK, NY WRK WORKING ASSETS SAN FRANCISCO, CA WRL WORLDTEL SERVICES, INC. COSTA MESA, CA WRM WALTER R MORRIS MD WRN WISCONSIN RSA #10 - LIMITED PARTNERSHIP GREEN BAY, WI WRO WISCONSIN RSA #1 -LIMITED PARTNERSHIP APPLETON, WI WRP WESTCOL RADIO PAGING WRS WESTERN RADIO SERVICES CO INC WRT WISCONSIN RSA #2 - PARTNERSHIP APPLETON, WI WRU WEST TEXAS RURAL TELEPHONE HEREFORD, TX WRV WORLD TELECOMMUNICATIONS SERVICES,INC. MIAMI, FL WRW WORLD WINDOW DALLAS, TX WRX WORLDNET SOUTH TEXAS BAY CITY, TX WSA WESTCOAST ASSOCIATES INC. RAHWAY, NJ WSB WYMO-BIG SKY BEEPER WSC WITHERS COMMUNICATIONS WSD WESTEL TELECOMMUNICATIONS LTD NORTH VANCOUVER, BC WSE WATS AMERICA SOUTHEAST BIRMINGHAM, AL WSG WORLD SAVINGS AND LOAN OAKLAND, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–224 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WSH WIRLESS SYSTEMS TECHNOLOGY DANVILLE, AR WSI WISTERIA LD SERVICE NORTH CHARLSTON, SC WSK SMART CITY TELECOMMUNICATIONS LLC DBA SMART CITY TELECOM LAKE BUENA VISTA, FL WSL WESTCOL WSM WESTCOM CORPORATION NEW YORK, NY WSN BROADWING TELECOMMUNICATIONS INC (PREV ECLIPSE TELECOMM AUSTIN, TX INC) WSO WIRELESS, LP DBA INDEPENDENT WIRELESS ONE CORPORATION WASHINGTON, DC WSP WESTSIDE PAGING INC ABERDEEN, WA WSQ WINSTAR (PREV WINSTAR TELECOMMUNICATIONS INC) TYSONS CORNER, VA WSR WESTAR TELECOMMUNICATIONS THOUSAND OAKS, CA WSS WISCONSIN RSA #7 - LIMITED PARTNERSHIP APPLETON, WI WST WESTERN TELENET ABILENE, TX WSU WILSON COMMUNICATION COMPANY, INC. WILSON, KS WSV WORLAND SERVICES WSW WEST WISCONSIN COMMUNICATION SYSTEMS, INC. DOWNSVILLE, WI WSX WISCONSIN RSA #6 - PARTNERSHIP APPLETON, WI WSY WESTERN SYSTEMS INC IGANA, GU WTA WATTS AMERICA WTB WTC COMMUNICATIONS, INC. WAMEGO, KS WTC WESTERN TELECOMMUNICATIONS INC WTD WESTERN TELEPHONE INTEGRATED COMMUNICATIONS, INC. MEDFORD, OR WTE WESTERN EXPRESS COMMUNICATIONS INC WESTLAKE VG, CA WTF ALEC, INC. PADUCAH, KY WTG USE IAC CODE WIN PITTSBURG, PA WTH WISCONSIN TELECOMMUNICATIONS TECH INC (INVALID SEE SCH) JAMESVILLE, WI WTI WESTERN TELECOM INC WTK WESTERN TELECOM INC HOUSTON, TX WTL WORLDCOM INC. (PREV. WILTEL) TULSA, OK WTM WEST TEXAS MICROWAVE AUTIN, TX WTN WESTERN TELEPHONE & TELECOMMUNICATIONS CARSON CITY, NV WTO WESTERN TOTAL COMMUNICATIONS SCOTTSBLUFF, NE WTP WESTERN TELEPAGE WTR WISCONSIN RSA #3 - LIMITED PARTNERSHIP APPLETON, WI WTS WESTERN TELEPHONE SERVICE INC WTT WASHINGTON TELEPHONE CO PRINCE FRED, MD WTU WESTERN TELE-COMMUNICATIONS, INC. ENGLEWOOD, CO WTV WESTERN TELEPHONE & TELEVISION RIVERSIDE, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 9–225 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WTX WESTEX CELLULAR STANTON, TX WTY WAUNETA TELEPHONE COMPANY BENKELMAN, NE WTZ WATS/800 INCORPORATED ORLANDO, FL WUA MCI METRO ACCESS TRANSMISSION SVCS INC(PREV ACCESS RICHARDSON, TX TRAN.SVCS INC) WUB WORLDHUB, LLC WEST PALM BEACH, FL WUC WESTERN UNION CORP UPPER SADDLE RIVER, NJ WUI WESTERN UNION INTERNATIONAL WUL WAKUL, INC. CINCINNATI, OH WUN WORKNET COMMUNICATIONS, INC. CLAYTON, MO WUO WORLDTOUCH COMMUNICATIONS, INC. RICHARDSON, TX WUT AT&T EASYLINK SERVICES MAHWAK, NJ WVA TWIN VALLEY TELEPHONE, INC. MILTONVALE, KS WVC WEST VIRGINIA CELLTELL CO GREENSBORO, NC WVD WEST RIVER LONG DISTANCE HAZEN, ND WVH WAVERLY HALL TELEPHONE CO., INC. WAVERLY HALL, GA WVL WARWICK VALLEY LONG DISTANCE CO INC WARWICK, NY WVM WAVECOMM WEST LEBANON, NH WVO WEST VIRGINIA ONE NONWIRELINE CELLULAR LIMITED PARTNERSHIP ROSWELL, GA WVS WAVESENT, LLC. BOISE, ID WVT WILLAMETTE VALLEY TELECOM SERVICES LEBANON, OR WVY TWIN RIVERS VALLEY TELEPHONE, INC. LIVERMORE, IA WWC WESTWAVE COMMUNICATIONS SANTA ROSA, CA WWD WOODWARD COMMUNICATIONS INC WWE WORLD WIDE DEVELOPMENT, INC. ASHLAND, KY WWI WORLDWIDE TELCO INC NEW YORK, NY WWK WIRELESS ACCESS NETWORK, INC. FORT MYERS, FL WWO WORLD-WIDE TELCO INC. NEW YORK, NY WWP WASHINGTON WATER POWER WWR WORLD WIDE TELE-TRANS COMPANY BENTONVILLE, AK WWT WESTWOOD TRUCKING LLC OPELOUSA, LA WWW TEMPORARILY ASSIGNED TO EXACT FOR TESTING PURPOSES PISCATAWAY, NJ WWY ALL WEST/WYOMING INC KAMAS, UT WXC WILCOX COMMUNICATIONS WXL WORLDXCHANGE CORP (PREV WXL COMMUNICATIONS LTD) TORONTO, ON WXO WESTERN INTEGRATED NETWORKS OF TEXAS OPERATING L.P. DALLAS, TX WYC WYOMO COMMUNICATIONS WYL WYLON

Proprietary — Licensed Material See proprietary restrictions on title page. 9–226 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location WYM WYOMING MOBILEPHONE WYN WAYNE PAGING SAN ANTONIO, TX WYS WEYMOUTH SERVICE SOUTH WEYMOUTH, MA WZT WIZTRONICS, INC. BELLINGHAM, WA XAC TRANSACTION SYSTEMS INC VIENNA, VA XAD XADAX INC NEW YORK, NY XCD X2COMM, INC. DBA DIRECT CONNECT COMMUNICATIONS HILLSBOROUGH, NJ XCK AXCESSNETWORKS LLC LONGVIEW, TX XCL X-CELL CELLULAR INC DENVER, CO XCN TEXAS LONG DISTANCE (CONROE) CONROE, TX XCT XCOM TECHNOLOGIES (LEVEL 3) (PREV XCOM TECHNOLGIES) CAMBRIDGE, MA XDS XDSL NETWORKS, INC. BALTIMORE, MD XIC XIT TELECOMMUNICATION & TECHNOLOGY INC. D/B/A XIT DALHART, TX COMMUNICATIONS XIL XILA COMMUNICATIONS, LLC INDIANAPOLIS, IN XIT XIT TELECOMMUNICATION & TECHNOLOGY INC DALHART, TX XIX XIEX TELECOMMUNICATIONS INC BELLAIRE, TX XLC X-L COMMUNICATIONS INC SPOKANE, WA XLL X5 LLC SEATTLE, WA XNT USE IAC CODE EKW HOUSTON, TX XPC XSPEDIUS CORP (PREV XSPEDIA CORP) LAKE CHARLES, LA XPM XPM INC HORSESHOE BAY, TX XPS XPEDITE SYSTEMS, INC. EATONTOWN, NJ XPT EXPETEL COMMUNICATIONS, INC. JACKSON, MS XRT TRX, INC. OELWEIN, IA XRX XEROX CORPORATION STAMFORD, CT XSY AXSYS, INC. MOBILE, AL XTE XTEL INC HOLLYWOOD, FL XTI AX TELECOMMUNICATIONS, INCORPORATED FAIRFAX, VA XTL XTEL COMMUNICATIONS, INC. MARLTON, NJ XTM CTC TELCOM, INC. DALLAS, WI XTR XTRACOM, INC CHICAGO, IL XXS AXXIS COMMUNICATION INC HOOD RIVER, OR XXX USE IAC CODE ATZ PHILADELPHIA, PA XYA XYNERGIA, INC. MIAMI, FL XYP XYPOINT CORPORATION SEATTLE, WA XYZ INTERNATIONAL MARKETING & ADVERTISING INC. CORAL GABLES, FL XZP ZERO PLUS DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–227 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location YAC YAZOO ANSWER CALL YAK YAK COMMUNICATIONS CANADA INC. TORONTO, ON YAV YADKIN VALLEY TELECOM, INC. YADKINVILLE, NC YBC CYBERTEL COMMUNICATIONS, CORP. LA JOLLA, CA YBG YOUNGSTOWN CELLULAR TELEPHONE CO YOUNGSTOWN, OH YCC YAKIMA COUNTY COMMUNICATIONS YCG YOUR CALL GROUP KENNEDALE, TX YCI YORKVILLE COMMUNICATIONS, INC. YORKVILLE, TN YCM YCOM NETWORKS YELM, WA YEL YUMA ELECTRONICS INC YES YES COMMUNICATIONS SERVICES SAN JOSE, CA YET YELL COUNTY TELEPHONE COMPANY DANVILLE, AR YIN YASIN’S INC PITTSBURGH, PA YIP COOK TELECOM, INC. SAN RAFAEL, CA YLD YOUR LONG DISTANCE CONNECTION MT HOME, AK YLS THE TELEPHONE CONNECTION LOCAL SERVICES, LLC. LOS ANGELES, CA YNK YANKEE MICROWAVE INC PORTLAND, ME YNO SYNOPSIS COMMUNICATIONS INCORPORATED CHICAGO, IL YOG YOGAO INC YPC YELLOW PAGER COMMUNICATIONS SYSTEMS S. LAKE TAHOE, CA YPN YEIPOST NETWORK SOLUTIONS LLC STONE MOUNTAIN, GA YPR CYPRESS TELECOMMUNICATIONS NORCROSS, GA YPS YIPES TRANSMISSION, INC. SAN FRANCISCO, CA YPW YOUNG, CHRIS; PASCHALL, LARRY A DBA W TENNESSEE DYERSBURG, TN COMMUNICATIONS YRC COUNTRY ROAD COMMUNICATIONS INC OAK HILL, VA YRI CYRIS, LLC VIRGINIA BEACH, VA YRT YUMA RADIO TELEPHONE SVC YUMA, AZ YTA YAKIMA TAS YTC YELCOT TELEPHONE COMPANY MOUNTIAN HOME, AR YTE DANCRIS TELECOM, L.L.C. (PREV YAVAPAI TELEPHONE EXCHANGE) SCOTTSDALE, AZ YTS YUCCA TELECOMMUNICATIONS SYSTEMS, INC PORTALES, NM YTU CYTELA COMMUNICATIONS, INC. SAN DIEGO, CA YWL YUKON-WALTZ TEL CO YUKON, PA ZAK USE IAC CODE PWT STOCKTON, CA ZCL ZIP-CALL INC (NOT A VALID IAC CODE)) ZPC ZIPCOM LOUISVILLE, KY ZPS ZULPORES (NOT A VALID IAC CODE) DALLAS, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 9–228 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ZRP ZANESVILLE RADIO PHONE (NOT A VALID IAC CODE) ZTA LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTB LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTC LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTD LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTE LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTF LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTG LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTH LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTI LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTJ LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTK LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTL LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTM LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTN LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTO LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTP LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTQ LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTR LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTS LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTT LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTU LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE

Proprietary — Licensed Material See proprietary restrictions on title page. 9–229 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 IAC Codes Sorted by Code

Table 9-1 IAC Codes Sorted by Code (Continued)

Code Company Name Headquarters Location ZTV LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTW LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTX LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTY LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZTZ LOCALLY ASSIGNED FOR INTERNAL TESTING PURPOSES - INVALID IAC CODE ZZZ DEFAULT VALUE FOR CASUAL CUSTOMER. NOT A VALID IAC CODE.

Proprietary — Licensed Material See proprietary restrictions on title page. 9–230 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Consolidated IAC Codes Sorted by Code

10 Consolidated IAC Codes Sorted by Code Table 10-1 Consolidated IAC Codes Sorted by Code

Code Company Name/Reference Previous Name(s) AAZ USE IAC CODE TZB NETWORK SERVICES, LLC (PREV TSR WIRELESS) (PREV AMRICAN PAGING INC OF ARIZONA) ACP USE IAC CODE TZB NETWORK SERVICES, LLC (PREV TSR WIRELESS) (PREV AMERICAN PAGING INC OF ILLINOIS) ACY USE IAC CODE COC ALL CITY COMMUNICATIONS DBA PRONET COMM AEG USE IAC CODE AXL AMERICAN LONG DISTANCE EXCHANGE INC AFP USE IAC CODE AJP ALTERNATIVE PHONE, INC. ANP USE IAC CODE TZB NETWORK SERVICES, LLC (PREV TSR WIRELESS) (PREV AMERICAN PAGING INC) ANQ USE IAC CODE COC CONTACT COMMUNICATIONS INC(PREV AMERICAN 900 PAGING) AOS USE IAC CODE AOW AT&T COMMUNICATIONS OF THE SOUTH WEST INC APT USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS) (PREV AMERICAN PAGING INC OF TEXAS) APU USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS) (PREV AMERICAN PAGING INC OF UTAH) APW USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS) (PREV AMERICAN PAGING OF WISCONSIN) AWX USE IAC CODE ATS LCI INTERNATIONAL (PREV ATS NETWORK COMMUNICATIONS) BAM USE IAC CODE EBA BELL ATLANTIC MOBILE SYSTEMS INC BUE USE IAC CODE TJP BLUE MOUNTAIN CELLULAR DBA CELLULAR ONE CAY USE IAC CODE ONM ONECOMM (PREV CEN CALL MOBILE COMMUNICATIONS) CDH USE IAC CODE CCV MEDIAONE OF DEL INC PARENT OF MEDIAONE TELECOM MASS. CDN USE IAC CODE IOR MCLEODUSA TELECOM. SERVICES INC (PREV CONSOLIDATED COMM TELECOMM SERVICES) CDU USE IAC CODE BNY ACC OF MINNESOTA CORP (PREV CELL ONE OF DULUTH/ SUPERIOR) CEX USE IAC CODE GMT GTE MOBILNET (PREV CON TEL CELLULAR) CGR USE IAC CODE EQN EQUALNET CORP (PREV TOTAL WORLD TELECOM) (PREV CONTINENTAL TELECOM GROUP) CHM USE IAC CODE PGN PAGE NET (PREV. PAGING NETWORK OF SAN FRANCISCO) (PREV COMTECH MOBILE TEL.) CRR USE IAC CODE GMT GTE MOBILNET (PREV. CONTEL CELLULAR) CSY USE IAC CODE ILO ILD TELECOMMUNICATIONS (PREV WORLDCOM, INC ) (PREV COM SYSTEMS NETWORK SERVICES) CUF USE IAC CODE CUY CENTENNIAL CELLULAR CORP CXF USE IAC CODE CJI COX FIBERNET CXJ USE IAC CODE CJI COX COMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 10–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Consolidated IAC Codes Sorted by Code

Table 10-1 Consolidated IAC Codes Sorted by Code (Continued)

Code Company Name/Reference Previous Name(s) CZU USE IAC CODE QRV CELLULAR-10 INC DBA OHIO RIVER CELLULAR CORP DCG USE IAC CODE ANK DIVERSIVIED COMM GROUP DFT USE IAC CODE LYN DFT LONG DISTANCE CORPORATION DHC USE IAC CODE ITA INTERNATIONAL TELEMEDIA ASSOCIATES, INC D.H.C. COMM. DLA USE IAC CODE TJP DELTA COMMUNICATIONS EBR USE IAC CODE ECI ECI COMMUNICATIONS, INC.(PREV ECONO-CALL INC) FAT USE IAC CODE FAL FLATEL, INC FCR USE IAC CODE HWC ACC OF WISCONSIN LLC (PREV FOUR CELLULAR CORPORATION) FNA USE IAC CODE MAF AFN COMMUNICATIONS, LLC FNS USE IAC CODE TMU EXTELCOM DBA EXPRESS TEL FLAGCOM NETWORK SVC. THRIFTY TELEPHONE FTL USE IAC CODE IOX IONEX COMMUNICATIONS NORTH, INC (PREV. FIRSTEL) FVL USE IAC CODE HWC ACC OF WISCONSIN LLC (PREV FIVE CELLULAR CORPORATION) GBT USE IAC CODE GBN GLOBENET GNX USE IAC CODE GCF GTC TELECOM (PREV GEN X, LLC) GRC USE IAC CODE DTC NEW PAR DBA AIRTOUCH CELL (PREV GRAND RAPIDS CELL TELE CO) GSL USE IAC CODE CEJ GREAT SEAL CELLULAR LIMITED PARTNERSHIP DBA CHILL CELL. GSP USE IAC CODE UTC SPRINT COMMUNICATIONS INC (PREV US SPRINT/GTE SPRINT) GTF USE IAC CODE GTP VERIZON CALIFORNIA INC (PREV GTE CALIFORNIA INC) HER USE IAC CODE EQN EQUALNET CORP (PREV TWT-HEARTLINE) HEARTLINE COMM. INC HIL USE IAC CODE COC HI TECH COMMUNICATIONS OF IL DBA PRONET COMM. IBS USE IAC CODE IBM INTERNATIONAL BUSINESS MACHINES (IBM) ICH USE IAC CODE ILO ILD TELECOMM., INC. (PREV INTELLICALL OPERATOR SERV) (PREV INTELLICHARGE INC) ICR USE IAC CODE ICS INDUSTRIAL & COMMERCIAL COMMUNICATIONS SERVICE ILK USE IAC CODE ILO ILD TELECOMM., (PREVINTERLINK TELECOMM., INC) IMC USE IAC CODE IMR INTERNATIONAL MICROWAVE (PREV TIMES MIRROR) IMT USE IAC CODE INC MOBILEMEDIA COMMUNICATIONS, INC. (PREV ICS COMMUNICATIONS) ISA USE IAC CODE UTC SPRINT COMMUNICATIONS INC (PREV ISACOMM INC) ITG USE IAC CODE ONR INTERNATIONAL TELECHARGE INC IUT USE IAC CODE TQW XO COMMUNICATIONS, INC (PREV ITC NETWORKS) KMK USE IAC CODE KMM KMC TELECOM III (SUB OF KMC TELECOM HOLDINGS INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 10–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Consolidated IAC Codes Sorted by Code

Table 10-1 Consolidated IAC Codes Sorted by Code (Continued)

Code Company Name/Reference Previous Name(s) KMT USE IAC CODE KMM KMC TELECOM II, INC (SUB - KMC TELECOM HOLDINGS INC) LCF USE IAC CODE UTC SPRINT COMMUNICATIONS INC (PREV LA CONEXION FAMILIAR INC LDU USE IAC CODE UTC SPRINT COMMUN. INC (PREV SPRINT HOSPITALITY GROUP) (PREV LONG DISTANCE USA INC) LGS USE IAC CODE LGF LONG DISTANCE INTERNATIONAL INC. LSC USE IAC CODE DTC NEW PAR DBA AIRTOUCH CELLULAR (PREV LANSING CELL TELE CO) MBY USE IAC CODE MXN MTS COMMUNICATIONS, INC.(PREV MANITOBA TEL SYSTEMS ) MHP USE IAC CODE COC CONTACT COMMUN. INC(PREV. METROPOLITAN)METROPOLITAN HOUSTON PAGING SERVICES. MIT USE IAC CODE MID MIDCO-TEL MKN USE IAC CODE HWC ACC OF WISCONSIN LLC (PREV PEBBLES CELLULAR CORP) (PREV MACKINAC CELLULAR) MLS USE IAC CODE IOR MCLEODUSA TELECOM. SERVICES, INC. (PREV MCLEOD NETWORK) MSW USE IAC CODE BNY ACC OF MINNESOTA CORP (PREV MINNESOTA SIX CELLULAR CORP) MUD USE IAC CODE MFF MEG RADIO, INC MUM USE IAC CODE EWC ACC OF WEST VIRGINIA CORP (PREV NORTHLAND CELL CORP) (PREV MOUNTAINEER MOBILE) NDW USE IAC CODE MDW MIDWEST TELEPHONE SERVICE INC NKS USE IAC CODE TIA TELECOM AMERICA, INC. (PREV -NETWORK SOLUTIONS INC) NPI USE IAC CODE NPA NETWORK SERVICS LLC (PREV NATIONAL PAGING) NTW USE IAC CODE NTI NETWORK TELECOM SYSTEMS INC NYC USE IAC CODE BAX BELL ATLANTIC COMMUN. INC (PREV NYNEX-CORRIDOR) (PREV NEW YORK TEL-CORRIDOR) NYX USE IAC CODE BLX BELL ATLANTIC COMMUNICATIONS INC (PREV NYNEX) OCX USE IAC CODE HWC ACC OF WISCONSIN LLC (PREV ONE CELLULAR CORPORATION) ODP USE IAC CODE OSO COMMSOUTH CO (PREV ONYX DISTRUB CO DBA TEXAS COMM SOUTH) OPO USE IAC CODE CPV COOPERATIVE COMMUNICATIONS INC OSW USE IAC CODE CRC OPERATOR SERVICES WEST PUR USE IAC CODE PRT PUERTO RICO TELEPHONE COMPANY PWE USE IAC CODE PWT PAC-WEST TELECOMM, INC. PWT USE IAC CODE ARZ PAC WEST TELECOMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 10–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Consolidated IAC Codes Sorted by Code

Table 10-1 Consolidated IAC Codes Sorted by Code (Continued)

Code Company Name/Reference Previous Name(s) PXF USE IAC CODE PFI BROOKS FIBER COMM. OF NEVADA(PREV PHOENIX FIBERLINK) PZS USE IAC CODE TGH TELECORP PCS RRC USE IAC CODE COC ROGERS RADIO COMMUNICATIONS SERV INC DBA PRONET COMM. SAO USE IAC CODE SNB FIRSTWORLD ORANGE COAST (PREV AFFILIATE FIRSTWORLD COMM) (PREV SPECTRANET OC) SDP USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS) (PREV SAN DIEGO PAGING INC) SGV USE IAC CODE SNB FIRSTWORLD SGV (PREV AFFILIATE OF FIRSTWORLD COMM) (PREV SPECTRANET) SHP USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS) (PREV SOUTHWEST PAGING) SNA USE IAC CODE SNB FIRSTWORLD ANAHEIM (PREV AFFILIATE OF FIRSTWORLD COMM) (PREV SPECTRANET ANAHEIM) SOW USE IAC CODE EQN EQUALNET CORP (PREV SOUTHWESTERN TELECOM) SPC USE IAC CODE UTC SPRINT COMMUN. INC (PREV SO PACIFIC COMM CO) (PREV SOUTHERN PACIFIC COMMUN. CO) STX USE IAC CODE SRN SPRINT CANADA INC(PREV STN INC) (PREV PRIMARY CONNECTIONS DIV OF SPRINT CAN STN) SUA USE IAC CODE UTC SPRINT COMM INC(PREV SPRINT/UNITED ADM SVCS GRP) UNITED ADM. SERVICES GROUP SUS USE IAC CODE FED QWEST COMMUNICATIONS (PREV PHOENIX NETWORK & WORLDCOM) SVV USE IAC CODE USX USTEL/ARCADA (PREV ARCADA COMMUN) (PREV NETWORK TELECOMMUNICATIONS SERVICES) SWB USE IAC CODE IOX IONEX COMMUN. INC (PREV FEIST LONG DISTANCE) SWITCHBOARD OF OKLAHOMA CITY TBG USE IAC CODE QCC TELEMARKETING COMM. OF BOWLINGREEN TDA USE IAC CODE TED TELEDIAL TDD USE IAC CODE WUA MCI METRO ACCESS TRANSMISSION SVCS(PREV TELECONNECT & BCS LONG DISTANCE SVCS) TDL USE IAC CODE ICG ICG TELECOM GROUP, INC (PREV TELEPORT OF DENVER LTD) TDQ USE IAC CODE DTC NEW PAR DBA AIRTOUCH CELLULAR (PREV TOLEDO CELL TELE CO TDY USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS PREV TRI-STATE RADIO CO TLN USE IAC CODE UTC SPRINT COMMUNICATIONS INC (PREV TELNET) TNU USE IAC CODE UTC SPRINT COMM., INC (PREV TRANS NATIONAL COMM.) RANS NATIONAL COMMUNICATIONS TRP USE IAC CODE TZB NETWORK SERVICES, LLC. (TSR WIRELESS) PREV TRI- STATE RADIO CORP OF PENNSYLVANIA

Proprietary — Licensed Material See proprietary restrictions on title page. 10–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Consolidated IAC Codes Sorted by Code

Table 10-1 Consolidated IAC Codes Sorted by Code (Continued)

Code Company Name/Reference Previous Name(s) TST USE IAC CODE TZB NETWORK SERVICES, LLC. (PREV TSR WIRELESS ) PREV TRI-STATE RADIO CORP TWK USE IAC CODE TIM TIME WARNER COMMUNICATIONS (PREV. TWC OF NYC) TIME WARNER COMM OF NEW YORK CITY UCL USE IAC CODE SVU US CELLULAR DBA SEVEN CELLULAR CORP. UIA USE IAC CODE INA U S WEST INTERPRISE AMERICA, INC. USP USE IAC CODE UTC SPRINT COMMUNICATIONS INC (PREV US SPRINT) UST USE IAC CODE ITT UNITED STATES TRANSMISSION SYSTEMS INC VAD USE IAC CODE BNK VERIZON ADVANCED DATA INC VCR USE IAC CODE HWC ACC OF WISCONSIN LLC (PREV VILAS CELLULAR CORPORATION) VLW USE IAC CODE IOX IONEX COMMUN SOUTH INC (PREV VALU-LINE OF LONGVIEW VPL USE IAC CODE IBI IBASIS, INC (PREV VIP CALLING) VRZ USE IAC CODE EBA VERIZON WIRELESS WTG USE IAC CODE WIN RSL COM U.S.A. (PREV WESTINGHOUSE ELECTRIC CORP XNT USE IAC CODE EKW TXNET COMMUNICATIONS INC XXX USE IAC CODE ATZ ATX INC ZAK USE IAC CODE PWT PAC-WEST TELECOMM, INC

Proprietary — Licensed Material See proprietary restrictions on title page. 10–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Consolidated IAC Codes Sorted by Code

Proprietary — Licensed Material See proprietary restrictions on title page. 10–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

11 Exchange Carrier Codes Sorted by Company Name Table 11-1 Exchange Carrier Codes Sorted by Company Name

Company Name Alpha Numeric Headquarters Location 1 COM, INC COMI 4090 WRENTHAM, MA 1-800-RECONEX, INC RCNX 7602 HUBBARD, OR 2ND CENTURY COMMUNICATIONS, INC. SDCC 4745 TAMPA, FL 3 RIVERS TEL COOP INC ARVS 2255 FAIRFIELD, MT 360 COMM CO OF CHARLOTTESVILLE DBA ALLTEL CHAL 4821 LITTLE ROCK, AR 800SURVEY.COM, INC. SRVY NEW YORK, NY A.R.C. NETWORKS, INC. ARCN 7665 HAUPPAUGE, NY AAMAX PUBLIC COMMUNICATIONS AXPC QUINCY, MA ABITIBI PRICE INC APPR 8201 IROQUOIS FALLS, ON ABSARAKA COOP TEL CO ABSR 1601 ABSARAKA, ND ACC LONG DISTANCE LTD ACLD TORONTO, ON ACC NATIONAL TELECOM CORP. ANTC 7197 ROCHESTER, NY ACCENT COMMUNICATIONS, INC. ACCT 1663 GROTON, SD ACCESS DIALING INC. ACDG VIRGINIA BEACH, VA ACCESS NETWORK SERVICES, INC. ANTS 7714 CHANTILLY, VA ACCESS POINT, INC. ACPT 8780 CARY, NC ACCIPITER COMMUNICATIONS, INC. ACCI 2191 GLENDALE, AZ ACCLAIM TELECOM CORPORATION ALMT 3288 LAWRENCE, MA ACCUTEL OF TEXAS ACTX 7821 DALLAS, TX ACE TEL ASSN ACET 1346 HOUSTON, MN ACE TEL CO OF MICHIGAN INC ATCM 0704 MESICK, MI ACI CORP ACIC 7070 ENGLEWOOD, CO ACKERMAN TEL CO INC ACKR 0444 MS ACROSS THE WORLD TELECOM, INC AWTM BIDDEFORD, ME ACTEL, INC ATEL CEDAR KNOLLS, NJ ADAMS TEL COOP ADMS 0976 GOLDEN, IL ADAMSVILLE TEL CO INC ADVL 0552 MONROE, LA ADDISON HOME TEL CO (NAME CHANGE) AHME 0071 NY ADVAMTEL LLC DBA PLAN B COMMUNICATIONS ADVM 3059 SHREWSBURY, NJ ADVANCED AMERICAN TELECOM, INC. ADAT 7995 EATONTOWN, NJ ADVANCED COMMUNICATION SYSTEMS, INC. ANCS WOBURN, MA ADVANCED COMMUNICATIONS SERVICES INC ACSO 7101 MINNEAPOLIS, MN ADVANCED TELCOM GROUP, INC. ATGI 4268 SANTA ROSA, CA ADVANCED TELECOMMUNICATION NETWORK, ATNI CHERRY HILL, NJ INC. ADVANCED TELEPHONE SYSTEMS INC DBA HTC AHTC 2522 HICKORY, PA COMM.

Proprietary — Licensed Material See proprietary restrictions on title page. 11–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location AEP COMMUNICATIONS INC APCM RIVERSIDE PLAZA 25TH FLOO, OH AES CYGNUS, L.L.C. AESC ARLINGTON, VA AFFINITY NETWORK INCORPORATED AYNT 4279 LAS VEGAS, NV AFFORDABLE PHONE COMPANY, INC. APCI 4100 NORRISTOWN, PA AGATE TEL CO AGTE 2178 AGATE, CO ALBA TEL CO ALBA 0668 MI ALBANY MUTUAL TEL ASSN INC ALBY 1347 ALBANY, MN ALBERTA GOVT TELEPHONES ABGT 8084 EDMONTON, AB ALBION TEL CO INC ALBN 2213 ALBION, ID ALEC, INC. ALEC 7017 PADUCAH, KY ALENCO COMMUNICATIONS INC ACCS 2090 JOSHUA, TX ALHAMBRA-GRANTFORK TEL CO AGNK 0978 ALHAMBRA, IL ALIANT INC ALNT ST JOHNS, CN ALL CITY CUSTOMER TELEPHONE INC ALCC 2205 JAMAICA, NY ALL TELECOMMUNICATIONS, INC. ALLT 9322 MINEOLA, NY ALLEGIANCE TELECOM, INC. AFYL 8378 DALLAS, TX ALLENDALE TEL CO ALDL 0669 ALLENDALE, MI ALLIANCE NETWORK INC ALNI NEW ORLEANS, LA ALLIED TEL CO OF ARKANSAS INC ADAR 1691 AR ALLIED UTILITIES CORP ALUT 1719 AR ALLTEL ALGT ALLTEL ATCT ALLTEL ALABAMA ALAL 0302 MATTHEWS, NC ALLTEL ARKANSAS INC ALAR 1691 LITTLE ROCK, AR ALLTEL CAROLINA INC - NORTH ADNC 0476 MATTHEWS, NC ALLTEL FLORIDA INC ADFL 0336 MATTHEWS, NC ALLTEL GEORGIA INC ADGA 0357 MATTHEWS, NC ALLTEL ILLINOIS INC ALIL 1000 RANTOUL, IL ALLTEL INDIANA INC ALIN 0831 OSSIAN, IN ALLTEL KENTUCKY INC ADKY 0402 LITTLE ROCK, AR ALLTEL MICHIGAN INC ALMI 0681 STOCKBRIDGE, MI ALLTEL MISSISSIPPI INC ADMP 0453 MATTHEWS, NC ALLTEL MISSOURI INC ADMO 1885 LITTLE ROCK, AR ALLTEL NEW YORK - JAMESTOWN ADJA 0109 JAMESTOWN, NY ALLTEL NEW YORK - RED JACKET ADRJ 0113 JAMESTOWN, NY ALLTEL NEW YORK INC - FULTON ADNY 0106 JAMESTOWN, NY ALLTEL OHIO INC - NEWARK ADNO 0637 NEWARK, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 11–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location ALLTEL OHIO INC - WESTERN OHIO ALOH 0665 KENTON, OH ALLTEL OKLAHOMA INC ADOK 1965 LITTLE ROCK, AR ALLTEL PENNSYLVANIA INC ALTL 0176 JAMESTOWN, NY ALLTEL SOUTH CAROLINA INC ADSC 0517 MATTHEWS, NC ALLTEL TEXAS INC ADTX 2121 LITTLE ROCK, AR ALLWORLD COMMUNICATIONS NETWORK, L.L.C. AWCN NEW YORK, NY ALMA TEL CO ALMM 1860 ALMA, MO ALMA TEL CO INC ALLM 0344 ALMA, GA ALONGE REG. HEALTHCARE COMM DBA HEALTH ARHC 8652 ERIE, PA GROUP TELE. ALPHANET TELECOM APHT TORONTO, ON ALPINE COMMUNICATIONS, L.C. ALPC DES MOINES, IA ALTERNATE NETWORK SOLUTIONS, INC. LNSI 5449 ROTTERDAM JUNCTION, NY ALTO TEL CO ALTO 2037 TX AMANA SOCIETY SERVICE CO TEL DIV ASTY 1096 AMANA, IA AMCOM, L.L.C. ACOM DENVER, CO AMELIA TEL CORP AMEL 0217 AMELIA, VA AMERICAN FIBER NETWORK OF VIRGINIA, INC. AFVA OVERLAND PARK, KS AMERICAN FIBER NETWORK, INC. AFNI 3862 OVERLAND PARK, KS AMERICAN LONG LINES, INC. AMLL 3846 HORSHAM, PA AMERICAN NETWORK EXCHANGE, INC. ANEI 7742 LAKE SUCCESS, NY AMERICAN NETWORK SERVICES, INC. AMNS MT. VERNON, NY AMERICAN NETWORK, INC. AMNI 8667 NYC, NY AMERICAN TECHNOSTRUCTURE AMCT 7812 NEW YORK, NY AMERICAN TELECHARGE INC. ERIC MULLICA HILL, NJ AMERINET TELECOMMUNICATIONS GROUP, INC. ANTG 7913 EAST NORTHPORT, NY AMERITECH COMMUNICATIONS ACII 7068 CHICAGO, IL INTERNATIONAL, INC. AMERIVOICE TELECOMMUNICATIONS, INC AMVT 8395 MILWAUKEE, WI AMERY TEL CO AMRY 0842 AMERY, WI AMHERST TEL CO AMHR 0843 AMHERST, WI AMTELECOM INC AYMR 8202 AYLMER, ON ANCHORAGE TEL UTILITY ANCR 3000 ANCHORAGE, AK ANDREW TEL CO INC ANDR 1097 ANDREW, IA ANNOX ANOX 7675 PLEASANT VIEW, TN APCO TELECOMMUNCIATIONS DBA TARGET APCO 3195 BEVERLY, MA TELECOM APPLECOM LTD LPPP ISLANDIA, NY ARAPAHOE TEL CO ARPH 1516 ARAPAHOE, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 11–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location ARBROS COMMUNICATIONS LICENSING AOSL LANDOVER, MD COMPANY, N.E. ARBROS COMMUNICATIONS, INC. AOSC LANDOVER, MD ARCADIA TEL CO ARDA 0585 ARCADIA, OH ARCADIA TEL COOP ARCA 1098 ARCADIA, IA ARCTIC SLOPE TEL ASSN COOP INC ASLP 3001 ANCHORAGE, AK ARDMORE TEL CO INC ARDM 0280 ARDMORE, AL ARIZONA TEL CO ARZA 2171 PHOENIX, AZ ARKANSAS TEL CO INC ARKS 1692 CLINTON, AR ARLINGTON TEL CO ARTN 1517 BLAIR, NE ARMOUR INDEPENDENT TEL CO AIDT 1640 ARMOUR, SD ARMSTRONG TEL CO - NY AMNY 0071 BULTER, PA ARMSTRONG TEL CO - PA AMPA 0189 BUTLER, PA ARMSTRONG TEL CO NORTH AMNO 0195 BUTLER, PA ARMSTRONG TEL CO OF MARYLAND AMTG 0216 BUTLER, PA ARMSTRONG TEL CO OF WEST VIRGINIA AMSG 0256 BUTLER, PA ARROWHEAD COMMUNICATIONS CORP ARHD 1374 HECTOR, MN ARTHUR MUTUAL TEL CO ARTH 0586 DEFIANCE, OH ARVIG TEL CO ARVG 1350 PEQUOT LAKES, MN ASOTIN TEL CO ASOT 2404 MADISON, WI ASSARIA TEL EXCH INC ASSR 1741 ASSARIA, KS AT&T (LOCAL) ATTL 7421 295 N. MAPLE AVE., BASKIN, NJ AT&T CANADA, INC (PRE METRONET COMM. MNCC 8304 CALGARY, AB CORP.) AT&T CORP. (PREV NORTHPOINT COMM, INC.) NPCM 7137 SAN FRANCISCO, CA ATD COMMUNICATIONS, LTD. ATDC NEW YORK, NY ATHENS TEL CO INC ATHN 0422 MONROE, LA ATKINS TEL CO INC ATKN 1101 ATKINS, IA ATLANTIC ALLIANCE TELECOM.(PREV BELL TELE BETC STATEN ISLAND, NY CO INC) ATLANTIC CONNECTIONS ATNC 7788 WORCESTER, MA ATLANTIC TEL MEMBERSHIP CORP AMBR 0468 SHALLOTTE, NC ATLANTIC TELECOM CORP AATC BALA CYNWYD, PA ATLANTIC TELESIS GROUP, INC. ATGP 7630 YONKERS, NY ATLAS TEL CO ATLS 1966 BIG CABIN, OK ATX TELECOMMUNICATIONS SERVICES, LTD ATXT BALA CYNWYD, PA AU GRES TEL CO AUGR 0671 MARION, LA AUGUSTA TEL CO AGST 0672 AUGUSTA, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 11–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location AUSABLE VALLEY TEL CO INC ASVY 0072 KEESVILLE, NY AVATAR TELECOM, INC. AVTR 2954 BEVERLY, MA AVERY TEL CO AVRY 2036 TX AX TELECOMMUNICATIONS, INCORPORATED AXTI FAIRFAX, VA AYERSVILLE TEL CO AYVL 0588 DEFIANCE, OH AYRSHIRE FARMERS MUTUAL TEL CO AYRS 1105 AYRSHIRE, IA AZARK TELEPHONE COMPANY OZAT SENECA, MO BACA VALLEY TEL CO INC BCVY 2259 DES MOINES, NM BACKBONE COMMUNICATIONS INC BBCO 3795 LOS ANGELES, CA BADGER STATE TEL CO INC BDGS 0844 MADISON, WI BADGER TELECOM INC BDTC 0844 MADISON, WI BALDWIN NASHVILLE TEL CO INC BNNL 1107 BALDWIN, IA BALDWIN TELECOM INC BLDW 0846 BALDWIN, WI BALLARD RURAL TEL COOP CORP INC BLLR 0396 LA CENTER, KY BALPRI COMOMMUNICATIONS, INC. BLPR 2786 WASHINGTON, DC BALTIC TELECOM COOP BLTC 1642 BALTIC, SD BALTIMORE-WASHINGTON TELEPHONE BWTE 8697 LAUREL, MD BANFIELD TEL CO BNFD 0674 MI BARAGA TEL CO BARG 0675 BARAGA, MI BARNARDSVILLE TEL CO BDLV 0469 LEESBURG. AL, NC BARNES CITY COOP TEL CO BRCY 1108 BARNES CITY, IA BARRY COUNTY TEL CO BRYC 0676 DELTON, MI BASCOM MUTUAL TEL CO BSCM 0589 BASCOM, OH BAY SPRINGS TEL CO INC BYSP 0446 BAY SPRINGS, MS BAYLAND TEL INC BYLD 0925 ABRAMS, WI BBIS COMMUNICATIONS, INC. BBIS MARBLEHEAD, MA BEALLSVILLE TEL CO BEVL 0144 PA BEAR LAKE COMMUNICATIONS INC BLCI 3032 FAIRVIEW, UT BEAVER CREEK COOP TEL CO BVCK 2359 BEAVER CREEK, OR BEEHIVE TEL CO INC BHVE 2284 LAKE POINT, UT BEGGS TEL CO BGGS 1968 BEGGS, OK BEK COMMUNICATIONS COOPERATIVE BKCC 1604 STEELE, ND BELL ATLANTIC NETWORK DATA, INC. BAND NEW YORK, NY BELL CANADA BLCA MONTREAL,QUEBEC, ON BELL ONTARIO BONT 8051 TORONTO, ON BELL QUEBEC BQUE 8050 MONTREAL, PQ BELL WEST INC. (PREV BELL INTRIGNA INC) BLIN 2933 EDMONTON, AB

Proprietary — Licensed Material See proprietary restrictions on title page. 11–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location BELL-EAST COMPANY INC. (PREV PRE-TELL PRUI BAYSHORE, NY COMMUN) BELLSOUTH BSE INC BSEI 8394 ATLANTA, GA BELMONT TEL CO BLMT 0847 PLATTEVILLE, WI BEN LOMAND RURAL TEL COOP INC BNLM 0553 MCMINNVILLE, TN BENKELMAN TELEPHONE COMPANY, INC., DBA BNMN 2455 BENKELMAN, NE BWTELCOM BENTLEYVILLE TEL CO BNVL 0145 BENTLEYVILLE, PA BENTON COOP TEL CO BNTN 1356 RICE, MN BENTON RIDGE TEL CO BNRG 0590 BENTON RIDGE, OH BERESFORD MUNICIPAL TEL CO BRFR 1649 BERESFORD, SD BERGEN TEL CO BRGN 0848 SHARON, WI BERKSHIRE TEL CO BRKS 0073 KINDERHOOK, NY BERNARD TEL CO INC BNRD 1110 LOST NATION, IA BEST TELECOM LTD. BSTL 9249 ISLANDIA, NY BESTWEB CLEC, LTD. BWEB 5381 CROTON-ON-HUDSON, NY BETHEL & MT AETNA TEL & TEL CO BMAA 0146 PA BETTLES TEL CO BTLS 3002 BETTLES, AK BIDDEFORD INTERNET CORP. BIDD 9472 BIDDEFORD, ME BIG BEND TEL CO INC BGBN 2039 ALPINE, TX BIG RUN TEL CO BGRN 0147 PA BIG SANDY TELECOM INC BGSY 2192 SIMLA, CO BIJOU TEL COOP ASSN INC BJOU 2181 BYERS, CO BISON STATE TEL CO BSNS 1643 SD BISON TEL CO INC BISN KS BIXBY TEL CO INC BXBY 1969 BIXBY, OK BLACK EARTH TEL CO BERH 0849 MADISON, WI BLACKDUCK TEL CO BLKD 1357 BLACKDUCK, MN BLACKFOOT TEL COOP INC BLFT 2235 MISSOULA, MT BLAIR TEL CO BLAR 1524 BLAIR, NE BLANCA TEL CO BLNC 2182 ALAMOSA, CO BLANCHARD TEL ASSN INC BLND 0678 BLANCHARD, MI BLANSHARD MUN TEL SYS BMUN 8203 KIRKTON, ON B-LEC, INC. BLEC NEW HYDE PARK, NY BLEDSOE TEL COOP BLDS 0554 PIKEVILLE, TN BLOOMER TEL CO BLMR 0850 BLOOMER, WI BLOOMINGDALE HOME TEL CO INC BHME 0742 BLOOMINGDALE, IN BLOOMINGDALE TEL CO BLDL 0679 BLOOMINGDALE, MI BLOSSOM TEL CO BLSM 2038 BLOSSOM, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 11–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location BLOUNTSVILLE TEL CO INC BUVL 0282 BLOUNTSVILLE, AL BLUE EARTH VALLEY TEL CO BEVY 1358 BLUE EARTH, MN BLUE RIBBON RENTALS II, INC. BRRI 7719 CUY FALLS, OH BLUE RIDGE TEL CO BLRG 0346 BLUE RIDGE, GA BLUE VALLEY TEL CO INC BLVY 1746 HOME, KS BLUERIVER COMMUNICATIONS, INC. BLRC SALEM, IN BLUESTEM TELEPHONE COMPANY BSMT 1816 DODGE CITY, KS BLUFFDALE TEL CO BLFD 2042 TX BLUFFTON TEL CO INC BAPE 0512 BLUFFTON, SC BONDUEL TEL CO BNDL 0851 MADISON, WI BORDER TO BORDER COMMUNICATIONS BRBR 2073 KERRVILLE, TX BORG TELECOMMUNICATIONS INC BGTC TORONTO, ON BOSTON TELECOMMUNICATION SERVICES CORP BTSC LYNN, MA BOURBEUSE TEL CO BRBS 1859 SULLIVAN, MO BPS TELEPHONE CO. BPST 0463 MALDEN, MO BRAHMACOM, INC. BRAH 0035 BROOKLINE, MA BRANDENBURG TEL CO BRBG 0398 BRANDENBURG, KY BRANTLEY TEL CO INC BTLY 0347 NAHUNTA, GA BRAZORIA TEL CO BRZR 2040 BRAZORIA, TX BRAZOS TEL COOP INC BRZS 2041 OLNEY, TX BREDA TEL CORP BRED 1112 BREDA, IA BREEZEWOOD TEL CO BZWD 0149 BREEZEWOOD, PA BRETTON WOODS TEL CO BTWD 0038 BRETTON WOODS, NH BRICELYN MUTUAL TEL CO BRCL 1361 MN BRIDGE WATER TEL CO BRWR 1362 MONTICELLO, MN BRIDGECOM INTERNATIONAL, LLC BGMI 8359 MOUNT KISCO, NY BRIDGEWATER-CANISTOTA (INDEPENT BRWT 0158 HARTFORD, SD TELEPHONE COMPANY) BRINDLEE MOUNTAIN TEL CO BRMT 0283 ARAB, AL BRISTOL BAY TEL COOP INC BLBY 3003 KING SALMON, AK BRITISH COLUMBIA TEL CO BCTC 8086 BURNARY, BC BROADBAND COMMUNICATIONS, INC BRBC WINCHESTER, MA BROADBAND OFFICE COMMUNICATIONS, INC BOCI VIENNA, VA BROADRIVER COMM CO (PREV PUREPACKET PUPC ALPHARETTA, GA COMM, INC) BROADRIVER COMM OF THE NORTHEAST CORP PPNE ALPHARETTA, GA (PREV..) BROADRIVER COMM OF VA CORP (PREV PPVA ALPHARETTA, GA PUREPACKET - VA)

Proprietary — Licensed Material See proprietary restrictions on title page. 11–7 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location BROADRIVER COMMUNICATION CORP PUPS ALPHARETTA, GA (PUREPACKET - SOUTH) BROADSLATE NETWORKS INC (PREV CARDINAL BRSL CHARLOTTESVILLE, VA COMM, VA) BROADSTREET COMMUNICATIONS OF BSVA CANONSBURG, PA VIRGINIA,LLC BROADSTREET COMMUNICATIONS, INC. BRST CANONSBURG, PA BROMIDE TEL CO BRMD OK BROOKE COMMUNICATIONS, INC BRKC LONDON, KY BROOKE MUN TEL SYS BROK 8204 INWOOD, ON BROOKINGS LAKE TEL CO BLKE 1645 SD BROOKLYN MUTUAL TEL CO BRKL 1113 BROOKLYN, IA BROOKS FIBER COMMUNICATIONS BKFB 7219 GRAND RAPIDS, MI BROOKVILLE TEL CO BKVL 0150 EXPORT, PA BRUCE MUN TEL SYS BMPL 8205 KINCARDINE, ON BRUCE TEL CO INC BRCE 0855 BRUCE, WI BRUCE TEL CO INC BUCE 0447 BRUCE, MS BRYANT POND TEL CO BRPD 0002 BUCKFIELD, ME BUCKLAND MUTUAL TEL CO BCLD 0591 BUCKLAND, OH BUFFALO VALLEY TEL CO BFVY 0151 LEWISBURG, PA BUGGS ISLAND TEL COOP BUGI 0219 BRACEY, VA BULLOCH COUNTY RURAL TEL COOP INC BCRL 0348 STATESBORO, GA BURDETT TEL CO BRDT KS BURKE’S GARDEN TEL CO INC BRGR 0220 BURKE’S GARDEN, VA BURLINGTON BRIGHTON & WHEATLAND BBWD 0856 MADISON, WI BURT TEL CO BURT 1114 BURT, IA BUSH-TEL INC BUSH 3004 ANIAK, AK BUSINESS LONG DISTANCE, INC. BLDI 7734 READING, MA BUSINESS TECHNOLOGY SYSTEMS, INC. BTSI 8360 POMPANO BEACH, FL BUSINESS TELECOM INC BTIT 7794 RALEIGH, NC BUTLER TEL CO INC BTLR 0284 BAY SPRINGS, MS BUTLER-BREMER MUTUAL TEL CO BBRN 1115 PLAINFIELD, IA BYERS & PETROLIA TEL CO INC BPTA 2043 BYERS, TX C C & S TELCO INC CCST 0682 JACKSON, MI C2C FIBER OF MASSACHUSETTS, LLC. CCMA 3703 HOUSTON, TX CABLE & WIRELESS, INC. CWLI 6621 VIENNA, VA CABLEVISION LIGHTPATH, INC. CVLI HICKSVILLE, NY CABTEL COMMUNICATIONS, INC. CBTL SANDS POINT, NY CADDOAN TEL CO CDDN 0431 MONROE, LA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–8 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CALAVERAS TEL CO CLRS 2301 COPPEROPOLIS, CA CALHOUN CITY TEL CO INC CLHC 0448 CALHOUN CITY, MS CALIFORNIA PACIFIC UTILITIES CO CAPC 2304 CA CALIFORNIA-OREGON TEL CO CAOR 2311 DORRIS, CA CALLAWAY TEL EXCH CLWY 1365 DETROIT LAKES, MN CALL-NET TELECOMMUNICATIONS LTD CLNT WILLOWDALE, ON CAMBRIAN COMMUNICATIONS LLC CAMB FAIRFAX, VA CAMBRIDGE TEL CO CMBR 1526 CAMBRIDGE, NE CAMBRIDGE TEL CO CRDG 0983 GENESEO, IL CAMBRIDGE TEL CO INC CBRG 2215 CAMBRIDGE, ID CAMDEN TEL & TEL CO INC CAMN 0351 ST MARYS, GA CAMDEN TEL CO CMDN 0682 MI CAMDEN TEL CO INC CAMD 0744 CAMDEN, IN CAMERON TEL CO CMRN 0425 SULPHUR, LA CAMPTI-PLEASANT HILL TEL CO CIPH 0426 PLEASANT HILL, LA CANADIAN VALLEY TEL CO CNVY 1974 CROWDER, OK CANBY TEL ASSN CNBY 2362 CANBY, OR CANCALL COMMUNICATION, INC. CCAL 7071 NEWARK, NJ CANNON VALLEY TELECOM INC CNVT 1440 BRICELYN, MN CANTON TEL CO CNTN 0152 CANTON, PA CAP ROCK TEL CO INC CPRR 2046 SPUR, TX CAPAY VALLEY TEL SYSTEM INC CVLY 2306 GUINDA, CA CAPITAL REGION HEALTHCARE CORPORATION MDNT CONCORD, NH DBA MEDNET CAPITAL TELECOMMUNICATIONS, INC. CTLT 7706 YORK, PA CARBON/EMERY TELCOM, INC. CREM 1190 ORANGEVILLE, UT CARMEN TEL CO CRMN OK CARNEGIE TEL CO CARN 1976 CARNEGIE, OK CAROLINA TEL & TEL CO (UNITED SYM) CRLN 0470 TARBORO, NC CARONET, INC. CARO 8842 RALEIGH, NC CARR TEL CO CARR 0683 CARR, MI CARTER COUNTY TEL CO CRTR 1863 MO CASCADE TEL CO CSCD 1118 CASCADE, IA CASCADE UTILITIES INC CSDU 2371 ESTACADA, OR CASCO TEL CO CASC 0857 CASCO, WI CASEY MUTUAL TEL CO CASY 1119 CASEY, IA CASS COUNTY TEL CO CASS 0984 VIRGINIA, IL CASS COUNTY TELEPHONE COMPANY CASM 0472 PECULIAR, MO (MISSOURI)

Proprietary — Licensed Material See proprietary restrictions on title page. 11–9 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CASSADAGA TEL CORP CSDG 0076 FREDONIA, NY CASTLEBERRY TEL CO INC CSTL 0285 CASTLEBERRY, AL CAT COMMUNICATIONS INTERNATIONAL, INC. CATC CLOVERDALE, VA CAVALIER TELEPHONE, L.L.C. CVTL 4725 RICHMOND, VA CCL TELECOMMUNICATIONS, INC. CCLT 8991 CEDAR KNOLLS, NJ CCSI TELECOM, INC. CCSL 6165 BOHEMIA, NY CELLLAR RENTALS DBA NEW JERSEY CRNJ HARRISBURG, PA TELECONNECT CELLULAR RENTALS DBA PA TELECOM CRPA HARRISBURG, PA CEL-NET I COMMUNICATIONS, INC. CLNI 6173 FLUSHING, NY CENCOM OF WISCONSIN INC CMWI 0841 RUSHFORD, MN CENTER JUNCTION TEL CO CNJT 1121 CENTER JUNCTION, IA CENTERVILLE TEL CO CNVL 0154 PA CENTRAL ARKANSAS TEL COOP INC CEAR 1697 DONALDSON, AR CENTRAL INDIANA TEL CO INC CRIN 0747 BATTLE GROUND, IN CENTRAL LOUISIANA TEL CO INC CELA 0423 MONROE, LA CENTRAL MISSOURI TELECOMMUNICATIONS, CMOT OSAGE BEACH, MO INCORPORATED CENTRAL MONTANA COMMUNICATIONS INC CLMT 3310 HAVRE, MT CENTRAL NE TEL CO CENE 1528 NE CENTRAL OKLAHOMA TEL CO CEOK 1977 DAVENPORT, OK CENTRAL SCOTT TEL CSCT 1125 ELDRIDGE, IA CENTRAL STATE TEL CO CSTS 0859 MADISON, WI CENTRAL TEL CO CENT 0684 MARION, LA CENTRAL TEL CO CERL IL CENTRAL TEL CO CNTL IL CENTRAL TEL CO - NEVADA CTRL 2348 LAS VEGAS, NV CENTRAL TEL CO MIDSTATE CTMS 2113 TX CENTRAL TEL CO OF FLORIDA CEFL 0340 TALAHASSEE, FL CENTRAL TEL CO OF ILLINOIS CEIL 0985 DES PLAINES, IL CENTRAL TEL CO OF IOWA CETR 1127 FORT DODGE, IA CENTRAL TEL CO OF MINNESOTA CETL 1367 BURNSVILLE, MN CENTRAL TEL CO OF MISSOURI CEMO 1846 MO CENTRAL TEL CO OF NORTH CAROLINA CNTR 0471 HICKORY, NC CENTRAL TEL CO OF TEXAS CRTX 2114 KILLEEN, TX CENTRAL TEL CO OF VIRGINIA CEVA 0254 CHARLOTTESVILLE, VA CENTRAL TELEPHONE CO INC CETC MI CENTRAL TEXAS TEL COOP INC CETX 2052 GOLDTHWAITE, TX CENTRAL UTAH TEL INC CEUT 2277 FAIRVIEW, UT

Proprietary — Licensed Material See proprietary restrictions on title page. 11–10 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CENTURY TEL CO OF OHIO CEOH 0630 MONROE, LA CENTURY TEL MIDWEST INC CTMW 0671 MONROE, LA CENTURY TEL OF IDAHO INC CTIH 2225 MARION, LA CENTURY TEL OF MICHIGAN INC CNMI 0702 MARION, LA CENTURY TEL OF TEXAS INC CYTX 2036 TX CENTURY TEL OF WISCONSIN INC CYWI 0895 LACROSSE, WI CENTURY TELEPHONE ENTERPRISES CNTY 0440 MONROE, LA CENTURY TELEPHONE OF ARKANSAS CTAR 1706 HARDY, AR CENTURY TELEPHONE OF NORTH LA INC CYNL 0436 MONROE, LA CENTURYTEL OF CENTRAL ARKANSAS, LLC. CTCA 1144 JACKSONVILLE, AR CENTURYTEL OF CENTRAL WISCONSIN, LLC. CTCW 1159 LA CROSSE, WI CENTURYTEL OF NORTHWEST ARKANSAS, LLC CTNA 1142 RUSSELLVILLE, AR CFW NETWORK CO. CFWN WAYNESBORO, VA CHAMPAIGN TEL CO CHMP 0594 URBANA, OH CHAMPLAIN TEL CO CPLN 0077 CHAMPLAIN, NY CHAMPLAIN VALLEY TELECOM INC CVTI 3330 WAITSFIELD, VT CHANDLERVILLE TEL CO CAVL 0986 VIRGINIA, IL CHARITON VALLEY TEL CO CRTV 1864 BUCKLIN, MO CHATHAM TEL CO CHAT 0427 CHATHAM, LA CHATHAM TEL CO CHHM 0685 CHATHAM, MI CHAUTAUQUA & ERIE TEL CORP CERE 0078 WESTFIELD, NY CHAZY & WESTPORT TEL CORP CWTT 0079 WESTPORT, NY CHENANGO & UNADILLA TEL CO CUDL 0080 NY CHEQUAMEGON TEL COOP INC CQMN 0860 CABLE, WI CHEROKEE TEL CO CHRK 1979 CALERA, OK CHESAPEAKE TELECOMMUNICATIONS CHSP WARSAW, VA CORPORATION CHESNEE TEL CO CHSN 0515 CHESNEE, SC CHESTER TEL CO CHES 1126 CHESTER, IA CHESTER TEL CO CHST 0516 CHESTER, SC CHEYENNE RIVER SIOUX TRIBAL TEL AUTH CRST 1647 EAGLE BUTTE, SD CHIBARDUN TEL COOP INC CBRN 0861 DALLAS, WI CHICHESTER TEL CO CHCH 0040 CHICHESTER, NH CHICKAMAUGA TEL CORP CHCM 0354 BAY SPRINGS, MS CHICKASAW TEL CO CHCS 1980 SULPHUR, OK CHILITECH INTERNET SOLUTIONS, INC. CHIL WILLIAMSPORT, PA CHILLICOTHE TEL CO CHLC 0597 CHILLICOTHE, OH CHINA TEL CO CHIN 0004 SOUTH CHINA, ME

Proprietary — Licensed Material See proprietary restrictions on title page. 11–11 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CHIPPEWA COUNTY TEL CO CPPW 0680 BRIMLEY, MI CHOCTAW TEL CO CHCT 1893 HALLTOWN, MO CHOCTAW TELECOMMUNICATIONS, LLC. CHTL 7668 HOUSTON, TX CHOICE ONE COMMUNICATIONS CHOC ROCHESTER, NY CHOUTEAU TEL CO CHOT 1981 CHOUTEAU, OK CHR TELECOMMUNICATIONS CHRT 9697 WOODSIDE, NY CHRISPS TEL CO CRPS 1530 NE CHUGWATER TEL CO CHGW 2289 CHUGWATER, WY CHURCHILL COUNTY TELEPHONE CHHL 2349 FALLON, NV CI2, INC CIIC 2690 ATLANTA, GA CIERA NETWORK SYSTEMS, INC. CNSI HOUSTON, TX CIMARRON TEL CO CIMR 1982 MANNFORD, OK CINCINNATI BELL TELEPHONE COMPANY CB CINCINNATI, OH CIRCLE UTILITIES CULS 3005 CIRCLE, AK CITIWISE COMMUNICATIONS, L.L.C. CWCL 5958 SOUTH ORANGE, NJ CITIZENS COMMUNICATIONS CZUC DALLAS, TX CITIZENS COMMUNICATIONS (PREV CITIZENS CTIN 3400 TX TEL CO) CITIZENS MUTUAL TEL CO CINS 1129 BLOOMFIELD, IA CITIZENS TEL CO CTES 1865 HIGGINSVILLE, MO CITIZENS TEL CO CZEN 0473 BREVARD, NC CITIZENS TEL CO IN GA CTZZ 0355 LESLIE, GA CITIZENS TEL CO INC CTZE 0750 FAIRMOUNT, IN CITIZENS TEL CO OF HAMMOND NY INC CZNS 0081 HAMMOND, NY CITIZENS TEL CO OF KECKSBURG CKSG 0156 MAMMOTH, PA CITIZENS TEL COOP CITZ 0225 FLOYD, VA CITIZENS TEL COOP INC CXZX 0863 NEW AUBURN, WI CITIZENS TEL CORP CTIZ 0751 WARREN, IN CITIZENS UTILITIES CO OF PA CUPA 0157 NEW BETHLEHEM, PA CITY OF BARNESVILLE TEL UTIL CBNL 1353 BARNESVILLE, MN CITY OF BROOKINGS MUNI TEL DEPT CBML 1650 BROOKINGS, SD CITY OF FAITH MUNICIPAL TEL CO COFH 1653 FAITH, SD CITY OF LAKELAND ELECTRIC & WATER CLEW 8551 LAKELAND, FL CITYNET TELECOM, INC. CYTI SILVER SPRINGS, MD CLAIBORNE TEL CO CLBN 0557 MONROE, LA CLARA CITY TEL EXCH CO CLCY 1370 CLARA CITY, MN CLARENCE TEL CO INC CLNC 1130 CLARENCE, IA CLARICOM NETWORKS INC CRNW 7906 MILFORD, CT

Proprietary — Licensed Material See proprietary restrictions on title page. 11–12 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CLARK FORK TELECOMMUNICATIONS CLFK 3308 MISSOULA, MT CLARKS TEL CO CLRK 1531 CLARKS, NE CLARKSVILLE MUTUAL TEL CO CLVL 0990 MARSHALL, IL CLARKSVILLE TELEPHONE COMPANY CKVT 1120 PLAINFIELD, IA CLASSIC TELEPHONE CLST 1819 WAKEENEY, KS CLAY COUNTY RURAL TEL COOP INC CCRL 0753 CLOVERDALE, IN CLAYTON TEL CO CYTN 0687 AUGUSTA, MI CLEAR CREEK MUTUAL TEL CO CLCK 2363 OREGON CITY, OR CLEAR LAKE INDEPENDENT TEL CO CLIT 1132 CLEAR LAKE, IA CLEAR LAKE TEL CO INC CLLK 0865 CLEAR LAKE, WI CLEARFIELD & CAMBRIA TEL CO CCMR 0158 PA CLEC COMMUNICATIONS, CORP. CLEC 2523 PEARL RIVER, NY CLEMENTS TEL CO CLEM 1372 REDWOOD FALLS, MN CLEVELAND COUNTY TEL CO INC CVLD 1698 RISON, AR CLICK NETWORK CKNW TACOMA, WA CLIFTON FORGE WAYNESBORO TEL CO CFWO 0226 STAUNTON, VA CLIFTON TEL CO CFTN 2054 TX CLIMAX TEL CO CLMX 0688 CLIMAX, MI CLOSECALL AMERICA, INC CCAM 3346 CHESTER, MD CLYMER TEL CO INC CLYM 0082 NORTH SYRACUSE, NY C-M-L TEL COOP ASSN OF MERIDEN IOWA CMLC 1133 MERIDEN, IA CO SPACE SERVICES, LLC COSS SOMERVILLE, MA COASTAL TEL & ELEC CORP CSTE 0424 MONROE, LA COASTAL TEL CO COSL 0424 LA COASTAL UTILITIES INC CUTS 0356 HINESVILLE, GA COAXICOM, INC. CXCM 7596 NEW YORK, NY COBBOSSEECONTEE TEL CO CBST 0005 WEST GARDINER, ME COCHRANE COOP TEL CO CCHR 0866 COCHRANE, WI COCHRANE MUN TEL SYS CHRN 8206 COCHRANE, ON CODETEL, C POR A VZDR MIAMI, FL COKEVILLE TEL CO INC CKVL 2290 UT COLDWATER MUN TEL SYS CDWR 8207 COLDWATER, ON COLEMAN COUNTY TEL COOP INC CNCY 2057 SANTA ANNA, TX COLO TEL CO COLO 1134 COLO, IA COLORADO VALLEY TEL COOP INC COVY 2059 LA GRANGE, TX COLTON TEL CO COLT 2364 COLTON, OR COLUMBIA TEL CO CLMA OR COLUMBIA TELECOMMUNICATIONS, INC. CLBL BATON ROUGE, LA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–13 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location COLUMBINE TEL CO COLB 2204 FREEDOM, WY COLUMBUS GROVE TEL CO CMGV 0604 COLUMBUS GROVE, OH COLUMBUS TEL CO CLBS 1756 COLUMBUS, KS COMANCHE COUNTY TEL CO INC CMNC 2060 DE LEON, TX COMAV CORPORATION CMAV 7031 FRAMINGHAM, MA COMCAST TELEPHONY COMMUNICATIONS OF CTMD 2477 PHILADELPHIA, PA MARYLAND, INC. COMMITTED TELEPHONE SERVICES CDTS EAST ORANGE, NJ COMMONWEALTH TEL CO CMWL 0161 DALLAS, PA COMMONWEALTH TELECOM SERVICES INC CWTS 7513 WILKES-BARRE, PA COMMSOUTH COMPANIES, INC. CSCI 7450 ARLINGTON, TX COMMUNICATION CORP OF MICHIGAN CCMI 0672 AUGUSTA, MI COMMUNICATION CORP OF SOUTHERN INDIANA CCSI 0809 POSEYVILLE, IN COMMUNICATIONS CONTROL CORPORATION CMCO 7791 BROOKLYN, NY COMMUNICATIONS CORP OF INDIANA CSIN 0776 ROACHDALE, IN COMMUNICATIONS IMAGE TECHNOLOGIES, INC CMIM DUNN LORING, VA COMMUNICATIONS INC CCNS 6172 CAMDEN, NJ COMMUNICATIONS PLUS, INC. CMPL 4601 MORGANTOWN, WV COMMUNITY INTERNET SYSTEMS, INC. CISI COLUMBUS, NE COMMUNITY NETORKS, INC. CMNI LONG ISLAND CITY, NY COMMUNITY NETWORK SERVICES, INC. CMNK 7633 NEW YORK, NY COMMUNITY SERVICE TEL CO CSVC 0015 WINTHROP, ME COMMUNITY TEL CO CMNY 2061 WINDTHORST, TX COMPLETE BUSINESS SYSTEMS, INC. COBS TYNGSBORO, MA COMSCAPE TELECOMMUNICATIONS, INC. CSPE 4903 WEST PALM BEACH, FL CONCORD TEL CO CNCR 0474 CONCORD, NC CONCORD TEL CO INC CCRD 0690 MI CONCORD TEL EXCH INC CNCD 0559 KNOXVILLE, TN CONECTIV COMMUNICATIONS, INC CNVC 7967 NEWARK, DE CONESTOGA ENTERPRISES , INC CNTG 0162 BIRDSBORO, PA CONNEAUT TEL CO CNNT 0606 CONNEAUT, OH CONNECT COMMUNICATIONS CORP DBA TOTAL CCTC 4159 LITTLE ROCK, AR CONNECT CONNECT COMMUNICATIONS CORPORATION CHCP 4158 LITTLE ROCK, AR DBA CONNECT CONNECT.COM CNCM LITTLE ROCK, AR CONROE TEL CO CONR 2062 TX CONSOLIDATED EDISON COMMUNICATIONS, CECI NEW YORK, NY INC.

Proprietary — Licensed Material See proprietary restrictions on title page. 11–14 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CONSOLIDATED TEL CO CSLD 1532 LINCOLN, NE CONSOLIDATED TEL CO CSLT 1373 BRAINERD, MN CONSOLIDATED TEL COOP CNSL 1607 DICKINSON, ND CONSOLIDATED TELCO INC CLSD 1530 LINCOLN, NE CONTEL OF ARKANSAS INC DBA GTE AR CLAR 1730 RUSSELLVILLE, AR CONTEL OF CALIFORNIA CLCA 2302 VICTORVILLE, CA CONTEL OF ILLINOIS DBA GTE IL CLIL 1036 SYCAMORE, IL CONTEL OF INDIANA INC DBA GTE INDIANA CLIN 0779 SEYMOUR, IN CONTEL OF IOWA DBA GTE IL CLIA 1207 MENDOTTA HTS, MN CONTEL OF KANSAS DBA GTE OF AR-IA CSIA 1135 OVERLAND PARK, KS CONTEL OF KANSAS DBA GTE SYS OF AR-AR CSAR 1700 OVERLAND PARK, KS CONTEL OF KANSAS INC DBA GTE SYS OF AR CLKS 1790 GARDNER, KS CONTEL OF KENTUCKY INC DBA GTE KY CLKY 0410 HERSHEY, PA CONTEL OF MAINE INC DBA GTE OF MAINE CLME 0014 DAMARISCOTTA, ME CONTEL OF MINNESOTA INC DBA GTE MN CLMN 1140 MENDOTTA HEIGHTS, MN CONTEL OF MISSOURI INC DBA GTE MO CLMO 1922 WENTZVILLE, MO CONTEL OF NEW HAMPSHIRE DBA GTE NH CLNH 0041 HILLSBORO, NH CONTEL OF NORTH CAROLINA INC DBA GTE NC CTNC 0509 WEAVERVILLE, NC CONTEL OF NORTH DAKOTA DBA GTE ND GTND 1447 ST. PAUL, MN CONTEL OF NORTH DAKOTA INC CLND 1447 ST LOUIS, MO CONTEL OF PENNSYLVANIA INC DBA GTE PA CLPA 0170 HERSHEY, PA CONTEL OF SC INC DBA GTE SC CLSC 0526 SIMPSONVILLE, SC CONTEL OF SOUTH DAKOTA INC CLSK 1643 ST PAUL, MN, SD CONTEL OF SOUTH DAKOTA INC DBA GTE SD GTSD 1643 ST. PAUL, MN CONTEL OF TEXAS INC DBA GTE TX CLTX 2154 DALLAS, TX CONTEL OF THE SOUTH DBA GTE SOUTH CLSO 0281 THOMASTON, GA CONTEL OF VERMONT INC DBA GTE VT CLVT 0070 SPRINGFIELD, VT CONTEL OF VIRGINIA INC DBA GTE VA CLVA 0233 MECHANICSVILLE, VA CONTEL SYSTEMS OF MO DBA GTE SYS OF MO CSMO 1846 WENTZVILLE, MO CONTINENTAL TEL CO- MID-SOUTH DIV CLMS 0410 KY CONTINENTAL TEL CO OF MICHIGAN CLMI 0702 MI CONTINENTAL TEL CO OF NEBRASKA CLNE 1740 NE CONTINENTAL TEL CO OF OHIO CTNL 0607 CONTINENTAL, OH CONTINENTAL TEL CO OF OKLAHOMA CLOK OK CONTINENTAL TEL CO OF THE NORTHWEST CLNW 2449 BELLEVUE, WA CONTINENTAL TELECOM INC (CONTEL) CLTM ATLANTA, GA CONTOOCOOK VALLEY TELEPHONE CTVT 3320 CONTOOCOOK, NH CONVERGENCE, INC CNGI TAMPA, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 11–15 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CONVERGENT COMMUNICATIONS SERVICES CVCS ENGLEWOOD, CO CONVERGENT TELESIS LLC CTSL SOUTHAMPTON, NY CONVERSENT COMM. LLC(PREV NEW ENGLAND NVAL 4051 PROVIDENCE, RI VOICE DATA) COON CREEK TEL CO CNCK 1136 BLAIRSTOWN, IA COON VALLEY COOP TEL ASSN INC COVL 1137 MENLO, IA COON VALLEY FARMERS TEL CO CVFS 0868 COON VALLEY, WI COOPERATIVE COMMUNICATIONS INC CPCI 8407 BELLEVILLE, NJ COOPERATIVE TEL CO CPTV 1139 VICTOR, IA COOPERATIVE TEL EXCH CPRV 1303 STANHOPE, IA COOPERSBURG TEL CO CPBG 0163 COOPERSBURG, PA COPPER VALLEY TEL COOP INC CPVY 3006 VALDEZ, AK COPPER VALLEY TELEPHONE, INC. CLCC 3333 WILLCOX, AZ CORDIA COMMUNICATIONS CORP CORD NORWALK, CT CORDOVA TEL COOP INC CAPU 3007 CORDOVA, AK CORE COMMUNICATIONS, INC. CORE WASHINGTON, DC CORECOMM NEWCO, INC DBA CORECOMM (PREV UNTM 7484 WORTHINGTON, OH USN COMMUN) CORN BELT TEL CO CNBT 1141 WALL LAKE, IA CORONA TEL CO CORN 2261 NM COSERV, LLC CSRV 8316 LEWISVILLE, TX COUNCIL GROVE TEL CO CNGV 1758 COUNCIL GROVE, KS COUNCIL TELEPHONE COMPANY, INC. CTPC 0103 CAMBRIDGE, ID COURCELLES INC LA CIE DE TEL DE CRCL 8208 COURCELLES, PQ COVAD COMMUNICATIONS COMPANY COVD 7871 SANTA CLARA, CA COVISTA OF NEW YORK, INC. CONY 2457 LITTLE FALLS, NJ COVISTA OF VIRGINIA, INC. CVVA LITTLE FALLS, NJ COVISTA, INC (PREV TOTALTEL, INC.) TTLT 7700 LITTLE FALLS, NJ COWICHE TEL CO INC CWCH 2410 COWICHE, WA COXCOM, INC COXC 7987 ATLANTA, GA COZAD TEL CO COZD 1534 COZAD, NE CP-TEL NETWORK SERVICES, INC. CPTN NATCHITOCHES, LA C-R TEL CO CRTC 1009 RANSOM, IL CRAIG TEL CO CRAG 1535 NE CRAIGVILLE TEL CO INC CRVI 0756 CRAIGVILLE, IN CRANDON TEL CO CRDN 0870 RHINELANDER, WI CRAW-KAN TEL COOP INC CWKS 1759 GIRARD, KS CRC COMMUNICATIONS OF CALIFORNIA, INC. CRCA TURLOCK, CA CRC COMMUNICATIONS OF MAINE, INC. CRCC 1255 GRAY, ME

Proprietary — Licensed Material See proprietary restrictions on title page. 11–16 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location CRESWELL TEL CO CRWL OR CRG INTERNATIONAL DBA NETWORK ONE CINO 7208 ATLANTA, GA CROCKETT TEL CO INC CRCT 0561 FRIENDSHIP, TN CROSS TEL CO CRSS 1985 WARNER, OK CROSSLAKE TEL CO CSLK 1499 CROSSLAKE, MN CROSSVILLE TEL CO CSVL 0993 CROSSVILLE, IL CROWN POINT TEL CORP CRPN 0085 CROWN POINT, NY CRYSTAL COMMUNICATIONS CORP. CMCC WESTBORO, MA CSTC, LLC CSTC RENSSELAER, NY CSW/ICG CHOICE COM, L.P. SHOC 7087 AUSTIN, TX CT COMMUNICATIONS NETWORK, INC. CTNW 5632 URBANA, OH CT COMMUNICATIONS, INC CTCN CONCORD, NC CTC COMMUNICATIONS CORP. CTCM 7759 WALTHAM, MA CUBA CITY TEL EXCH CO INC CBCY 0872 PLATTEVILLE, WI CUBE COMPUTER CORPORATION CUBE 2861 HAWTHORNE, NY CUMBERLAND TEL CO CBRD 1146 CUMBERLAND, IA CUMBY TEL COOP INC CMBY 2065 CUMBY, TX CUNNINGHAM TEL CO INC CNHM 1761 GLEN ELDER, KS CURRY COMMUNICATIONS, INC CURY EAST PITTSBURGH, PA CURTIS TEL CO CRTS 1536 CURTIS, NE CUSTER TEL COOP INC CSTR 2218 CHALLIS, ID CUTTER COMMUNICATIONS, INC DBA GCEC GCEC VAN ALSTYNE, TX TECHNOLOGIES CYBERNET COMMUNICATIONS, INC. CYNC 4241 SANTA MONICA, CA CYPRESS TELECOMMUNICATIONS CYPS 8851 HOUSTON, TX CORPORATION CYRIS, LLC CYRS 5729 VIRGINIA BEACH, VA D & E SYSTEMS, INC. DESI 4114 EPHRATA, PA DAAQUAM INC TEL DAQM 8209 DAAQUAM, PQ DAKOTA CENTRAL RURAL TEL COOP DCRL 1610 CARRINGTON, ND DAKOTA COOP TELECOM CO INC DAKT 1652 IRENE, SD DAKOTA TELECOMMUNICATIONS SYSTEMS, INC. DKTS IRENE, SD DAKTEL COMMUNICATIONS, LLC. DAKC 1799 CARRINGTON, ND DALTON TEL CO DLTN 1537 DALTON, NE DANUBE TEL CO DANB 1377 DANUBE, MN DANVILLE MUTUAL TEL CO DAVL 1147 DANVILLE, IA DARIEN TEL CO INC DARN 0358 DARIEN, GA DARK AIR CORPORATION DAIR WOBURN, MA DAVIESS-MARTIN COUNTY RURAL TEL CORP DMRL 0759 MONTGOMERY, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–17 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location DECATUR TEL CO DTUR 1699 DECATUR, AR DECATUR TEL CO INC DCTR 0451 DECATUR, MS DEEP RIVER MUTUAL TEL CO DPRV 1148 DEEP RIVER, IA DEER RIVER TEL CO INC DRRV 1379 DEER RIVER, MN DEERFIELD FARMERS TEL CO DRFL 0691 PETERSBURG, MI DEERFIELD TEL CO DRFD 0229 VA DEFIANCE TEL CO DFNC 1149 DEFIANCE, IA DEKALB TEL COOP DKAL 0562 ALEXANDRIA, TN DELAVAN TEL CO DLVN 1380 DELAVAN, MN DELAWARE TEL CO INC DLWR 0087 NY DELAWARE VALLEY TEL CO DEVY 0086 NY DELCAMBRE TEL CO DLCM 0428 DELCAMBRE, LA DELHI TEL CO DELH 0088 DELHI, NY DELL TEL COOP INC DELL 2066 DELL CITY, TX DELTA COMMUNICATION DTLA NEWARK, NJ DELTA COUNTY TELE-COMM INC DELT 2184 PAONIA, CO DELTA TEL CO INC DLTA 0452 LOUISE, MS DENVER & EPHRATA TEL & TEL CO DERT 0165 EPHRATA, PA DEPOSIT TEL CO INC DPST 0089 DEPOSIT, NY DEPUE TEL CO DEPU 0998 DEPUE, IL DEUEL TEL COOP ASSN DUEL 1654 MN DFT LOCAL SERVICE CORPORATION DFTC FREDONIA, NY DIALALOT.COM, INC. DLOT WHITEHOUSE STATION, NJ DIALOG SMALL BUSINESS ALLIANCE, INC. DSBI CHARLOTTE, NC DIAMOND COMMUNICATIONS INTERNATIONAL, DMCI 7027 DALLAS, TX INC. DICKEY RURAL TEL COOP DRMA 1611 ELLENDALE, ND DICKEYVILLE TEL CO DCVL 0875 PLATTEVILLE, WI DIGATEL COMMUNICATION SYSTEMS, LLC DCSL MAPLEWOOD, NJ DIGICOMMUNICATIONS LTD. DIGI NEW YORK, NY DIGITAL BROADBAND COMMUNICATIONS DBCI 4952 WINCHESTER, MA DIGITAL CONNECTIONS, INC. DGCN MORGANTOWN, WV DIGITAL SIGNAL COMMUNICATIONS, INC. DGSC 8535 LACONIA, NH DILLER TEL CO DLLR 1540 DILLER, NE DIXON TEL CO DIXN 1150 DIXON, IA DIXVILLE TEL CO DXVL 0042 DIXVILLE NOTCH, NH DMI COMMUNICATIONS GROUP, INC. DMCG FORT LEE, NJ DMJ COMMUNICATIONS, INC. DMJC 7654 OCLESSA, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 11–18 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location DOBSON TEL CO DBSN 1988 CHEYENNE, OK DODGE COUNTY TEL CO DODG 0876 MADISON, WI DOMINION GROUP LTD DOGG ISLANDIA, NY DOMINION TELECOM, INC. DMNT 1040 RICHMOND, VA DONIPHAN TEL CO DNPH 1871 MO DORRIS TEL CO DRRS 2311 OR DOYLESTOWN TEL CO DYTW 0609 DOYLESTOWN, OH DPI TELECONNECT, LLC DPIT 4728 DALLAS, TX DRENTHE TEL CO DRNT 0692 ZEELAND, MI DRUMMOND ISLAND TEL CO DRMD 0693 MI DRYDEN MUN TEL SYS DRYD 8210 DRYDEN, ON DSCI CORPORATION DSCI BOLTON, MA DSLNET COMMUNICATIONS, LLC DSEC NORWALK, CT D-TEL INC DEDD ISLANDIA, NY D-TEL LLC DTEL 0987 WILMINGTON, DE DUBOIS TEL EXCH INC DUBS 2291 DUBOIS, WY DUCOR TEL CO DUCR 2313 DUCOR, CA DUMMY-DUMMY DUMY ---- HOLD DISC CODES, DUMONT TEL CO DUMT 1152 DUMONT, IA DUNBARTON TEL CO DNTN 0043 DUNBARTON, NH DUNKERTON MUTUAL TEL CO DMAL 1153 IA DUNKERTON TEL COOP DKTN 1153 DUNKERTON, IA DUNKIRK & FREDONIA TEL CO DFDN 0091 FREDONIA, NY DUNNELL TEL CO DNNL 1381 DUNNELL, MN DUO COUNTY TEL COOP INC DUOC 0401 JAMESTOWN, KY DURHAM TEL LTD DRHM 8211 MILLBROOK, ON E. RITTER TEL CO ERTR 1722 MARKED TREE, AR E.N.M.R. TEL COOP INC ENMR 2262 CLOVIS, NM E.SPIRE COMMUNICATIONS, INC. ESPC 7280 ANNAPOLIS JUNCTION, MD EAGLE COMMUNICATIONS, INC EGLC 4274 NEW YORK CITY, NY EAGLE TEL SYSTEM INC EAGL 2369 RICHLAND, OR EAGLE TELECOMMUNICATIONS INC EGVL 2185 EAGLE, CO EAGLE VALLEY TEL CO EGVY 1383 HECTOR, MN EARLING MUTUAL TEL CO ERNG 1154 IA EAST ASCENSION TEL CO EASN 0429 GONZALES, LA EAST BUCHANAN TEL COOP EBCN 1156 WINTHROP, IA EAST COAST COMMUNICATIONS ETCC 6149 RICHMOND, VA EAST OTTER TAIL TEL CO EORT 1385 PERHAM, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–19 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location EAST PLAINS TELECOM, INC. EPTI BALTIC, SD EAST RIVER TELECOMMUNICATIONS CORP ERTC 3053 NEW ROCHELLE, NY EASTCOAST TELECOM INC ECST 0914 MADISON, WI EASTERN MISSOURI TEL CO EAMI 1873 BOWLING GREEN, MO EASTERN NEBRASKA TEL CO EANE 1542 BLAIR, NE EASTERN OREGON TEL CO EAOR 2370 OR EASTERN SLOPE RURAL TEL ASSN INC ESRL 2186 HUGO, CO EASTERN TEL. SYSTEMS INC DBA EASTERN TEL ETLD 4539 FOR WASHINGTON, PA LONG DIST EASTERN TELEPHONE, INC. ESTT 2568 BOSTON, MA EASTEX TEL COOP INC ESTX 2068 HENDERSON, TX EASTON TEL CO ESTN 1384 BLUE EARTH, MN EASY PHONE, INC EYPH 8671 SEA CLIFF, NY ECKLES TEL CO EKLS 1386 NEW PRAGUE, MN ECON-O-CALL, INC DBA UNCLE SAM’S TELCOM, EUST NEW YORK, NY INC. ECONOPHONE SERVICES INC ECPS PARAMUS, NJ EDEN VALLEY TEL CO EDVY 2292 FARSON, WY EDGE CONNECTIONS, INC. EDCN ATLANTA, GA EDMONTON TELEPHONES EDTN 8081 EDMONTON, AB EDWARDS TEL CO INC EDWR 0092 EDWARDS, NY EGYPTIAN TEL COOP ASSN EGPN 1003 STEELEVILLE, IL EL FENIX TELEPHONE CORP EFXC 9149 CLIFFSIDE PARK, NJ EL PASO COUNTY MUTUAL TEL CO EPCY 2187 COLORADO SPRINGS, CO EL PASO NETWORKS, L.L.C. ELPN 5704 HOUSTON, TX EL PASO TEL CO ELPS 1004 EL PASO, IL ELBERFELD TEL CO INC ELBR 0795 IN ELECTRA TEL CO INC ELCT 2069 ELECTRA, TX ELECTRIC POWER BOARD OF CHATTANOOGA EPBC CHATTANOOGA, TN ELIZABETH ISLANDS TEL CO EISL WOODS HOLE, MA ELIZABETH TEL CO ELZB 0430 SULPHUR, LA ELKHART TEL CO INC EKHT 1764 ELKHART, KS ELLENSBURG TEL CO ELBG 2412 ELLENSBURG, WA ELLERBE TEL CO INC ELRB 0478 ELLERBE, NC ELLIJAY TEL CO ELJY 0360 ELLIJAY, GA ELLINGTON TEL CO ELTN 1874 ELLINGTON, MO ELLSWORTH COOP TEL ASSN ELWO 1157 ELLSWORTH, IA ELMORE CITY TEL CO ELMR OK ELMORE-COOSA TEL CO INC ECSA 0289 ELMORE, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 11–20 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location ELNORA TEL CO INC ELNR 0762 ROACHDALE, IN ELSIE MUTUAL TEL CO ELSI 1544 ELSIE, NE ELYRIA TEL CO ELYR 0611 ELYRIA, OH EMERY TELEPHONE EMRY 2278 ORANGEVILLE, UT EMILY COOP TEL CO EMLY 1387 EMILY, MN EMPIRE COMMUNICATIONS INC EPRC 4002 CHARLOTTE, NC EMPIRE ONE TELECOMMUNICATIONS, INC. EOTM 7713 NEW YORK, NY EMPIRE TEL CO EMPE 0361 GA EMPIRE TEL CORP EMPR 0093 PRATTSBURG, NY ENERGY EAST TELECOMMUNICATIONS, INC. EETI BINGHAMTON, NY ENERGY RESEARCH GROUP DBA NORTHEAST NETS 7799 NEWTON, PA TEL SERVICES ENGLEWOOD TEL CO ENWD 0563 TN ENHANCED SERVICE PROVIDERS, LLC ESPL 4049 HANOVER, MA ENON VALLEY TEL CO ENON 0167 PA ENTERPRISE TEL CO ENTR 0168 NEW HOLLAND, PA EQUAL ACCESS NETWORKS,LLC. EANL WOBURN, MA EQUALITY TEL CO INC EQLT 1006 IL ERNEST COMMUNICATIONS, INC ERCM 4148 NORCROSS, GA ESSEX COMMUNICATIONS, INC. ESCM 8524 MERRICK, NY ETEX TEL COOP INC ETEX 2070 GILMER, TX EUSTIS TEL EXCH INC ESTS 1545 BRADY, NE EVANGELINE TEL CO EVLN 0434 MONROE, LA EVANS TEL CO EVNS 2315 TURLOCK, CA EVEREST BROADBAND NETWORKS, INC. EBNI FORT LEE, NJ EVOICE TELECOM, INC. EVTI MENLO PARK, CA EVULKAN, INC. EKAN NEW YORK, NY EXARIO TELECOM, INC. EXTI PARSIPPANY, NJ EXCEL TELECOMMUNICATIONS, INC. EXCL 2897 DALLAS, TX EXELON COMMUNICATIONS COMPANY, L.L.C. EXCC 9010 BALA CYNWYD, PA EXPRIMER COMMUNICATIONS, INC. EXPC BROOKLYN, NY EXTENSION TEL ASSN EXTN 1546 NE EZ PHONE, INC. EZPI AKRON, OH EZ TALK COMMUNICATIONS, LLC EZTO 7667 STAFFORD, TX EZ TEL CORP DBA MASSACHUSETTS WHOLESALE EZTC 8323 BOSTON, MA TELEPHONE EZ-TEL COMMUNICATIONS EZTL JACKSONVILLE, FL F & M TEL CO FMTC 1876 MO

Proprietary — Licensed Material See proprietary restrictions on title page. 11–21 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location F. TURNER CORPORATIN, INC. DBA TCS OF NEW FTNJ ORANGE, NJ JERSEY FACILICOM INTERNATIONAL, LLC FCIN 7965 WASHINGTON, DC FAIRBANK MUNICIPAL UTILITIES SYSTEM FRBN 3008 FAIRBANKS, AK FAIRMOUNT TEL CO INC FAMT 0362 FAIRMOUNT, GA FAIRPOINT COMMUNICATIONS CORP (PREV MJD MJDT 8931 CHATHAM, NY TELECHOICE FAIRWATER-BRANDON-ALTO TEL CO FBAO 0877 BRANDON, WI FARBER TEL CO FARB 1876 FARBER, MO FARMERS & BUSINESSMEN’S TEL CO FBMS 1160 WHEATLAND, IA FARMERS & MERCHANTS MUTUAL TEL CO FMML 1166 WAYLAND, IA FARMERS COOP TEL CO FMCO 1162 DYSART, IA FARMERS INDEPENDENT TEL CO FRMI 0879 GRANTSBURG, WI FARMERS MUTUAL COOP TEL CO FARM 1168 HARLAN, IA FARMERS MUTUAL COOP TEL CO FRMM 1169 MOULTON, IA FARMERS MUTUAL TEL CO FAAR 1172 NORA SPRINGS, IA FARMERS MUTUAL TEL CO FAER 1171 JESUP, IA FARMERS MUTUAL TEL CO FARE 1174 STANTON, IA FARMERS MUTUAL TEL CO FARS 1173 SHELLSBURG, IA FARMERS MUTUAL TEL CO FMER 1389 BELLINGHAM, MN FARMERS MUTUAL TEL CO FMLY 2221 FRUITLAND, ID FARMERS MUTUAL TEL CO FRMR 0612 NEPOLEON, OH FARMERS MUTUAL TEL CO OF CHAPIN FMCN 0694 MI FARMERS MUTUAL-CHAPIN DBA CHAPIN TEL CO CHPT 0694 ELSIE, MI FARMERS TEL CO FERS 1176 ESSEX, IA FARMERS TEL CO FMES 1175 BATAVIA, IA FARMERS TEL CO FRMS 0880 LANCASTER, WI FARMERS TEL CO FTEL 1177 RICEVILLE, IA FARMERS TEL CO INC FRMY 2188 PLEASANT VIEW, CO FARMERS TEL COOP INC FMCP 0290 RAINSVILLE, AL FARMERS TEL COOP INC FMCR 0520 KINGSTREE, SC FAYETTEVILLE TEL CO FYVL 0613 FAYETTEVILLE, OH FBF INC. FBFI NEWARK, NJ FBN AMERICA, INC. DBA FBN INDIANA FBNI 4117 EMMAUS, PA FEDERAL TRANSTEL, INC. FDTR BIRMINGHAM, AL FEDERATED TEL COOP FDRD 1390 CHOKIO, MN FELTON TEL CO INC FETN 1391 FELTON, MN FENNIMORE TEL CO FNMR 0882 MADISON, WI FENTON COOP TEL CO FNTN 1179 FENTON, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–22 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location FIBERNET EQUAL ACCESS, L.L.C. FBNT NEW YORK, NY FIBERNET TELECOM GROUP, INC. FTGX NEW YORK, NY FIBERNET, LLC FETL 4095 CHARLESTON, WV FIDELITY TEL CO FDLT 1882 SULLIVAN, MO FILER MUTUAL TEL CO FILR 2220 FILER, ID FIRST CHOICE LOCAL COMMUNICATIONS, INC FTCL MALVERN, PA FIRST LINE COMMUNICATIONS, LLC FSLC 7741 EGG HARBOR, NJ FIRST REGIONAL TELECOM, LLC FRTC WASHINGTON, DC FIRST WAY SERVICES FWSS HIGHLAND SPRINGS, VA FISHERS ISLAND TEL CORP FSIS 0095 FISHERS ISLAND, NY FIVE AREA TEL COOP INC FARA 2071 MULESHOE, TX FLAT ROCK TEL CO INC FLRK 1012 FLAT ROCK, IL FLATEL, INC. FLTL WEST PALM BEACH, FL FLORALA TEL CO FLAL 0291 FLORALA, AL FLORENCE TEL CO INC FLRN 0453 MS FLORIDA TEL COOP FLRD 0327 FL FOCAL COMMUNICATIONS CORP FCLC 7058 CHICAGO, IL FONOROLA FNRL TORONTO, ON FOOTHILLS RURAL TEL COOP CORP FRUL 0406 STAFFORDSVILLE, KY FOOTVILLE TEL CO FTVL 0883 FOOTVILLE, WI FORESTHILL TEL CO INC FRHL 2318 FORESTHILL, CA FORESTVILLE TEL CO INC FSTV 0884 MILWAUKEE, WI FORT MILL TEL CO FTML 0521 FORT MILL, SC FORT MOJAVE TELECOMMUNICATIONS FTMJ 2200 NEEDLES, CA FORT POINT TELEPHONE COMPANY, INC. FPTT BOSTON, MA FORT RANDALL TELEPHONE COMPANY FTRD 1687 CLARA CITY, MN FRANKLIN TEL CO FKLN 0053 FRANKLIN, VT FRANKLIN TEL CO INC FRNK 0454 MEADVILLE, MS FREEBORN TEL CO FRBR 1393 MN FREEDOM RING COMMUNICATIONS, LLC DBA FRGC 8469 PORTSMOUTH, NH BAYRING COMM FREEPORT TEL & TEL CO FRPT 0202 PA FREMONT TELECOM, CO. FTTI 2222 1690 DEL MAR, ID FRONTENAC TEL LTEE FRNT DISRADI, PQ FRONTIER COM OF AMERICA INC (PREV FLDA ROCHESTER, NY FRONTIER LD) FRONTIER COMM OF NEW YORK, INC (PREV HGLD 0100 MONROE, NY HIGHLAND TEL)

Proprietary — Licensed Material See proprietary restrictions on title page. 11–23 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location FRONTIER COMMUNICATIONS INTERNATIONAL, FCII 7345 ROCHESTER, NY INC. FRONTIER CORPORATION FRRC BINGHAM FARMS, MI FRONTIER LOCAL SERVICE FRLS 7343 ROCHESTER, NY FRONTIER TELEMANAGEMENT INC FTRT 7741 ROCHESTER, NY FROST TEL CO FRST 1394 MN FRUITDALE TEL CO INC FRDL 0292 AL FT ATKINSON TEL CO FTAT 1182 IA FT BEND TEL CO FTBD 2072 ROSENBERG, TX FT JENNINGS TEL CO FTJN 0614 FT JENNINGS, OH FULL SERVICE COMPUTING CORPORATION FLSV 7820 PITTSBURGH, PA FULTON TEL CO INC FLTN 0455 FULTON, MS FUNK TEL CO INC FUNK 1551 NE FUTURE TELCOM SERVICES, INC. FTSI 7733 NEW YORK, NY FUZION WIRELESS COMMUNICATIONS, INC. FUZI BOCA RATION, FL G.W.S.,INC. (SUB GOLDEN WEST GWSI WALL, SD TELECOMMUNICATIONS) GALLATIN RIVER COMMUNICATIONS L.L.C GRCL 1057 CHAPEL HILL, NC GANADO TEL CO INC GAND 2076 GANADO, TX GARDEN VALLEY TEL CO GRVY 1395 ERSKINE, MN GARDONVILLE COOP TEL ASSN GNVL 1396 BRANDON, MN GARRETT TEL CO INC GRRT 0770 IN GARRISON TEL CO INC GARN 2077 TX GARWOOD TEL CO GRWD TX GARY TEL CO GRAY 2058 TX GATEWAY TELECOM, LLC GWTL WHEELING, WV GCR TELECOMMUNICATIONS, INC. GCRT 0445 SOUTH BOSTON, VA GE CAPITAL COMMUNICATION SERVICES GCCS 7728 ATLANTA, GA CORPORATION GEETINGSVILLE TEL CO INC GTVL 0771 FRANKFORT, IN GEM STATE UTILITIES CORP GSUS 2223 CHENEY, WA GENERAL RANGE TEL COOP INC RANG 2251 FORSYTH, MT GENERAL TEL CO OF ILLINOIS GTIL 1015 BLOOMINGTON, IL GENERAL TEL CO OF INDIANA GTIN 0772 FORT WAYNE, IN GENERAL TEL CO OF KENTUCKY GTKY 0407 KY GENERAL TEL CO OF MICHIGAN GTMI 0695 MI GENERAL TEL CO OF OHIO GTOH 0615 OH GENERAL TEL CO OF PENNSYLVANIA GTPA 0169 ERIE, PA GENERAL TEL CO OF THE MIDWEST GTMW 1186 IA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–24 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location GENERAL TEL CO OF WISCONSIN GTWI 0886 WI GENESEO TEL CO GENS 1016 GENESEO, IL GEORGETOWN TEL CO GRTW 0456 LAKESVILLE, MS GEORGIA TEL CORP GERG 0364 BLAKELY, GA GERMANTOWN INDEPENDENT TEL CO GIDT 0618 GERMANTOWN, OH GERMANTOWN TEL CO INC GMTW 0097 GERMANTOWN, NY GERVAIS TEL CO GRVS 2373 GERVAIS, OR GIANTLOOP TELECOM, INC. GLTI 5313 WALTHAM, MA GILA RIVER TELECOMMUNICATIONS INC GLAR 2179 CHANDLER, AZ GILBY TEL CO GLBY 1614 GILBY, ND GILLETTE GLOBAL NETWORK GGNK NY, NY GLACIER STATE TEL CO GLCR 3010 AK GLANDORF TEL CO INC GLND 0619 GLANDORF, OH GLASFORD TEL CO GLFD 1017 GLASFORD, IL GLEN ALLAN TEL CO INC GLAL 0457 GLEN ALLAN, MS GLENWOOD TEL CO GLWD 0365 ATLANTA, GA GLENWOOD TEL MEMBERSHIP CORP GMSP 1553 BLUE HILL, NE GLOBAL BROADBAND, INC. GBBD NEW YORK, NY GLOBAL CONNECT PARTNERS, L.L.C. GCPT KIRKLAND, WA GLOBAL NAPS INC. GNPS NORWOOD, MA GLOBAL TELDATA, INC. GTDA 5603 CHICAGO, IL GLOBAL TELEPHONE CORPORATION GLTC 7900 BOSTON, MA GLOBALEYES TELECOMMUNICATIONS, INC. GBYT MURPHYSBORO, IL GLOBCOM, INC. GLOB 5842 GLENVIEW, IL GOLDEN BELT TEL ASSN INC GBLT 1777 RUSH CENTER, KS GOLDEN WEST COMMUNICATIONS, INC. GWCI 1643 WALL, SD GOLDEN WEST TEL COOP INC GLDN 1659 WALL, SD GOLDFIELD ACCESS NETWORK, L.L.C. GFAN GOLDFIELD, IA GOLDFIELD TEL CO GDFD 1188 GOLDFIELD, IA GOLDTONE COMMUNICATIONS, INC. GOLD BROOKLYN, NY GOODMAN TEL CO GDMN 1886 GOODMAN, MO GORHAM TEL CO INC GRHM 1778 GORHAM, KS GOSFIELD NORTH MUN TEL SYS GNMA 8212 COTTAM, ON GOSHEN TEL CO GSHN 0296 GOSHEN, AL GOTHAM TELEPHONE COMPANY, INC. GOTH NEW HYDE PARK, NY GRACEBA TOTAL COMMUNICATIONS GCBA 0295 ASHFORD, AL GRAETTINGER COOP TEL ASSN GRTG 1189 IA GRAFTON TEL CO GFTN 1020 GRAFTON, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 11–25 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location GRAIG TEL CO GRAG 1535 NE GRANADA TEL CO GRAD 1399 HECTOR, MN GRANBY TEL & TEL CO GRNB 0036 GRANBY, MA GRANBY TEL CO GNBY 1887 GRANBY, MO GRAND MOUND COOP TEL ASSN GRMD 1191 GRAND MOUND, IA GRAND RIVER MUTUAL TEL CO GDRV 1888 PRINCETON, MO GRAND TEL CO INC GRND 1994 JAY, OK GRANDVIEW MUTUAL TEL CO GDVW 1021 PARIS, IL GRANITE STATE TEL INC GNST 0039 WEARE, NH GRANITE TELECOMMUNICATION LLC GRTT QUINCY, MA GRANTLAND TELECOM INC GRNT 0930 MADISON, WI GREAT PLAINS COMMUNICATIONS INC GPCS 1577 BLAIR, NE GREAT PLAINS TEL CO GPNS 1660 SD GREATER MEDIA TELEPHONE, INC. GMTI 4732 WORCESTER, MA GREEN HILLS TEL CORP GNHL 1890 BRECKENRIDGE, MO GREEN STATE COMMUNICATIONS, INC. GSCI EAST ORANGE, NJ GREENWOOD TEL CO INC GNWD 0888 MADISON, WI GRIDLEY TEL CO GRDL 1023 GRIDLEY, IL GRIGGS COUNTY TEL CO GRGS 1615 COOPERSTOWN, ND GRISWOLD COOP TEL CO GRSW 1195 GRISWOLD, IA GROVE HILL TEL CORP GVHL 0297 BAY SPRINGS, MS GROVELINE, LLC. GRVL BOCA RATON, FL GTE ALASKA INC GTAK 3009 ANCHORAGE, AK GTE SOUTHWEST INC GTSW 2080 SAN ANGELO, TX GTE TELEPHONE OPERATIONS GTEX IRVING, TX GTE TELOPS - CENTRAL AREA GTEC IRVING, TX GTE TELOPS-NORTH AREA GTEN WESTFIELD, IN GTE TELOPS-SOUTH AREA GTES TAMPA, FL GTE TELOPS-WEST AREA GTEW THOUSAND OAKS, CA GUADALUPE VALLEY TEL COOP INC GDLP 2083 NEW BRAUNFELS, TX GUEVREMONT INC LE TEL GVMT 8213 STE ROSALIE, PQ GULF TEL CO GLFT 0329 PERRY, FL GULF TEL CO GULF 0298 FOLEY, AL GUNNISON TEL CO GNSN 2279 GUNNISON, UT H & B COMMUNICATIONS INC HBCS 1781 HOLYROOD, KS HADLEY TEL CO INC HDLY 0698 MARION, LA HAGAR TELECOM INC HRTM 0889 HAGER CITY, WI HAGER CITY TEL CO HGCY 0889 HAGER CITY, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 11–26 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location HAINES TEL CO HANS OR HALSTAD TEL CO HLST 1401 HALSTAD, MN HAMILTON COUNTY TEL COOP HMIL 1024 DAHLGREN, IL HAMILTON TEL CO HMTN 1555 AURORA, NE HAMPDEN TEL CO HMPD 0010 HAMPDEN, ME HANCOCK RURAL TEL CORP HRRL 0775 MAXWELL, IN HANCOCK TEL CO HANC 0099 HANCOCK, NY HANCOCK TEL CO HNCK 1403 HANCOCK, MN HANSON COMMUNICATIONS INC DBA MCCOOK HSNC 1116 SALEM, SD TELECOM HANSON COUNTY TEL CO HNSC 1661 ALEXANDRIA, SD HAPPY VALLEY TEL CO HVLY 2321 STOCKTON, CA HARDIN COUNTY TEL CO HRDN 1025 IL HARDY TEL CO HRDY 0259 LOST RIVER, WV HARGRAY TEL CO INC HRGY 0523 HILTON HEAD ISL, SC HARLAN TEL CO HRLN 0620 PLEASANT PLAIN, OH HARMONY TEL CO HRMY 1404 HARMONY, MN HAROLD TEL CO INC HRLD 0408 HAROLD, KY HARRISONVILLE TEL CO HNVL 1026 WATERLOO, IL HART TEL CO HART 0368 HARTWELL, GA HARTINGTON TEL CO HTNT 1556 HARTINGTON, NE HARTLAND & ST. ALBANS TEL CO HSAS 0011 HARTLAND, ME HARTMAN TEL EXCH INC HTMN 1557 DANBURY, NE HARVARD NET INC HVNT 8828 PORTLAND, ME HAT ISLAND TEL CO HILD 2417 LANGLEY, WA HAVILAND TEL CO INC HVLD 1780 HAVILAND, KS HAWKEYE TEL CO HWKY 1199 HAWKEYE, IA HAWKINSVILLE TEL CO HWVL 0369 HAWKINSVILLE, GA HAXTUN TEL CO HAXT 2190 WISNER, NE HAY MUN TEL SYS HMNL 8214 ZURICH, ON HAYNEVILLE TEL CO INC HYVL 0299 HAYNEVILLE, AL HEADWATERS TEL CO HDWT 0891 RHINELANDER, WI HEART OF IOWA TEL COOP HTIA 1297 UNION, IA HEARTLAND COMMUNICATIONS, INC(SUB HRTL 0160 KIMBALL, SD MIDSTATE) HEARTLAND TELECOMMUNICATIONS COMPANY HRTI 1109 MANKATO, MN OF IOWA HEATH SPRINGS TEL CO HESG 0524 HEATH SPRINGS, SC HEINS TEL CO HENS 0481 SANFORD, NC

Proprietary — Licensed Material See proprietary restrictions on title page. 11–27 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location HELIX TEL CO HELX 2376 HELIX, OR HEMINGFORD COOP TEL CO HMFR 1558 HEMINGFORD, NE HENDERSON COOP TEL CO HNSN 1559 HENDERSON, NE HENNEPIN TEL CO HNPN OK HENRY COUNTY TEL CO HNRY 1029 GENESEO, IL HERSHEY COOP TEL CO HRSH 1561 HERSHEY, NE HIAWATHA TEL CO HWTH 0713 MUNISING, MI HICKORY TEL CO HCKR 0171 AUGUSTA, MI HICKORY TEL CO HWDW 0171 HICKORY, PA HIGHLAND TEL COOP HGND 0237 MONTEREY, VA HIGHLAND TEL COOP INC HLND 0565 SUNBRIGHT, TN HILL COUNTRY TEL COOP INC HCNY 2086 INGRAM, TX HILLS TEL CO INC HILL MN HILLS TEL CO INC HILS 1405 DELL RAPIDS, SD HILLSBORO TEL CO INC HLBO 0892 HILLSBORO, WI HILLSBOROUGH & MONTGOMERY TEL CO HMGY 0140 NJ HILLSDALE COUNTY TEL CO HLDL 0700 MI HINTON TEL CO OF HINTON OK INC HINT 1995 HINTON, OK HOHMAN TEL CO HHMN 1407 PELICAN RAPIDS, MN HOLWAY TEL CO HLWY 1929 MARION, LA HOME TEL CO HMEY 1408 GRAND MEADOW, MN HOME TEL CO HOEY 1032 ST JACOB, IL HOME TEL CO HOMX 0458 HARDY, AK HOME TEL CO HOMZ 2377 MADISON, WI HOME TEL CO INC HOEM 0527 MONCKS CORNER, SC HOME TEL CO INC HOME 1782 GALVA, KS HOME TEL CO INC HOOM 0778 WALDRON, IN HOME TEL CO OF NEBRASKA HMNE 1562 BRADY, NE HOME TEL CO OF PITTSBORO HPBO 0777 PITTSBORO, IN HOMETOWN CABLEVISION CORPORATION HTCC SOUTH DAYTON, NY HOOD CANAL TEL CO INC DBA HOOD CANAL HCNL 0403 UNION, WA COMM. HOOKS COMMUNICATIONS GROUP, INC. HCGI FALLS CHURCH, VA HOOKS TEL CO INC HOKS 2089 TX HOOPER TEL CO HOPR 1563 HOPPER, NE HOPPER TEL CO HPPR 0300 ALTOONA, AL HORNITOS TEL CO HRNT 2322 STOCKTON, CA HORRY TEL COOP INC HORY 0528 CONWAY, SC

Proprietary — Licensed Material See proprietary restrictions on title page. 11–28 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location HOSPERS TEL EXCH INC HPRS 1202 HOSPERS, IA HOT SPRINGS TEL CO HTSP 2241 HOT SPRINGS, MT HUBBARD COOP TEL ASSN HBRD 1203 HUBBARD, IA HUDSON VALLEY DATANET LLC. HVDN MONTGOMERY, NY HUGHES TEL CO INC HGHS 0459 BAILEY, MS HUMPHREYS COUNTY TEL CO HMPH 0566 NEW JOHNSONVILLE, TN HUNTINGDON & CENTRE COUNTY TEL HCCY 0174 PA HURON & KINLOSS MUN TEL SYS HKML 8215 RIPLEY, ON HURONTARIO TELEPHONES LTD HRTR 8216 THEDFORD, ON HUTCHINSON TEL CO HTSN 1409 HUTCHINSON, MN HUXLEY COOP TEL CO HXLY 1205 HUXLEY, IA HYDRO TEL CO HYDR 1999 OK HYPERION TELECOMMUNICATIONS INC HYPT 7129 PITTSBURGH, PA HYPERION TELECOMMUNICATIONS OF HTVT 7188 WILLISTON, VT VERMONT I.C.U.C. , INC. ICUC NORTH BELLMORE, NY IAMO TEL CO IAMO 1206 COIN, IA ICG TELECOM GROUP ICGL 7150 DENVER, CO IDS TELCOM IDST 5739 MIAMI, FL IDT CORPORATION IDTO NEWARK, NJ IG2, INC. (PREV COMPUTER BUSINESS SCIENCES, COMB KEW GARDENS, NY INC. ILLICOM TELECOMMUNICATIONS, INC. ILLI PAXTON, IL ILLINOIS BELL TEL CO LB 9329 CHICAGO, IL ILLINOIS CONSOLIDATED TEL CO ILCD 1037 MATTOON, IL INDIANA BELL TEL CO NB 9325 INDIANAPOLIS, IN INDIANHEAD TEL CO INHD 0936 WEYERHAUSER, WI INDIANTOWN TEL SYSTEM INTW 0331 INDIANTOWN, FL INDUSTRY TEL CO INDS 2093 INDUSTRY, TX INLAND TEL CO INLD 2423 ROSLYN, WA INLAND TEL CO INLN 1038 CHAMPAIGN, IL INLEC COMMUNICATIONS, INC. INLC PHILADELPHIA, PA INTEGRATED TELEPHONE SERVICES ITSC 2761 WAYNE, NJ CORPORATION INTEGRATED TELETECHNOLOGIES INC. D/B/A INTI 7716 NEW YORK, NY ITELECOM INTELNET SERVICES OF NORTH AMERICA, INC. ISNA 7095 WEST BERLIN, NJ INTER MOUNTAIN CABLE DBA MIKROTEC IMCM 2623 HAROLD, KY COMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 11–29 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location INTERACTIVE COMMUNICATIONS SYSTEMS, INC. IRTC BLACKWOOD, NJ INTERACTIVE INFORMATION NETWORK, INC. IINI 2935 SYOSSET, NY INTERBEL TEL COOP INC INBL 2242 EUREKA, MT INTER-COMMUNITY TEL CO ICMY 1616 NOME, ND INTERCONTINENTAL COMMUN. GROUP DBA ICGF FT. LAUDERDALE, FL FUSION TELECOM INTER-COUNTY TEL CO ICTY MO INTERGLOBE COMMUNICATIONS IGBI STATEN ISLAND, NY INTERIOR TEL CO INC INTR 3011 ANCHORAGE, AK INTER-ISLAND TEL CO IRLD 2422 FRIDAY HARBOR, WA INTERMEDIA COMMUNICATIONS INC. ITMC 7149 TAMPA, FL INTERMOUNTAIN TEL & POWER CO IMTN 2243 MT INTERNAL TELCORDIA USE LOAC INTERNATIONAL DESIGN GROUP DBA USA ISPU 7093 DANIA, FL TELECOM INTERNATIONAL EXCHANGE NETWORKS, LTD. IENL 7895 NEW YORK, NY INTERNATIONAL TELCOM, LTD IETL 7485 SEATTLE, WA INTERNATIONAL TELEPHONE GROUP, INC. IATG 7896 MORRISTOWN, NJ INTERSTATE 35 TEL CO ITFE 1209 TRURO, IA INTERSTATE TEL CO ITSE 0371 WEST POINT, GA INTERSTATE TELECOM COOP INC ITST 1654 CLEAR LAKE, SD INTRASTATE TELEPHONE CO.,INC(SUB- INTS 0159 CLEAR LAKE, SD INTERSTATE TELE) INVALID - DO NOT USE CTDM * INVALID - DO NOT USE GTDS * INVALID - DO NOT USE GTSA * IOWA NETWORK SERVICES INC IANK WEST DES MOINES, IA IOWA TELECOM COMMUNICATIONS, INC. IATC 8248 NEWTON, IA IOWA TELECOMMUNICATIONS SERVICES, INC. IATS NEWTON, IA IRONTON TEL CO IRTN 0175 COPLAY, PA IROQUOIS TEL CORP IRQS 0101 NY ISLAND TEL CO ISAD 0007 FRENCHBORO, ME ISLAND TEL CO ISND 0677 BEAVER ISLAND, MI ISLAND TEL CO LTD THE ISLD 8087 CHARLOTTETOWN, PE IWL CONNECT, INC. IWLC HOUSTON, TX J.B.N. TEL CO INC JBNT 1785 WETMORE, KS JAGUAR COMMUNICATIONS, INC. JAGC OWATONNA, MN JAMES VALLEY COOP TEL CO JVLY 1664 GROTON, SD JANE STREET COMMUNICATIONS, INC JSCI 7320 NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 11–30 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location JATO COMMUNICATIONS CORP. OF VIRGINIA JATV 3541 DENVER, CO JATO OPERATING CORP JATO 2862 DENVER, CO JATO OPERATING TWO CORP. JATT 2936 DENVER, CO JEFFERSON TEL CO JFRN 1666 JEFFERSON, SD JEFFERSON TEL CO JFSN 1212 JEFFERSON, IA JETMORE TEL CO JTMR 1786 KS JOHNSON TEL CO JHSN 1410 REMER, MN JONES INTERCABLE JNIC ALEXANDRIA, VA JORDAN SOLDIER VALLEY COOP TEL CO JSVY 1213 SOLDIER, IA JTC COMMUNICATIONS, INC. JTCC 4277 LOUISVILLE, KY JUBILEE TELECOM, L.L.C. JUBT UPPER SADDLE RIVER, NJ JUNEAU & DOUGLAS TEL CO JDLS 3012 AK K & M TEL CO KMTC 1565 CHAMBERS, NE K & S COMMUNICATIONS KSCM CHAMPLAIN, NY K L M TEL CO KLMT 1900 RICH HILL, MO K M P TEL CO KMPT 1413 KERKHOVEN, MN KAC COMMUNICATIONS COMPANY KACC 9688 EAST ORANGE, NJ KADOKA TEL CO KADK 1667 KADOKA, SD KALAMA TEL CO KALM 2426 KALAMA, WA KALEVA TEL CO KLVA 0703 KALEVA, MI KALIDA TEL CO INC KALD 0625 KALIDA, OH KALONA COOP SWITCHBOARD CO KLSB 1214 IA KALONA COOP TEL CO KALN 1214 KALONA, IA KAMAS-WOODLAND TEL CO KMAS 2280 KAMAS, UT KANOKLA TEL ASSN KNKL 1788 ANTHONY, KS KANSAS STATE TEL CO KSST 1789 GARDNER, KS KANSAS STATE TELCO DBA CONTEL OF E MO CTEM 1883 OVERLAND PARK, KS KAPLAN TEL CO KPLN 0432 KAPLAN, LA KARNAK TEL CO KRNK 2095 TX KASSON & MANTORVILLE TEL CO KMVL 1412 KASSON, MN KCI LONG DISTANCE, INC. KCII 7735 SYRACUSE, NY KEARSARGE TEL CO KRSR 0045 NEW LONDON, NH KEEWATIN MUN TEL SYS KWYD 8217 KEEWATIN, ON KENDALL TELEPHONE INC KEND 0924 KENDALL, WI KENNEBEC TEL CO KNBC 1668 KENNEBEC, SD KENORA MUN TEL SYS KNRA 8218 KENORA, ON KERMAN TEL CO KRMN 2324 KERMAN, CA KERRVILLE TEL CO KRVL 2097 KERRVILLE, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 11–31 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location KETCHIKAN PUBLIC UTILITIES KTKN 3013 KETCHIKAN, AK KEYSTONE FARMS COOP TEL CO KFRS 1217 KEYSTONE, IA KEYSTONE KALLING, INC. KYKL 6166 PHILADELPHIA, PA KEYSTONE-ARTHUR TEL CO KARR 1567 KEYSTONE, NE KINGDOM TEL CO KNDM 1901 AUXVASSE, MO KINGSLEY TEL CO KGSL 0705 KINGSLEY, MI KINSMAN MUTUAL TEL CO KNMN 1041 KINSMAN, IL KMC TELECOM OF VIRGINIA, INC KMCV 6086 BEDMINSTER, NJ KNIPPA TEL CO KNIP 2099 KNIPPA, TX KOTZEBUE TEL COOP KTZB 3019 AK LA BAIE DU FEBVRE SOCIETE DE TEL LABA 8236 BAIEVILLE, PQ LA HARPE TEL CO INC LHRP 1791 LA HARPE, KS LA JICARITA RURAL TEL COOP INC LJRL 2263 MORA, NM LA MOTTE TEL CO LAMT 1222 LA MOTTE, IA LA PORTE CITY TEL CO LPCY 1220 LA PORTE CITY, IA LA REPUBLICA COMMUNICATIONS LARC NORTH BRUNSWICK, NJ LA VALLE TEL COOP LVLE 0899 LA VALLE, WI LA WARD TEL EXCH INC LWRD 2103 LAWARD, TX LACKAWAXEN TEL CO LCKW 0177 ROWLAND, PA LAFOURCHE TEL CO LFCH 0433 LAROSE, LA LAHARPE TEL CO LRPE 1043 LAHARPE, IL LAKE DALLAS TEL CO LKDL 2101 LAKE DALLAS, TX LAKE LIVINGSTON TEL CO LAKE 2104 LIVINGSTON, TX LAKE MILLS TEL CO LKML 1221 IA LAKEDALE TEL CO LDLE 1414 ANNANDALE, MN LAKEFIELD TEL CO LKFD 0896 NEWTON, WI LAKER TELECOMMUNICATIONS CORPORATION LKTI ANDOVER, NJ LAKESHORE TEL CO LKSH 0858 CECIL, WI LAKESIDE COMMUNICATIONS, INC. LKSC 0102 ROCKLAND, ID LAKESIDE TEL CO LKSD 1011 CHAMPAIGN, IL LAKESIDE TEL CO LKSE 2102 TX LAKESIDE TEL CO INC LSID 0457 GLEN ALLAN, MS LAKEWOOD TEL CO LKWD 0178 BARNESVILLE, PA LAMAR COUNTY TEL CO LRCT 0301 MILLPORT, AL LAMBDA COMMUNICATIONS, INCORPORADO LCIN SAN JUAN, PR LAMBTON INC LA CIE DE TEL LBTN 8219 LAMBTON, PQ LANCASTER TEL CO LNCS 0531 LANCASTER, SC LANSDOWNE RURAL TEL CO LTD LNSD 8220 LANSDOWNE, ON

Proprietary — Licensed Material See proprietary restrictions on title page. 11–32 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location LARSEN-READFIELD TEL CO LRSN 0898 MILWAUKEE, WI LATHROP TEL CO LTHP 1932 PRINCETON, MO LAUREL HIGHLAND TEL CO LHLD 0179 STAHSTOWN, PA LAUREL TEL CO INC LARL 1223 LAUREL, IA LAVACA TEL CO LAVC 1704 LAVACA, AR LBC TELEPHONY, INC. LBTI 8854 PARSIPPANY, NJ LCI INTERNATIONAL TELECOM CORP LCII 7560 MCLEAN, VA LDM SYSTEMS INC. LDMS 7711 254 S. MAIN STREET, NY LE GROUPE VIDEOTRON ITEE LGVI 8306 DALLAS, TX LEACO RURAL TEL COOP INC LECO 2264 LOVINGTON, NM LEAF RIVER VALLEY TEL CO LRVY 1045 LEAF RIVER, IL LEC-LINK LCLK 7971 ANTIOCH, TN LEEDS TEL CO LEDS 0302 LEEDS, AL LEESPORT TEL CO LSPT 0180 PA LEHIGH VALLEY COOP TEL ASSN LEGH 1225 LEHIGH, IA LEMHI TEL CO LEMH 2225 ID LEMONWEIR VALLEY TEL CO LMWR 0900 CAMP DOUGLAS, WI LENNON TEL CO LNON 0708 LENNON, MI LEONORE MUTUAL TEL CO LENR 1046 TONICA, IL LE-RU TEL CO LERU 1908 STELLA, MO LESLIE COUNTY TEL CO LESL 0411 HYDEN, KY LEVEL 3 COMMUNICATIONS, LLC LVLC LOUISVILLE, CO LEVY ASSOCIATES INC. LEVY BROOKLYN, NY LEWIS RIVER TEL CO INC LRVR 2427 LA CENTER, WA LEWISBERRY TEL CO LWBY 0181 DALLAS, PA LEWISPORT TEL CO INC LWPT 0412 LEWISPORT, KY LEXINGTON TEL CO LXTN 0483 LEXINGTON, NC LIBERTY CENTER TEL CO LBCT 0784 WARREN, IN LIBERTY TEL & COMMUNICATIONS INC LCMS 1705 MONROE, LA LIBERTY TEL CO LBRT 1706 MONROE, LA LIGHTBONDING.COM VA INC. LBVA CHANTILLY, VA LIGHTSHIP TELECOM, L.L.C. LTPT NASHUA, NH LIGHTSOURCE TELECOM I, LLC. LGST 4303 TOLEDO, OH LIGHTWAVE COMMUNICATIONS, LLC LWCL LAUREL, MD LIGONIER TEL CO INC LGNR 0783 LIGONIER, IN LINCOLN COUNTY TEL SYSTEM INC LCLN 2351 PIOCHE, NV LINCOLN TEL & TEL CO LNCL 1568 LINCOLN, NE LINCOLN TEL CO INC LHLN 2244 LINCOLN, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 11–33 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location LINCOLNVILLE COMMUNICATIONS, INC. LNVC 8933 LINCOLNVILLE, ME LINCOLNVILLE TEL CO LNVL 0003 LINCOLNVILLE, ME LINE SYSTEMS, INC LINE BROOMALL, PA LINEONE LLC LNNE 6186 WEST HARTFORD, CT LINN RUAL TEL CO LINR KS LIPAN TEL CO LIPN 2105 LIPAN, TX LISMORE COOP TEL CO LSMR 1419 LISMORE, MN LITTLE MIAMI COMMUNICATIONS CORP LMCC 0613 FAYETTEVILLE, OH LIVINGSTON TEL CO LVSN 2107 LIVINGSTON, TX LOCAL DIALTONE SERVICE INC (PREV SHOPPERS SHED 8380 GREAT NECK, NY EDGE INC LOCAL FIBER, LLC LCFB 7880 ROCHESTER, NY LOCAL LINE AMERICA, INC. LLAI AKRON, OH LOCAL TELCOM HOLDINGS, LLC DBA LTTC CALABASAS, CA TRANSPOINT COMMUN. LOCKHART TEL CO INC LKRT 0532 LOCKHART, SC LOG ON AMERICA, INC. LGOA PROVIDENCE, RI LOGAN TEL COOP INC LOGN 0413 AUBURN, KY LONE ROCK COOP TEL CO LNRK 1228 LONE ROCK, IA LONG ISLAND TELEPHONE COMPANY LITC 8289 GREAT NECK, NY LONSDALE TEL CO INC LNDL 1422 LONSDALE, MN LOOKING GLASS NETWORKS, INC. LGNI ADDISON, TX LORETEL SYSTEMS INC LORE 1443 ADA, MN LORETTO TEL CO INC LRTT 0570 LORETTO, TN LOST NATION-ELWOOD TEL CO LNED 1229 LOST NATION, IA LOUISIANA WESTERN TEL CO LAWN 0442 MONROE, LA LOWRY TEL CO LWRY 1423 LOWRY, MN LUCK TEL CO LUCK 0902 LUCK, WI LUDLOW TEL CO LDLW 0058 LUDLOW, VT LUFKIN-CONROE TEL EXCH INC LFKN 2109 LUFKIN, TX LYNNVILLE COMMUNITY TEL CO INC LCMY 1232 LYNNVILLE, IA M & L ENTERPRISES, INC. MLEI 1402 MIDVALE, ID MABEL COOP TEL CO MABL 1424 MABEL, MN MACOMB MCMB 0103 NY MADELIA TEL CO MADL 1425 MADELIA, MN MADELINE ISLAND TEL CO MDLN 0904 CARNEY, MI MADISON COUNTY TEL CO INC MDSC 1709 HUNTSVILLE, AR MADISON TEL CO MADN 1049 HAMEL, IL MADISON TEL CO INC MDIS 1801 MADISON, KS

Proprietary — Licensed Material See proprietary restrictions on title page. 11–34 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location MAGAZINE TEL CO MGZN 1710 MAGAZINE, AR MAHANOY & MAHANTANGO TEL CO MMTG 0183 HERNDON, PA MALHEUR HOME TEL CO MLHR 2456 ONTARIO, OR MANAWA TEL CO INC MNWA 0905 MANAWA, WI MANCHESTER-HARTLAND TEL CO MHRD 1426 MANCHESTER, MN MANHATTAN TELECOMM CORP DBA MHNT 7677 NEW YORK, NY METROPOLITAN TELECOMM MANILLA TEL CO MNLL 1235 MANILLA, IA MANITOBA TEL SYS MSYS 8088 WINNIPEG, MB MANITOULIN ISLAND TEL CO LTD MNIL 8222 MINDEMOYA, ON MANKATO CITIZENS TEL CO MCTS 1427 MANKATO, MN MANLEY UTILITY CO MUTY 3014 AK MANTI TEL CO MANT 2282 MANTI, UT MAPLE TEL COOP INC MAPL 0907 MAPLE, WI MARGARETVILLE TEL CO INC MRGV 0104 MARGARETVILLE, NY MARIANNA-SCENERY HILL TEL CO MRSY 0185 MARIANNA, PA MARITIME TEL & TEL CO LTD MRTM 8089 HALIFAX, NS MARK TWAIN RURAL TEL CO MTRL 1914 HURDLAND, MO MARNE & ELK HORN TEL CO MEHN 1237 ELK HORN, IA MARQUETTE-ADAMS TEL COOP INC MAQS 0908 OXFORD, WI MARSEILLES TEL CO OF MARSEILLES MRSL 1050 METAMORA, IL MARTELLE COOP TEL ASSN MRTL 1238 MARTELLE, IA MASHELL TEL CO INC MSHL 2431 EATONVILLE, WA MASSACHUSETTS LOCAL TELEPHONE COMPANY, MLTC 7390 DORCHESTER, MA INC MASSENA TEL CO MSSN 1239 MASSENA, IA MATANUSKA TEL ASSN INC MTSK 3015 PALMER, AK MAW INC MAWI 8602 FLEETWOOD, PA MAXWELL TEL EXCH MXWL 2266 NM MAZEPPA TEL CO MZPP 1429 MN MCCLELLANVILLE TEL CO INC MLVL 0533 MCCLELLANVILLE, SC MCCLURE TEL CO MCCR 0598 MCCLURE, OH MCCOOK COOP TEL CO MCCK 1669 SALEM, SD MCDANIEL TEL CO MCDN 2430 SALKUM, WA MCDONALD COUNTY TEL CO MCDD 1912 PINEVILLE, MO MCDONOUGH TEL COOP MCDG 1047 COLCHESTER, IL MCGRAW COMMUNICATIONS, INC. MCGC NEW YORK, NY MCIMETRO ACCESS TRANSMISSION SERVICES, MCIM 7229 VIENNA, VA INC

Proprietary — Licensed Material See proprietary restrictions on title page. 11–35 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location MCLOUD TEL CO MCLD 2006 OKLAHOMA CITY, OK MCNABB TEL CO MCNB 1048 MCNABB, IL MEBANE HOME TEL CO INC MBNE 0485 MEBANE, NC MECHANICSVILLE TEL CO MCHV 1241 MECHANICSVILLE, IA MEDIA LOG INC DBA TRANSBEAM TRNS NEW YORK, NY MEDIAONE TELECOMMUNICATIONS CORP MOTC 7772 JACKSONVILLE, FL MEDIAPOLIS TEL CO MDPS 1251 MEDIAPOLIS, IA MEDICINE BOW TEL CO INC MNBW 2294 MEDICINE BOW, WY MEDICINE PARK TEL CO MDPK 2008 MEDICINE PARK, OK MEG RADIO MEGR NEWARK, NJ MEGA COMM LLC MGCM ROSELLE, NJ MEGACLEC, INC. MGCL 3203 FALL RIVER, MA MEGATEL, CORPORATION MGTL 7553 QUEENS VILLAGE, NY MEGSINET-CLEC, INC. MGCI CHICAGO, IL MELROSE TEL CO MLRS 1430 MELROSE, MN MERCHANTS & FARMERS TEL CO MCNT 0788 HILLSBORO, IN MERCHANTS AND FARMERS TEL CO MFRS 0235 VA MERIDEN TEL CO MRDN 0046 MERIDEN, NH MERRIMACK COUNTY TEL CO MRMC 0047 CONTOOCOOK, NH MESCALERO APACHE TELECOM, INC. MCAT 1231 MESCALERO, NM MESICK TEL CO MSCK 0710 MI METAMORA TEL CO MTMO 1053 METAMORA, IL METCOM ACCESS INC MCMA 7882 PLAINVIEW, NY METRACOM CORPORATION METR 7729 BOSTON, MA METRO ONE TELECOM MROT BEAVERTON, OR METRO TELECONNECT, INC MTTC GAITHERSBURG, MD METROMEDIA FIBER NETWORK SERVICES INC MFNS 6099 WHITE PLAINS, NY METROPOLITAN FIBER SYSTEMS INC MFSI OAKBROOK TERRACE, IL METROPOLITAN TELECOMMUNICATIONS MTTM MANHATTAN, NY MEZCO, LLC. MZCO ADAMS, MA MFS INTELENET OF WASHINGTON, D.C., INC. MFSL 7445 WESTMONT, IL MFS TELECOM, INC. MFST 7108 DENVER, CO MGW TELEPHONE CO INC MGWL 0238 WILLIAMSVILLE, VA MICHIGAMA TEL CO MHGM 0702 MI MICHIGAN BELL TEL CO MB 9323 DETROIT, MI MICROTEL COMMUNICATIONS CORP. MCRT 7634 NEW YORK, NY MID CENTURY TEL COOP INC MCNY 1054 CANTON, IL MID INDIANA TEL CORP MDIN 0831 IN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–36 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location MID OHIO TEL CORP MDOH NEWARK, OH MID PENN TEL CORP MPNN 0176 PA MID STATE TEL CO MSTE 1433 SPICER, MN MID-AMERICA TEL INC MDAC 2010 STONEWALL, OK MID-CAROLINA TEL CO MDCL 0504 NC MIDCO COMMUNICATIONS, INC. MDCC SIOUX FALLS, SD MIDCOM COMMUNICATIONS INC.(LOGICALL, MDMC 7539 SEATTLE, WA ATN, TELENAT) MID-COMMUNICATIONS INC MDCN 1375 MANKATO, MN MIDDLE POINT HOME TEL CO MPHM 0633 MIDDLE POINT, OH MIDDLEBURGH TEL CO MDBG 0105 MIDDLEBURGH, NY MID-GEORGIA TEL CORP MDGA 0357 GA MID-HUDSON COMMUNICATIONS, INC. MDHC 7989 CATSKILL, NY MID-IOWA TEL CO MDIA 1187 GILMAN, IA MIDLAND TEL CO MLND 1055 CHAMPAIGN, IL MID-MAINE TELECOM MMTL 3315 BANGOR, ME MID-MAINE TELPLUS DBA MID-MAINE MMTP ME COMMUNICATIONS MID-MICHIGAN TEL CORP MDMI MI MID-MISSOURI TEL CO MDMO 1917 PILOT GROVE, MO MID-PLAINS RURAL TEL COOP INC MPRL 2112 TULIA, TX MID-PLAINS TEL INC MPLS 0881 MIDDLETON, WI MID-RIVERS TEL COOP INC MRVS 2246 CIRCLE, MT MID-SOUTH TEL CO INC MSTH 0460 RIENZI, MS MIDSTATE TEL CO MIDS 1670 KIMBALL, SD MIDSTATE TEL CO MSAT 1617 STANLEY, ND MID-STATE TEL CO MDTT 1433 TX MIDVALE TEL EXCH INC MDVL 2226 MIDVALE, ID MIDWAY MUTUAL TEL CO MIDW 0188 PA MIDWAY TEL CO MDWY 0711 WATTON, MI MIDWAY TEL CO MWAY 0909 MADISON, WI MIDWEST TEL CO MDWS 1431 PARKERS PRAIRIE, MN MIDWEST TEL CO MWST 1431 MI MIDWESTERN TEL CO INC MDWN 2009 OK MILES COOP TEL ASSN MILS 1242 MILES, IA MILLENNIUM WIRELESS GROUP, INC. MWGI 2525 WOODBURG, NY MILLER TEL CO MILR 1243 GARNER, IA MILLER TEL CO INC MLLR 1920 MILLER, MO MILLINGTON TEL CO INC MGTN 0571 MILLINGTON, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–37 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location MILLRY TEL CO MLRY 0304 MILLRY, AL MILLTOWN MUTUAL TEL CO MLTW 0910 MILLTOWN, WI MILOT INC TEL MILT 8221 ST PAULIN, PQ MINBURN TEL CO MNBN 1245 MINBURN, IA MINERVA VALLEY TEL CO INC MVLE 1246 ZEARING, IA MINFORD TEL CO MNFR 0634 MINFORD, OH MINNESOTA EQUAL ACCESS NETW SVCS INC MEAN PLYMOUTH, MN MINNESOTA LAKE TEL CO MNLK 1437 MINNESOTA LAKE, MN MINNESOTA VALLEY TEL CO INC MNVY 1439 FRANKLIN, MN MINOT TELEPHONE COMPANY MNOT 1624 MINOT, ND MISSISSIPPI TEL & COMM INC MSTC 0462 MS MISSISSIPPI TEL CORP MSPI 0461 MS MISSOURI TEL CO MORI 1904 COLUMBIA, MO MMT GORI, INC. MMGO MONONGAHELA, PA MOAPA VALLEY TEL CO MOAP 2353 OVERTON, NV MOBRIDGE TELECOMMUNICATIONS CO(SUB MBDG 1671 HAZEN, ND WEST RIVER) MODERN COOP TEL CO MODN 1247 SOUTH ENGLISH, IA MODERN TELECOMMUNICATIONS COMPANY MDTC 3335 GREEN CITY, MO MO-KAN DIAL INC MKDL 1807 LOUISBURG, KS MOLALLA TEL CO MLLL 2383 MOLALLA, OR MOMENTUM TELECOM INC MTCI 8358 SAN RAFAEL, CA MON-CRE TEL COOP INC MCRE 0305 RAMER, AL MONDOVI TEL CO MNDV 0912 MONDOVI, WI MONITOR COOP TEL CO MNTR 2384 WOODBURN, OR MONMOUTH TELEPHONE AND TELEGRAPH, INC. MNTT RED BANK, NJ MONON TEL CO INC MONN 0790 MONON, IN MONROE COUNTY TEL CO MNRO 0913 MILWAUKEE, WI MONROE TEL CO MONR 2385 MONROE, OR MONROEVILLE TEL CO MOVL 0306 MONROEVILLE, AL MONROVIA TEL CORP MNRV 0791 IN MONTEZUMA MUTUAL TEL CO MTZM 1248 MONTEZUMA, IA MONTROSE MUTUAL TEL CO MTRS 1058 DIETERICH, IL MOORE & LIBERTY TEL CO MRLB 1622 ENDERLIN, ND MORENCI HOME TEL CO MRNC 0712 MI MORLEY TEL CO MRLY 1249 MORLEY, IA MORNINGTON MUN TEL SYS MNGT 8223 MILVERTON, ON MOSEL & CENTERVILLE TEL CO MCRL 0914 MADISON, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 11–38 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location MOSINEE TEL CO MCSN 0915 MOSINEE, WI MOULTRIE INDEPENDENT TEL CO MIDT 1060 LOVINGTON, IL MOUND BAYOU TEL AND COMMUNICATIONS INC MNBY 0462 BAY SPRINGS, MS MOUNDRIDGE TEL CO MNRG 1808 MOUNDRIDGE, KS MOUNDVILLE TEL CO MNVL 0307 MOUNDVILLE, AL MOUNTAIN BELL MS 9636 DENVER, CO MOUNTAIN HOME TEL CO INC MHOM 1711 MONROE, LA MOUNTAIN RURAL TEL COOP CORP INC MRUL 0414 WEST LIBERTY, KY MOUNTAIN TELECOMMUNICATIONS INC MTTL TEMPE, AZ MOUNTAIN VIEW TEL CO MTVW 1712 MOUNTAIN VIEW, AR MOUNTAINET TELEPHONE COMPANY MTNT 3185 GATE CITY, VA MPOWER COMMUN CORP(PREV MGC COMMUN, MGCC 7050 LAS VEGAS, NV INC) MT ANGEL TEL CO MTAN 2386 MT ANGEL, OR MT HOREB TEL CO MTHB 0916 MT HOREB, WI MT PULASKI TEL & ELEC CO MTPS 1061 LINCOLN, IL MT RUSHMORE TEL CO MTRM 1660 KEYSTONE, SD MT VERNON TEL CO MVRN 0917 MADISON, WI MTCO COMMUNICATIONS, INC MTCO METAMORA, IL MUDLAKE TEL COOP ASSN INC MDLK 2227 DUBOIS, ID MUENSTER TEL CORP OF TEXAS MNST 2116 MUENSTER, TX MUKLUK TEL CO INC MKLK 3016 TELLER, AK MULBERRY COOP TEL CO INC MLBY 0792 MULBERRY, IN MUNISING TEL CO MNSG 0713 MI MURDOCKSVILLE IND TEL CO (NAME CHANGE) MRDV 0189 PA MURRAYSVILLE TEL CO MUVL 0190 EXPORT, PA MUSTANG TEL CO MSTN 2117 MONROE, LA MUTUAL TEL CO LTRV 1809 LITTLE RIVER, KS MUTUAL TEL CO MUTL 1252 SIOUX CENTER, IA MUTUAL TEL CO OF MEDIAPOLIS MTUL 1251 IA MUTUAL TEL CO OF MORNING SUN MMSN 1250 MORNING SUN, IA MVX.COM COMMUNICATIONS, INC MVXC NOVATO, CA MYRTLE TEL CO INC MYTL 0449 HARDY, AK NA COMMUNICATIONS, INC NACS 8945 ABINGDON, VA NANTES INC LA CIE DE TEL NANT 8224 LAMBTON, PQ NATIONAL COMMUNICATIONS, LLC NLOL 7847 MILWAUKEE, WI NATIONAL DIGITAL SUBSCRIBER LINE.COM. INC. NDSL HICKSVILLE, NY NATIONAL MOBILE COMMUNICATIONS NMBC 3454 S. BURLINGTON, UT CORPORATION

Proprietary — Licensed Material See proprietary restrictions on title page. 11–39 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location NATIONAL TEL CO OF ALABAMA NLAL 0286 MONROE, LA NATIONAL TELEPHONE COOPERATIVE NTCA WASHINGTON, DC ASSOCIATION (NTCA) NATIONAL TELEPHONE EXCHANGE, INC. NTEI 9656 HARRISBURG, PA NATIONAL UTILITIES INC NTNL 3017 PORT TOWSEND, WA NAVIGATOR TELECOMMUNICATIONS, LLC NAVT 2604 NORTH LITTLE ROCK, AR NE TEL CO NBRS 1573 NE NEBCOM, INC. NEBC 1527 JACKSON, NE NEBRASKA CENTRAL TEL CO NECE 1574 GIBBON, NE NECLEC, LLC NLEC HINGHAM, MA NEHALEM TEL & TEL CO NHLM 2387 NEHALEM, OR NELSON TEL COOP NLSN 0918 DURAND, WI NELSON-BALL GROUND TEL CO NBGD 0375 NELSON, GA NEMONT TEL COOP INC NMNT 2247 SCOBEY, MT NET2000 COMMUNICATIONS OF VIRGINIA NCVA 2195 FOX MILL RD, HERNDON, VA NETCARRIER TELECOM, INC. NETC 5493 LANSDALE, PA NETSTREAM NTSR ROSEVILLE, CA NET-TEL COMMUNICATIONS NTLC WASHINGTON, DC NET-TEL CORPORATION NEEC 2640 WASHINGTON, DC NETWORK ACCESS SOLUTIONS NASS STERLING, VA NETWORK PLUS INC NWPS 7648 QUINCY, MA NETWORK TELECOM EXCHANGE CORP NKTE 4396 EASTON, PA NEVADA BELL NV 9742 RENO, NV NEW BRUNSWICK TEL CO LTD THE NBWK 8090 SAINT JOHN, NB NEW CASTLE TELEPHONE CO NWCS 3029 NEW CASTLE, VA NEW EDGE NETWORK, INC. NENI 2830 VANCOUVER, WA NEW FLORENCE TEL CO INC NWFL 1927 NEW FLORENCE, MO NEW FRONTIERS TELECOMMUNICATIONS, INC. NFTI 4606 HAGERSTOWN, MD NEW HOPE TEL CO NWHP 0239 NEW HOPE, VA NEW HOPE TEL COOP NHPE 0308 NEW HOPE, AL NEW JERSEY BELL TEL CO NJ 9206 NEWARK, NJ NEW KNOXVILLE TEL CO NKVE 0639 NEW KNOXVILLE, OH NEW LINE TELEPHONE AND COMMUNICATIONS NLTC 8694 HINGHAM, MA COMPANY, INC NEW LISBON TEL CO INC NWLS 0796 NEW LISBON, IN NEW LONDON TEL CO NWLN 1928 NEW LONDON, MO NEW MILLENNIUM COMMUNICATIONS CORP NMCC 8774 MIAMI, FL NEW PARIS TEL INC NWPR 0797 NEW PARIS, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–40 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location NEW TELCO, L.P. DBA SPRINT TELECOM. NTST 7483 KANSAS CITY, MO VENTURE NEW ULM TELECOM INC NURL 1442 NEW ULM, MN NEW WINDSOR TEL CO NWWN 1062 NEW WINDSOR, IL NEW WORLD PHONE SERVICE, INC. NEES 8703 NORRISTOWN, PA NEW YORK COIN TELEPHONE CO., INC. NYCT 7958 SAN ANTONIO, TX NEW YORK LOCAL TELEPHONE, INC. NYLT KNOXVILLE, TN NEW YORK TELECONNECT, INC. NYTI 7003 HARRISBURG, PA NEW YORK TELSAVE, INC. NYTL 9263 NEW YORK, NY NEWCOMM NET, INC. NNET FREDERICK, MD NEWFOUNDLAND TEL CO LTD NFLD 8085 ST JOHN’S, NF NEWPORT TEL CO INC NWPT 0107 NEWPORT, NY NEXTGEN TELEPHONE, INC. NXGT MOUNT SINAI, NY NEXTLINK ARIZONA, INC. NXAZ 4793 BELLEVUE, WA NEXTLINK DELAWARE, INC NXDE 4124 WYOMISSING, PA NEXTLINK FLORIDA INC. NXFL 6100 MIAMI, FL NEXTLINK GEORGIA, INC. NXGA 8758 SMYRNA, GA NEXTLINK ILLINOIS, INC. NXIL 7056 OAKBBROOK, IL NEXTLINK MARYLAND, LLC NXMD 4773 WYOMISSING, PA NEXTLINK MASSACHUSETTS, INC NXMA 4536 CAMBRIDGE, MA NEXTLINK MICHIGAN, INC. NXMI 4125 BELLEVUE, WA NEXTLINK MISSOURI, INC. NXMO 4774 BELLEVUE, WA NEXTLINK NEVADA, LLC NXNV 7521 HENDERSON, NV NEXTLINK NEW JERSEY, INC NXNJ 4123 NEWARK, NJ NEXTLINK NEW YORK, L.L.C. NXNY 8340 NEW YORK, NY NEXTLINK OF CALIFORNIA NXCA 7262 SANTA ANA, CA NEXTLINK TEXAS, INC. NXTX 8958 DALLAS, TX NEXTLINK VIRGINIA, LLC NXVA 4772 FAIRFAX, VA NEXTLINK WASHINGTON, L.L.C. NXWA 7340 SPOKANE, WA NEXTLINK, D.C., INC NXDC 8964 WASHINGTON, DC NIAGARA TEL CO NIGR 0920 NIAGARA, WI NICHOLVILLE TEL CO INC NCVL 0108 NICHOLVILLE, NY NJ TEL CO NJSY 0141 NJ NOCONA TEL CO NCNA 2121 TX NODAWAY VALLEY TEL CO NVLY 1929 MO NOONAN FARMERS TEL CO NONN 1623 NOONAN, ND NORCOM, INC. NOMI 4251 BOCA RATON, FL NORFOLK COUNTY INTERNET, INC. NCNI FRANKLIN, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–41 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location NORMAN COUNTY TEL CO INC NRMN 1443 ADA, MN NORTH AMERICAN COMMUNICATIONS NACC NEW YORK, NY CONTROL, INC. NORTH AMERICAN COMMUNICATIONS, INC. NACI WYOMING, PA NORTH AMERICAN TELECOMMUNICATIONS NATL 7206 UNIONDALE, NY NORTH CENTRAL TEL CO NOCT 1256 IA NORTH CENTRAL TEL COOP INC NCTL 0573 LAFAYETTE, TN NORTH COUNTRY TEL CO NCRY 3026 EAGLE, AK NORTH COUNTY COMMUNICATIONS CORP. NCCC 8293 SAN DIEGO, CA NORTH DAKOTA TEL CO NDKT 1447 DEVILS LAKE, ND NORTH EASTERN PENNSYLVANIA TEL CO NEPA 0191 FOREST CITY, PA NORTH ENGLISH COOP TEL CO NENG 1257 NORTH ENGLISH, IA NORTH FLORIDA TEL CO NOFL 0335 FL NORTH FRONTENAC TEL CO NFRC 8225 SHARBOT LAKE, ON NORTH INC - WI GMWI SUN PRARIE, WI NORTH NORWICH MUN TEL SYS NNRW 8226 BURGESSVILLE, ON NORTH PENN TEL CO NOPA 0192 PRATTSBURG, NY NORTH PITTSBURG TEL CO NPBH 0193 GIBSONIA, PA NORTH RENFREW TEL CO LTD NRFW 8227 BEACHBURG, ON NORTH RIVER TEL COOP NTRV 0236 DAYTON, VA NORTH STATE TEL CO NSTE 0491 HIGH POINT, NC NORTH TEXAS TEL CO NTTC 2043 BYERS, TX NORTHEAST FLORIDA TEL CO INC NEFL 0335 MACCLENNY, FL NORTHEAST IOWA TEL CO NEIA 1230 MONONA, IA NORTHEAST LOUISIANA TEL CO INC NELA 0435 COLLINSTON, LA NORTHEAST MISSOURI RURAL TEL CO NEMO 1931 GREEN CITY, MO NORTHEAST NEBRASKA TEL CO NENE 1576 JACKSON, NE NORTHEAST OPTIC NETWORK INC NEON 7333 WESTBOROUGH, MA NORTHEAST TEL CO NRST 0938 PULASKI, WI NORTHEASTERN TEL CO NESN 1577 NE NORTHERN ARKANSAS TEL CO NOAR 1713 FLIPPIN, AR NORTHERN IOWA TEL CO NOIA 1259 SIOUX CENTER, IA NORTHERN STATES POWER CO TEL DEPT NSPR 1624 MINOT, ND NORTHERN TEL CO NOTH 1578 NE NORTHERN TEL CO OF MINNESOTA NORT 1500 WAWINA, MN NORTHERN TEL COOP INC NTRN 2248 SUNBURST, MT NORTHERN TEL LTD NRTN 8228 NEW LISKEARD, ON NORTHFIELD TEL CO NRFD 0061 NORTHFIELD, VT

Proprietary — Licensed Material See proprietary restrictions on title page. 11–42 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location NORTHLAND NETWORKS NLNW 7556 UTICA, NY NORTHLAND TEL CO NRLD 1445 HILL CITY, MN NORTHLAND TELEPHONE OF MAINE, INC. NTOM 3316 PORTLAND, ME NORTH-STATE TEL CO NHST 2388 MT VERNON, OR NORTHWEST COMMUNICATIONS COOP NWCC 1625 RAY, ND NORTHWEST IOWA TEL CO INC NWIA 1260 SARGEANT BLUFF, IA NORTHWEST LOUISIANA TEL CO INC NWLA 0436 MONROE, LA NORTHWEST MUTUAL AID TEL CORP NMAD 1625 ND NORTH-WEST TEL CO NOWS 0922 TOMAH, WI NORTHWEST TEL COOP ASSN NTHW 1261 HAVELOCK, IA NORTHWESTEL INC NRWT 8092 WHITEHORSE, YT NORTHWESTERN BELL NW 9631 OMAHA, NE NORTHWESTERN INDIANA TEL CO INC NWIN 0800 HEBRON, IN NORTHWESTERN TEL SYSTEMS INC NOWE 2249 KALISPELL, MT NORTHWESTERN TEL SYSTEMS INC NWTS 2382 LEBANON, OR NORWAY RURAL TEL CO NRRL 1262 KANAWHA, IA NORWAY TEL CO INC NRWY 0535 NORWAY, SC NOS COMMUNICATIONS INC NOSC 7519 LAS VEGAS, NC NOVA TEL CO NOVA 0644 NOVA, OH NOVUS TELECOM, INC NVST VANCOUVER, BC NOVY’S TEL CO NVYS 0924 KENDALL, WI NOW COMMUNICATIONS, INC. NOWC 7771 JACKSON, MS NOXAPATER TEL CO INC NOXP 0461 LEAKSVILLE, MS NOXAPATER TEL CO INC NXPR 0464 BAY SPRINGS, MS NTCNET TELECOM INC NTCT NEWPORT, NY NTEGRITY TELECONTENT SERVICES, INC. NGIT 8867 BALTIMORE, MD NTEL NTEL 8852 GERMANTOWN, MD NUCLA-NATURITA TEL CO NNRT 2193 NUCLA, CO NUNN TEL CO NUNN 2194 NUNN, CO NUSHAGAK TEL COOP INC NSGK 3018 DILLINGHAM, AK NUSTAR TELEPHONE CO. INC. NSTT ATLANTA, GA NUTEL PHONE SERVICE, INC. NUPS NORRISTOWN, PA OAKMAN TEL CO INC OKMN 0311 LEESBURG, AL OAKWOOD MUTUAL TEL CO OAKW 0645 OAKWOOD, OH OBJECTIVE COMMUNICATIONS, INC OJVC PORTSMOUTH, NH ODIN TEL EXCH INC ODIN 1065 ODIN, IL ODON TEL CO OMTP 0801 ODON, IN O’DONNELL TEL CO INC ODNL TX

Proprietary — Licensed Material See proprietary restrictions on title page. 11–43 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location OGDEN TEL CO ODMM 0714 BISSFIELD, MI OGDEN TEL CO OGDN 1263 OGDEN, IA OGDEN TEL CO OF NEW YORK OGEN 0110 SPENCERPORT, NY OHIO BELL TEL CO OB 9321 CLEVELAND, OH OKLAHOMA ALLTEL INC OKAT 2011 LITTLE ROCK, AR OKLAHOMA COMMUNICATION SYSTEM INC OKCN 1984 CHOCTAW, OK OKLAHOMA STATE TEL CO OKST OK OKLAHOMA TEL & TEL INC OKLH 2013 DUSTIN, OK OKLAHOMA WESTERN TEL CO OKWE 2014 CLAYTON, OK OLIN TEL CO INC OLIN 1264 OLIN, IA OMC COMMUNICATIONS, INC. OMCC BETHESDA, MD ONE VOICE COMMUNICATIONS, INC. OVCI 5124 ASHBURN, VA ONE WAY COMMUNICATIONS, INC. OWYC SOMERS PT, NJ ONEIDA COUNTY RURAL TEL CO OCRL 0111 HOLLAND PATENT, NY ONEIDA TEL EXCH ONED 1066 ONEIDA, IL ONEONTA TEL CO INC ONNT 0312 ONEONTA, AL ONESTAR COMMUNICTIONS, LLC. OSCL 9830 EVANSVILLE, IN ONESTAR LONG DISTANCE, INC OLDI EVANSVILLE, IN ONSITE ACCESS LOCAL LLC OALL 7022 NEW YORK, NY ONSITE ACCESS, LLC ONAC NEW YORK, NY ONSLOW COOP TEL ASSN ONSL 1265 ONSLOW, IA ONTARIO NORTHLAND TRANS COMSN ONCS 8229 NORTH BAY, ON ONTARIO TEL CO INC ONTR 0112 PHELPS, NY ONTONAGON COUNTY TEL CO ONTN 0717 ONTONAGON, MI OOLTEWAH-COLLEGEDALE TEL CO OOCD 0574 CHICKAMAUGA, GA OPENBAND OF VIRGINIA, INC. OBVA 3149 CHANTILLY, VA OPTIMUM GLOBAL COMMUNICATIONS, INC OPGC 8978 SPRINGFIELD, MA ORAN MUTUAL TEL CO ORAN 1266 ORAN, IA ORANGE CITY TEL CO ORCY 0337 FL ORCHARD FARM TEL CO OFRM 1934 ST CHARLES, MO OREGON FARMERS MUTUAL TEL CO ORGE 1935 OREGON, MO OREGON TEL CORP ORGN 2389 MT VERNON, OR OREGON-IDAHO UTILITIES INC ORID 2390 SAN FRANCISCO, CA ORION TEL EXCH ASSN ORIN 1067 ORION, IL ORISKANY FALLS TEL CORP ORFL 0114 ORISKANY FALLS, NY ORWELL TEL CO ORWL 0649 ORWELL, OH OSAKIS TEL CO OSKS 1448 PARKERS PRAIRIE, MN OSWAYO RIVER TEL CO OSWY 0194 SHINGLEHOUSE, PA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–44 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location OTEL TELEKOM, INC. OTEL MANCHESTER, NH OTONABEE TEL LTD OTNB 8230 MILBROOK, ON OTTO TEL CO INC OTTO 0195 BUTLER, PA OTTOVILLE MUTUAL TEL CO OTVL 0650 OTTOVILLE, OH OTZ TEL COOP INC OTZT 3019 KOTZKBUE, AK OUTSIDE CONNECTION, INC. OUTC ROCKVILLE CENTRE, NY OVATION COMMUNICATIONS, INC (PREV OCI OCIC 7908 401 SECOND AVENUE SOUTH, COMM.) MN OWYHEE TEL CO OWYH 2229 ID OXFORD COUNTY TEL & TEL CO OCTY 0019 BUCKFIELD, ME OXFORD COUNTY TELE. SERVICE CO DBA OXNW BUCKFIELD, MA OXFORD NETWORKS PACIFIC BELL PT 9740 SAN FRANCISCO, CA PACIFIC NORTHWEST BELL PN 9638 SEATTLE, WA PACIFIC POWER & LIGNT CO PPLT 2249 MT PACIFIC TELECOM INC PTIC 2360 LEBANON, OR PACLEC CORPORATION PLEC 5630 LEBANON, PA PAETEC COMMUNICATIONS PTEC 4029 FAIRPORT, NY PALMER MUTUAL TEL CO PLMR 1270 PALMER, IA PALMERTON LONG DISTANCE DBA BLUE RIDGE BLRT 4077 PALMERTON, PA TELEPHONE PALMERTON TEL CO PMTN 0196 PALMERTON, PA PALMETTO RURAL TEL COOP INC PLMT 0536 WALTERBORO, SC PALO COOP TEL ASSN PALO 1269 PALO, IA PALO PINTO TEL CO PLPN 2127 TX PANHANDLE TEL COOP INC PHDL 2016 GUYMON, OK PANORA COOP TEL ASSN INC PANR 1271 PANORA, IA PAPAGO TRIBAL UTILITY AUTH. PTUA 2173 SELLS, AZ PAPAGO TRIBAL UTILITY AUTHORITY PUTA 2173 SELLS, AZ PARAMOUNT COMMUNICATIONS INC. PUMI RALEIGH, NC PARK REGION MUTUAL TEL CO PRML 1450 UNDERWOOD, MN PARMA TEL CO PARM 0719 MI PATH ENTERPRISES, INC PATH UNION, NJ PATHNET, INC PTHN WASHINGTON, DC PATTERSONVILLE TEL CO PSVL 0116 ROTTERDAM JUNC, NY PATTERSONVILLE TEL CO PTRV 0651 CARROLLTON, OH PAUL BUNYAN RURAL TEL COOP PBRL 1451 BEMIDJI, MN PAYLEXX UTILITIES & TELEC SERVICES OF PXUT 8686 LONG ISLAND CITY, NY AMERICA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–45 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location PBT COMMUNICATIONS, INC PBTC GILBERT, SC PEACE VALLEY TEL CO PCVY 1936 PEACE VALLEY, MO PEEPLES TEL CO PPLL 2129 SUGAR LAND, TX PEETZ COOP TEL CO PETZ 2196 PEETZ, CO PELICAN TEL CO PLCN 1452 MN PELL-TEL INC. PETL 4766 BLOOMFIELD, NJ PEMBROKE TEL CO INC PMBR 0376 PEMBROKE, GA PEMBROKE TEL COOP PMBK 0243 PEMBROKE, VA PENASCO VALLEY TEL COOP INC PNSC 2270 ARTESIA, NM PENINSULA TEL CO PNSL 0720 TRAVERSE CITY, MI PENINSULA TELECOMMUNICATIONS INC PNUL 2436 FORKS, WA PENN TELECOM, INC PNTM 8596 GIBSONIA, PA PENNSYLVANIA TEL CO PENN 0197 JERSEY SHORE, PA PEOPLES MUTUAL TEL CO PEPL 1814 LA CYGNE, KS PEOPLES MUTUAL TEL CO POPL 0244 GRETNA, VA PEOPLES RURAL TEL COOP CORP PRUL 0415 MCKEE, KY PEOPLES TEL & TEL CO PLES 1672 SD PEOPLES TEL CO PELS 2391 LYONS, OR PEOPLES TEL CO PEOL 1453 BIGFORK, MN PEOPLES TEL CO PEPS 1273 AURELIA, IA PEOPLES TEL CO POLS 0931 RANDOLPH, WI PEOPLES TEL CO (BLOOMINGTON) PEOP 0930 MADISON, WI PEOPLES TEL CO INC PPLS 0576 ERIN, TN PEOPLES TEL CO INC PPLX 0314 LEESBURG, AL PEOPLE’S TEL CO OF FOREST LTD PFST 8231 FOREST, ON PEOPLES TEL COOP POPS 2130 QUITMAN, TX PERCO TEL CO PRCO 1717 PERRYVILLE, AR PERKINSVILLE TEL CO PKSV 0062 PERKINSVILLE, VT PERRY-SPENCER RURAL TEL COOP INC PSRL 0807 ST MEINRAD, IN PETERSBURG TEL CO PTBG 1580 PETERSBURG, NE PHILLIPS COUNTY TEL CO PHLP 2197 HOLYOKE, CO PHOENIX COMMUNICATIONS SOLUTIONS, INC PCSI 4346 WEST NEW YORK, NJ PHOENIX NETWORK, INC. PHNK 7640 GOLDEN, CO PHONE MICHIGAN PHMG GRANDVILLE, MI PHONE RECONNECT OF AMERICA, LLC PRAM PORT ST LUCIE, FL PHONE-LINK, INC PHLK 8601 LAGRANGE, KY PICUS COMMUNICATIONS, LLC (PREV ATLANTIC ATTN 7762 VIRGINIA BEACH, VA TELECOM)

Proprietary — Licensed Material See proprietary restrictions on title page. 11–46 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location PIEDMONT RURAL TEL COOP INC PRRL 0538 LAURENS, SC PIEDMONT TEL MEMBERSHIP CORP PMBP 0497 LEXINGTON, NC PIERCE TEL CO PIRC 1581 PIERCE, NE PIGEON TEL CO PGEN 0721 PIGEON, MI PILGRIM TELEPHONE, INC. PLGT CAMBRIDGE, MA PINE BELT TEL CO INC PBLT 0315 ARLINGTON, AL PINE DRIVE TEL CO PDRV 2198 BEULAH, CO PINE ISLAND TEL CO PNIS 1454 HECTOR, MN PINE TEL CO PINX 2017 BROKEN BOW, OK PINE TEL SYSTEM PINE 2392 HALFWAY, OR PINE TREE TEL & TEL CO PNTR 0020 GRAY, ME PINELAND TEL COOP INC PNLD 0377 METTER, GA PINEVILLE TEL CO PIVL 0494 PINEVILLE, NC PINNACLES TEL CO PNCL 2346 PAICINES, CA PIONEER TEL ASSN INC PIER 1817 ULYSSES, KS PIONEER TEL CO PONR 2437 LA CROSSE, WA PIONEER TEL COOP INC PNER 2018 KINGFISHER, OK PIONEER TEL COOPERATIVE PINR 2393 PHILOMATH, OR PLAIN DEALING TEL CO INC PLDN 0437 MONROE, LA PLAINS COOP TEL ASSN INC PLAN 2199 JOES, CO PLAINVIEW TEL CO INC PLVW 1582 PLAINVIEW, NE PLANT TEL CO PPWR 0379 TIFTON, GA PLANTERS RURAL TEL COOP INC PLNT 0378 NEWINGTON, GA PLATTEVILLE TEL CO DBA PTI COMMUNICATIONS PTVL 0934 PLATTEVILLE, WI PLEASANTON TEL CO PLTN 1818 KS PMC DIRECT CORP PMDC ISLANDIA, NY POKA-LAMBRO TEL COOP INC PLRL 2131 TAHOKA, TX POLAR COMMUN MUTUAL AID CORP POLR 1630 PARK RIVER, ND POND BRANCH TEL CO INC PNBH 0539 GILBERT, SC PONDEROSA TEL CO PNRS 2332 O’NEALS, CA PORT BYRON TEL CO PTBY 0118 PORT BYRON, NY POSEYVILLE TEL CO INC POVL 0809 POSEYVILLE, IN POSTVILLE TEL CO DBA PTI COMMUNICATIONS PVLL 1274 POSTVILLE, IA POTLATCH TEL CO INC PTCH 2230 KENDRICK, ID POTTAWATOMIE TEL CO PTWM 2020 EARLSBORO, OK POWELL TEL CO POWL 0577 TN PRAIRIE GROVE TEL CO PRGV 1718 PRAIRIE GROVE, AR PRAIRIE TEL CO PRAR 1073 CHAMPAIGN, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 11–47 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location PRAIRIE TEL CO INC PRRE 1344 BREDA, IA PRAIRIEBURG TEL CO INC PABG 1275 PARIRIEBURG, IA PRECONNECTION, INC. PRCT ELIZABETH, NJ PREFERRED CARRIER SERVICES PCSS 7676 DALLAS, TX PREFERRED NETWORK SOLUTIONS, INC. PRNS VALLEY STREAM, NY PREMIERE NETWORK SERVICES, INC. PNSI DESOTO, TX PRE-PAID PHONES, LTD PPPL 4884 LAS VEGAS, NV PRESCOTT TEL & TEL CO PRSC 2439 WA PRESTON TEL CO PRES 0266 WV PRESTON TEL CO PSTN 1276 PRESTON, IA PREXAR, LLC PRXR ELLSWORTH, ME PRICE COUNTY TEL CO PCTY 0937 PHILLIPS, WI PRIMELINK, INC. PMLK 6112 CHAMPLAIN, NY PRINCE GEO TEL CO PGRG 0233 VA PRINCE RUPERT CITY TELEPHONES PRRT 8082 PRINCE RUPERT, BC PRINCETON TEL CO OF PRINCETON INDIANA PRTN 0811 IN PRISM COMM. INC (PREV TRANSWIRE TSWC NY, NY COMMUNICATIONS INC PRODESIGN CORP. DBA INTERACTIVE HOME IHSY 8509 CONCORD, MA SYSTEMS PROGRESSIVE RURAL TEL COOP INC PGSS 0380 RENTZ, GA PROJECT MUTUAL TEL COOP ASSN INC PJCT 2231 RUPERT, ID PROJECT TEL CO INC PRJT 2250 SCOBEY, MT PTT NETHERLANDS PTTN 0000 HAGUE, HD PUBLIC SERVICE TEL CO PBUC 0723 MI PUBLIC SERVICE TEL CO PSVC 0381 REYNOLDS, GA PUERTO RICO COMMUNICATIONS CORP PRCA 3200 SAN JUAN, PR PUERTO RICO TEL CO PTRN 3201 SAN JUAN, PR PUGWASH RIVER MUTUAL TEL CO PGWS PUGWASH, NS PULASKI-WHITE RURAL TEL COOP INC PWRL 0813 STAR CITY, IN PVT NETWORKS, INC. PVTN 2662 ARTESIA, NM PYMATUNING INDEP TEL CO PYMT 0200 GREENVILLE, PA QMEDIA, INC. QMDA NEW YORK, NY QTEL, INC. QTEL DALLAS, TX QUAKER STATE TEL CO QAKR 0201 HERSHEY, PA QUALITY TELECOM INC QLTT PLAINVIEW, NY QUALITY TELEPHONE QUAT 1646 DALLAS, TX QUALSTAR COMMUNICATIONS, INC. QLSC DEFIANCE, OH QUANTREX COMMUNICATIONS, INC. QTXC VIRGINIA BEACH, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–48 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location QUANTUM TELECOMMUNICATIONS, INC. QNMT 2596 MANCHESTER, MD QUEBEC-TEL QUBC 8083 RIMOUSKI, PQ QUINCY TEL CO QNCY 0338 QUINCY, FL R & B COMPUTER SYSTEMS, INC. RBCS QUEENS VILLAGE, NY R & B NETWORK, INC. RBNI 7185 DALEVILLE, VA R.T.O. COMMUNICATIONS, LLC. RTOC 9587 NORFOLK, VA RADCLIFFE TEL CO INC RDCL 1277 RADCLIFFE, IA RAGLAND TEL CO INC RGLD 0316 RAGLAND, AL RAINBOW TEL COOP ASSN INC RNBW 1820 EVEREST, KS RANDOLPH TEL CO RNLH 0495 LIBERTY, NC RANDOLPH TEL MEMBERSHIP CORP RMBP 0496 ASHEBORO, NC RAPID COMMUNICATIONS INC. RPDC MORRISTOWN, NJ RC COMMUNICATIONS, INC(SUB ROBERTS RCCI 1662 NEW EFFINGTON, SD COUNTY) RCN LONG DISTANCE COMPANY(PREV CWLD 7614 PRINCETON, NJ COMMONWEALTH LD) RCN TELECOM SERVICES OF ILLINOIS (PREV TWCT 6989 CHICAGO, IL 21ST CEN RCN TELECOM SERVICES OF PHILADELPHIA INC RCNP 8309 PRINCETON, NJ RCN TELECOM SERVICES, INC(PREV RCNK 7618 PRINCETON, NJ RESIDENTIAL COMM) REACH COMMUNICATIONS INC. RCHC 7738 ALBANY, NY READLYN TEL CO RDLY 1278 READLYN, IA REASNOR MUTUAL TEL ASSN RSNR 1279 SULLY, IA RED RIVER RURAL TEL ASSN RDRV 1631 ABERCROMBIE, ND REDFIELD TEL CO INC RDFD 1720 MONROE, LA REDWOOD COUNTY TEL CO RDWD 1472 REDWOOD FALLS, MN REGENT TELECOMMUNICATIONS CORPORATION RGTC KINGSTON, NY REMI RETAIL COMMUNICATIONS, LLC RRCL 9449 GREENSBURG, PA RESERVATION TEL COOP RSVN 1632 PARSHALL, ND RESERVE TEL CO RSRV 0438 RESERVE, LA REVOLUTION NETWORKS LLC(PREV COMMUNITY CSLI 0761 WINTHROP, ME SER... REYNOLDS TEL CO INC RYNL 1075 REYNOLDS, IL RHINELANDER TEL CO RHNL 0940 RHINELANDER, WI RIB LAKE TEL CO RBLK 0941 RHINELANDER, WI RICE BELT TEL CO RBLT 1721 WEINER, AR RICHLAND-GRANT TEL COOP INC RGNT 0942 BLUE RIVER, WI RICHMOND CONNECTIONS, INC. RHMC 2804 RICHMOND, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–49 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location RICHMOND TEL CO RCMD 0037 RICHMOND, MA RICO TEL CO RICO 2201 RICO, CO RIDGE TEL CO INC RIDG 0540 RIDGE SPRING, SC RIDGEVILLE TEL CO RGVL 0654 RIDGEVILLE CORS, OH RIDGEWAY TEL CO INC RGWY 0541 RIDGEWAY, SC RINGGOLD TEL CO RNGL 0382 RINGGOLD, GA RINGGOLD TEL CO INC RNGD 0439 RINGGOLD, LA RINGSTED TEL CO RNGS 1280 RINGSTED, IA RIO VIRGIN TEL CO INC RVGN 2356 MESQUITE, NV RITCHIE TEL CO RCHE 0267 HARRISVILLE, WV RIVER VALLEY TEL COOP RVTC 1189 GRAETTINGER, IA RIVERSIDE TELECOM INC RVSD 0943 MADISON, WI RIVIERA TEL CO INC RVRA 2134 RIVIERA, TX RNK, INC RNKI 7744 SHARON, MA ROANOKE & BOTETOURT TEL CO RBTT 0249 DALEVILLE, VA ROANOKE TEL CO INC RONK 0317 MONROE, LA ROBERTS COUNTY TEL COOP ASSN RBRT 1674 NEW EFFINGTON, SD ROBTEL INC. RBTL EAST ROCHESTER, NY ROCHESTER COMMUNICATIONS INC RCMS NY ROCHESTER TEL CO INC ROCH 0815 ROCHESTER, IN ROCHESTER TEL CORP RCSR 0121 ROCHESTER, NY ROCK COUNTY TEL CO ROCK 1586 BLAIR, NE ROCK DELL TEL CO RKDL 1473 KASSON, MN ROCK HILL TEL CO RCHL 0542 ROCK HILL, SC ROCK PORT TEL CO RCPT 1942 ROCK PORT, MO ROCK RIVER TEL CO RCRV 0943 MADISON, WI ROCKLAND TEL CO RKLD 2232 ROCKLAND, ID ROCKWELL COOP TEL ASSN RCWL 1282 ROCKWELL, IA RODEO TEL INC RMBR 1587 BURWELL, NE ROGGEN TEL COOP CO RGGN 2202 ROGGEN, CO ROMAIN TEL CO INC RMAN 2136 GRANDVIEW, TX RONAN TEL CO RONN 2252 RONAN, MT ROOME TELECOM INC ROTI OR ROOSEVELT COUNTY RURAL TEL COOP INC RSVT 2272 PORTALES, NM ROSE VALLEY TEL CO RSVY 2395 LEBANON, OR ROSEVILLE TEL CO RSVL 2334 ROSEVILLE, CA ROTHSAY TEL CO INC RHSY 1474 ROTHSAY, MN ROXBOROUGH TEL CO LTD RXBO 8232 MOOSE CREEK, ON

Proprietary — Licensed Material See proprietary restrictions on title page. 11–50 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location ROYAL TEL CO ROYL 1283 ROYAL, IA RT COMMUNICATIONS INC RTCM 3410 WORLAND, WY RTC COMMUNICATIONS CORP RTCC ROCHESTER, IN RTI/HALSEY TEL CO RTIH 2375 HALSEY, OR RUNESTONE TEL ASSN RNSN 1475 HOFFMAN, MN RURAL TEL CO RURL 2233 GLEENS FERRY, ID RURAL TEL SERVICE CO INC RSVC 1826 LENORA, KS RUTHVEN TEL EXCH CO RTHV 1284 RUTHVEN, IA RYE TEL CO INC RYET 2203 COLORADO CITY, CO S & A TEL CO INC SATC 1829 ALLEN, KS S & T TEL COOP ASSN STTC 1827 BREWSTER, KS S & W TEL CO INC SWTC 0816 SANDBORN, IN S&T COMMUNICATIONS OF DIGHTON INC. STCD 1742 BREWSTER, KS S.V.G.A.L. INC. SVGA BELLMORE, NY SAC COUNTY MUTUAL TEL CO SACC 1285 ODEBOLT, IA SACO RIVER TEL & TEL CO SACO 0022 BAR MILLS, ME SACRED HEART TEL CO SCHR 1476 CLARA CITY, MN SALEM TEL CO SALM 0417 SALEM, KY SALINA-SPAVINAW TEL CO SSVW 2022 TULSA, OK SALTILLO TEL CO SLTL 0203 PA SALUDA MOUNTAIN TEL CO SMTN 0498 SALUDA, NC SAN CARLOS APACHE TELECOMMUNICATIONS SCAT SAN CARLOS, AZ UTILITY, INC. SAN MARCOS TEL CO INC SNMC 2140 SAN MARCOS, TX SANBORN TEL CO SANB 1478 MN SANBORN TEL COOP SUBN 1676 WOONSOCKET, SD SANCOM, INC. SNCM 0166 WOONSOCKET, SD SAND CREEK TEL CO SNCK 0725 SAND CREEK, MI SANDHILL TEL CO SDHL 0499 MATTHEWS, NC SANDHILL TEL COOP INC SNHL 0546 JEFFERSON, SC SANTA ROSA TEL COOP INC SNRS 2141 VERNON, TX SASKTEL SKWN 8091 REGINA, SK Save for Lois, CLLI Ad Hoc POII SAWTOOTH TELEPHONE, INC. SWTT 0120 MIDVALE, ID SBC ADVANCED SOLUTIONS, INC SBCS SAN ANTONIO, TX SBC TELECOM, INC (PREV SBC NATIONAL, INC) SBCN 2664 SAN ANTONIO, TX SBMS BOSTON SERVICES, INC. SBSI 7844 WESTWOOD, MA SBMS NEW YORK SERVICES, INC. SBMS 7659 ROCHESTER, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 11–51 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location SCANDINAVIA TEL CO SCND 0945 MADISON, WI SCHALLER TEL CO SCHL 1291 SCHALLER, IA SCHUYLER TEL CO SCYR 1079 RUSHVILLE, IL SCHUYLER TEL CO - IA SCWD 1341 WOODWARD, IA SCIO MUTUAL TEL CO SCIO 2397 SCIO, OR SCOTT COUNTY TEL COOP INC SCTT 0248 GATE CITY, VA SCOTT COUNTY TELEPHONE COMPANY SCTC 3031 VALIANT, OK SCOTT RICE TEL CO SRCE 1479 PRIOR LAKE, MN SCRANTON TEL CO SCTN 1294 SCRANTON, IA SEARSBORO TEL CO INC SRBO 1292 SEARSBORO, IA SEGTEL, INC. SEGT HANOVER, NH SENECA TEL CO SENC 1945 SENECA, MO SENECA-GORHAM TEL CORP SGRM 0122 HOLCOMB, NY SERVICE ELECTRIC TELEPHONE, INC. SETI 8320 COPLAY, PA SERVICE TEL CO SRVC 0500 LEESBURG, AL SHARON TEL CO SHRN 1293 HILLS, IA SHARON TEL CO SRON 0946 SHARON, WI SHAWNEE TEL CO SWET 1025 EQUALITY, IL SHELL LAKE TEL CO INC SHLK 0948 SHELL LAKE, WI SHELL ROCK TEL CO SLRK 1295 SHELL ROCK, IA SHENANDOAH TEL CO SHND 0250 EDINBURG, VA SHENTEL COMMUNICATIONS COMPANY SHEN EDINBURG, VA SHERBURNE COUNTY RURAL TEL CO SHBR 1482 BIG LAKE, MN SHERWOOD MUTUAL TEL ASSN INC SHWD 0656 SHERWOOD, OH SHERWOOD TEL CO INC SRWD 0465 MERIGOLD, MS SHIAWASSEE TEL CO SHWS 0726 PERRY, MI SHIDLER TEL CO SDLR 2023 SHIDLER, OK SHOREHAM TEL CO INC SHHM 0064 SHOREHAM, VT SHORTLINE SYSTEMS, INC. SHSY 7912 BALTIMORE, MD SIERRA TEL CO INC SIER 2338 OAKHURST, CA SILVER COMMUNICATIONS INT’T SVRC 6136 SAYREVILLE, NJ SILVER STAR TEL CO INC SLST 2295 FREEDOM, WY, ID SIOUX VALLEY TEL CO SOUX 1677 DELL RAPIDS, SD SIREN TEL CO INC SIRN 0949 SIREN, WI SISKIYOU TEL CO SSKY 2339 FT JONES, CA SITKA TEL CO SITK 3020 AK SKOWHEGAN ONLINE INCORPORATED SKOW SKOWHEGAN, ME SKYLAND TECHNOLOGIES, INC. SKYT 6243 HELENA, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 11–52 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location SKYLINE TEL MEMBERSHIP CORP SKLN 0501 WEST JEFFERSON, NC SKYLINE TELECOM STCM 2283 KAMAS, UT SLEDGE TEL CO INC SLDG 0466 SUNFLOWER, MS SLEEPY EYE TEL CO SLEY 1483 ADA, MN SMALL TOWN ADVANCED COMMUNICATIONS, STAC MARBLE FALLS, TX LLC SMART BUILDING TECHNOLOGIES LTD. SBTL 9250 ISLANDIA, NY SMART CELLULAR AND COMMUNICATIONS, INC. SMCC LAKEWOOD, NJ SMITHVILLE TEL CO INC SMTV 0467 SMITHVILLE, MS SMITHVILLE TEL CO INC SMVL 0818 ELLETTSVILLE, IN SNIP LINK, LLC SNIP BLACKWOOD, NJ SODTOWN TEL CO SDTN 1590 RAVENNA, NE SOGETEL INC SGTL 8237 HICOLET, PQ SOLON SPRINGS TEL CO INC SSPS 0950 MILWAUKEE, MN SOMERSET TEL CO SMRS 0024 NORTH ANSON, ME SOMERSET TEL CO INC SMRT 0951 SOMERSET, WI SOONER STATE TEL CO SSTE 2024 OK SOURIS RIVER TEL COMMUNICATIONS COOP SORV 1634 MINOT, ND SOUTH ARKANSAS TEL CO INC SOAR 1702 HAMPTON, AR SOUTH BRUCE RURAL TEL CO LTD SOBC 8238 TEESWATER, ON SOUTH CANAAN TEL CO SCNN 0204 SOUTH CANAAN, PA SOUTH CAROLINA TEL CORP SOCL 0517 SC SOUTH CENTRAL BELL SC 9419 BIRMINGHAM, AL SOUTH CENTRAL COMMUNICATIONS, INC. SCCI 1094 PRINCETON, MO SOUTH CENTRAL RURAL TEL COOP CORP INC SCTR 0418 GLASGOW, KY SOUTH CENTRAL TEL ASSN INC SCTL 1831 MEDICINE LODGE, KS SOUTH CENTRAL TELCOM, LLC STCT 5620 GLASGOW, KY SOUTH CENTRAL TELECOMM OF KIOWA, INC SCTK 3306 MEDICINE LODGE, KS SOUTH CENTRAL TELEPHONE ASSN INC OKLA SCOK 4463 MEDICINE LODGE, KS SOUTH CENTRAL TELEPHONE ASSN, INC KS SCKS 4462 MEDICINE LODGE, KS SOUTH CENTRAL UTAH TEL ASSN INC SCUT 2286 ESCALANTE, UT SOUTH PARK TELEPHONE COMPANY SPTC 2195 COLORADO CITY, CO SOUTH PLAINS TEL COOP INC SPLN 2143 LUBBOCK, TX SOUTH SLOPE COOP TEL CO INC SSLP 1298 NORWAY, IA SOUTHEAST MISSISSIPPI TEL CO SEMS 0461 LEAKESVILLE, MS SOUTHEAST MISSISSIPPI TEL CO SMST 3301 KNOXVILLE, TN SOUTHEAST NEBRASKA TEL CO SENE 1591 FALLS CITY, NE SOUTHEAST TEL CO OF WISCONSIN INC SOEA 0952 WATERFORD, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 11–53 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location SOUTHEASTERN IND RURAL TEL COOP INC SEIN 0819 DILLSBORO, IN SOUTHERN BELL SB 9417 ATLANTA, GA SOUTHERN KANSAS TEL CO INC SOKS 1833 CLEARWATER, KS SOUTHERN MONTANA TEL CO SOMT 2254 WISDOM, MT SOUTHERN NEW ENGLAND TEL CO SN 9147 NEW HAVEN, CT SOUTHERN TEL CO SUTN 0727 MI SOUTHLAND TEL CO STHD 0318 ATMORE, AL SOUTHWEST ARKANSAS TEL COOP INC SWAR 1724 TEXARKANA, AR SOUTHWEST OKLAHOMA TEL CO SWOK 2025 DUKE, OK SOUTHWEST TEL EXCH INC SOWS 1301 EMERSON, IA SOUTHWEST TEXAS TEL CO SWTX 2135 ROCKSPRINGS, TX SOUTHWESTCO WIRELESS, L.P. SWWL 6399 PHOENIX, AZ SOUTHWESTERN BELL SW 9533 ST LOUIS, MO SOUTHWESTERN TEL CO SWSN 2174 SALOME, AZ SPARTAN COMMUNICATIONS CORP SPRC CAMDEN, NJ SPARTAN DEBT SERVICES CORP SDSC 8319 NORCROSS, GA SPECTRA COMMUNICATIONS GROUP, LLC CTSC 1151 KANSAS CITY, MO SPLITROCK PROPERTIES INC.(SUB SPLITROCK SPKP 1655 GARRETSON, SD TELECOM) SPLITROCK TELECOM COOP INC SPRK 1657 GARRETSON, SD SPRING GROVE COOP TEL CO SPGV 1485 SPRING GROVE, MN SPRING VALLEY TEL CO INC SPVY 0953 SPRING VALLEY, WI SPRINGPORT TEL CO SPPT 0728 SPRINGPORT, MI SPRINGVILLE COOP TEL ASSN INC SPVL 1302 SPRINGVILLE, IA SPRINT COMMUNICATIONS COMPANY, L.P. SPNT 8712 OVERLAND PARK, KS SPRINT LTD (CLONES OWNERSHIP CODE ONLY) SLTD N/A KANSAS CITY, MO SPRINT METROPOLITAN NETWORKS, INC. SMPN 7391 MAITLAND, FL SPRUCE KNOB SENECA ROCKS TEL CO SKSR 0257 RIVERTON, WV ST CROIX TEL CO STCR 0944 NEW RICHMOND, WI ST EPHREM INC TEL DE SEPB 8233 ST EPHREM, PQ ST JOSEPH TEL & TEL CO STJS 0339 PORT ST JOE, FL ST LIBOIRE DE BAGOT INC LE TEL DE SLIB 8234 ST LIBOIRE, PQ ST LONG DISTANCE, INC. SLDE 7054 SARASOTA, FL ST MATTHEWS TEL CO STMT 0543 ST MATTHEWS, SC ST PAUL COOP TEL ASSN STPL 2396 ST PAUL, OR ST STEPHEN TEL CO STST 0544 ST STEPHEN, SC ST VICTOR DE BEAUCE (SVDB) LE TEL DE SVIC 8235 SVDB, PG, CN ST. JOHN TEL CO STJH 2442 ST JOHN, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–54 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location STANDARD TEL CO STDD 0386 CORNELIA, GA STANDISH TEL CO STND 0025 STANDISH, ME STANTON TEL CO INC SNTN 1592 STANTON, NE STAR POWER COMMUNICATIONS, LLC SPWC 8829 PRINCETON, NJ STAR TEL CO INC STAR 0441 MARINGOUIN, LA STAR TEL MEMBERSHIP CORP STRM 0502 CLINTON, NC STARBUCK TEL CO STRB 1487 CLARA CITY, MN STATE LONG DISTANCE TEL CO SLDC 0955 ELKHORN, WI STATE TEL CO STTE 0125 COXSACKIE, NY STATELINE TELECOMMUNICATIONS, INC(SUB- STLT 1117 BISON, SD WEST RIVER) STATEN ISLAND TELECOM, LLC SIBL STATEN ISLAND, NY STATESBORO TEL CO STBO 0387 STATESBORO, GA STAYTON COOP TEL CO STYN 2399 STAYTON, OR STEELVILLE TEL EXCH INC SEVL 1949 STEELVILLE, MO STELLE TEL CO STLL 1092 STELLE, IL STENTOR CANADIAN NETWORK MANAGEMENT TCOM 8093 OTTAWA, ON STERLING TELECOM, INC. STRT HUNTINGTON STATION, NY STI COMMUNICATIONS INC. STIC COSHOCTON, OH STICKDOG TELECOM, INC SKGT 7066 VIENNA, VA STOCKBRIDGE & SHERWOOD TEL CO SSWD 0954 MADISON, WI STOCKHOLM-STRANDBURG TEL CO SSDG 1679 STOCKHOLM, SD STONEHAM COOP TEL CO STHM 2206 STONEHAM, CO STOUTLAND TEL CO STLD 1951 COLUMBIA, MO STRASBURG TEL CO STBG 2207 STRASBURG, CO STRATFORD MUTUAL TEL CO SRFR 1305 STRATFORD, IA SUGAR LAND TEL CO SLND 2147 SUGAR LAND, TX SUGAR VALLEY TEL CO SVLY 0206 LOGANTON, PA SULLIVAN TEL CO SLLV 0957 TOMAH, WI SULLY BUTTES TEL COOP INC SBTS 1680 HIGHMORE, SD SULLY TEL ASSN SLLY 1306 SULLY, IA SUMMIT TEL SMMT 3028 FAIRBANKS, AK SUNFLOWER TEL CO INC SNFL 1835 DODGE CITY, KS SUNMAN TEL CO INC SNMN 0825 SUNMAN, IN SUPERIOR TEL COOP SPRR 1307 SUPERIOR, IA SUPRA TELECOMMUNICATIONS & INFORMATION STIS 6236 MIAMI, FL SYSTEMS INC SURRY TEL MEMBERSHIP CORP SRRY 0503 DOBSON, NC SWAYZEE TEL CO INC SWYZ 0826 SWAYZEE, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–55 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location SWEENEY-OLD OCEAN TEL CO SOON 2148 SUGAR LAND, TX SWEETSER RURAL TEL CO INC SWTS 0827 SWEETSER, IN SWISHER TEL CO SWSH 1304 SWISCHER, IA SYCAMORE TEL CO SYCM 0658 SYCAMORE, OH SYLVAN LAKE TEL CO SYLK 0128 MONROE, NY SYNERGISTIC COMMUNICATIONS SYGC 7869 KING OF PRUSSIA, PA TABLE TOP TELEPHONE COMPANY TTTC 3334 AJO, AZ TACONIC TEL CORP TCNC 0084 CHATHAM, NY TALK TIME COMMUNICATIONS LTD TTCM 8490 JAMAICA, NY TALK.COM HOLDING CORP TLHC NEW HOPE, PA TALKINGNETS HOLDINGS, LLC. TLNH 1757 WILMINGTON, NC TATUM TEL CO TATM 2150 TATUM, TX TAYLOR TEL CO LTD TLOR LIONS HEAD, ON TAYLOR TEL COOP INC TAYL 2151 MERKEL, TX TCT WEST, INC. TCTW 3411 BASIN, WY TDS METROCOM, INC MTCM 7804 MADISON, WI TDS TELECOMMUNICATIONS, INC. TDST MADISON, WI TECH VALLEY COMMUNICATIONS, INC TCVC ALBANY, NY TEL SERVICE CO TSVC 0659 WAPAKONETA, OH TEL UTILITIES CO OF OREGON TUOR 2361 LEBANON, OR TEL UTILITIES OF ALASKA INC TUAK 3022 ANCHORAGE, AK TEL UTILITIES OF EASTERN OREGON INC TUEA 2360 LEBANON, OR TEL UTILITIES OF THE NORTHLAND TUND 3030 ANCHORAGE, AK TEL UTILITIES OF WASHINGTON INC TUDC 2408 CHENEY, WA TELABILITY INC. TEBY 8464 EAST ISLIP, NY TELEBEAM TELEPHONE SYSTEMS, INC. BEAM LIC, NY TELEBEAM, INCORPORATED TLBM STATE COLLEGE, PA TELEBEC LIMITEE TLBC 8239 MONTREAL, PQ TELECARD INTERNATIONAL, INC. TEII JACKSON HEIGHTS, NY TELECARRIER SERVICES INC TCSV CRANFORD, NJ TELECOM FUNDING, INC. TELF LAS VEGAS, NV TELECOM ITALIA SPA SIET ROME, IT TELECOM ITALIA SPA SIPT ROME, IT TELECON COMMUNICATIONS CORPORATION TCON 7748 JOHNSTOWN, NY TELEFONICA NACIONAL TFNA COAHUILA, MX TELEFONICA NACIONAL DE ESPANA TFES MADRID, SP TELEFONO NORTE LOGO TLNR TIJUANA,BAJA CA, MX TELEFONOS DE MEXICO TFMX MEXICO CITY, MX

Proprietary — Licensed Material See proprietary restrictions on title page. 11–56 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location TELEFONOS DEL NOROESTE TFNO TIJUANA,BAJA CA, MX TELEMAX INTERNATIONAL CORP. TMAX BROOKLYN, NY TELENERGY TLNY NEWTON, MA TELEPHONE COMPANY OF CENTRAL FLORIDA, TCCF 5295 LAKE MARY, FL INC. TELEPHONE USA OF WISCONSIN, LLC. CTUS 1155 LA CROSSE, WI TELEPHONE UTILITIES OF WEST VA INC TUWV 0271 WV TELEPHONE UTILITIES OF WYOMING INC TUWY 2299 VANCOUVER,WA., WY TELEPORT COMMUNICATIONS GROUP INC. TCGI 7125 STATEN ISLAND, NY TELERGY JOINT VENTURE TLJV 7005 SYRACUSE, NY TELESAT CANADA TSAT 8049 GLOUCESTER, ON TELESENS COMMUNICATIONS CORP. TECO UNIONDALE, NY TELESOFT SPA TLIT VIA DEGLI AGROSTEMMI 30 0, TELIGENT SERVICES, INC. (PREV TELIGENT, INC ) TLGT 8387 VIENNA, VA TELJET, INC. TJET ST. JOHNSBURY, VT TELLICO TEL CO INC TLCO 0578 TELLICO PLAINS, TN TELLOGIC INCORPORATED TGIC DALLAS, TX TEMPLETON TEL CO TMTN 1308 TEMPLETON, IA TENINO TEL CO TENN 2446 TENINO, WA TENNESSEE TEL CO TNNS 0575 KNOXVILLE, TN TENNEY TEL CO TNNY 0958 ALMA, WI TERRA NOVA TELECOM INC TRNV GANDER, NF TERRAL TEL CO TRRL 2029 TERRAL, OK TERRANET, INC. TRRN BOSTON, MA TERRIL TEL CO TRIL 1309 TERRIL, IA TETON TELECOM COMMUNICATIONS TOTC 2204 FREEDOM, WY TEXAS - ALLTEL INC TXMD 2153 GRANDVIEW, TX THACKER/GRIGSBY TEL CO TGBY 0419 HINDMAN, KY THE FURST GROUP, INC. TFGI SHAMONG, NJ THE GERSON GROUP, INC GEGI BOSTON, MA THE NORTH DAKOTA PHONE COMPANY INC NDTC 1447 THE TELEPHONE CONNECTION LOCAL TTLS 8491 LOS ANGELES, CA SERVICES, LLC. THOMASTON TEL CO THMT 0388 GA THORN COMMUNICATIONS, LLC THRN NEW YORK, NY THORNTOWN TEL CO INC THTW 0828 THORNTOWN, IN THORP TEL CO DBA PTI COMMUNICATIONS THRP 0959 THORP, WI THOUSAND ISLANDS COMMUNICATIONS TICC 3224 CLAYTON, NY COMPANY

Proprietary — Licensed Material See proprietary restrictions on title page. 11–57 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location THREE RIVER TEL CO THRV 1525 LYNCH, NE THUNDER BAY THE CITY OF TDBY 8094 THUNDER BAY, ON TIDALWAVE TELEPHONE INC TDWT CHANTILLY, VA TIDEWATER TELECOM, INC. TWTT 3311 NOBLEBORO, MN TIE/COMMUNICATIONS TIEC 7872 OVERLAND PARK, KS TIME WARNER COMMUNICATIONS TWCS 7430 ENGLEWOOD, CO TIPTON TEL CO INC TPTN 0829 TIPTON, IN TITONKA TEL CO TTNK 1310 TITONKA, IA TMC COMMUNICATIONS OF DELEWARE, INC. TMDE BETHESDA, MD TMC OF VIRGINIA, INC. TMCV BETHESDA, MD TOHONO O’ODHAM UTILITY AUTHORITY TOUA 2173 SELLS, AZ TOLEDO TEL CO INC TOLD 2447 TOLEDO, WA TONICA TEL CO TONC 1086 TONICA, IL TOPP COMM, INC TOPP MIAMI, FL TOPSHAM TEL CO TPHM 0068 EAST CORINTH, VT TOTAH TEL CO INC TTAH 2030 OCHELATA, OK TOTAL COMMUNICATIONS PLUS, INC. TTCP BROOKLYN, NY TOTALINK OF INDIANA, LLC TLIN FRANKLIN, MA TOTALINK OF MASSACHUSETTS, LLC. TLMA FRANKLIN, MA TOTALINK OF MICHIGAN, LLC. TLMI FRANKLIN, MA TOTALINK OF OHIO, LLC TLOH FRANKLIN, MA TOWNSHIP TEL CO INC TNSP 0129 CHAUMONT, NY TRANSACTION NETWORK SERVICES, INC(PREV TNWS RESTON, VA PSINET ...) TRANS-CASCADES TEL CO TNCD 2378 ESTACADA, OR TRAVELERS TELECOM CORPORATION TRTL 8311 NJ TRENTON TEL CO TREN 0389 TRENTON, GA TRIANGLE TEL COOP ASSN INC TRNG 2257 HAVRE, MT TRI-COUNTY MUTUAL TEL CO TCML 1682 EMERY, SD TRI-COUNTY TEL ASSN INC TRCY 2296 BASIN, WY TRI-COUNTY TEL ASSN INC TRIC 1839 COUNCIL GROVE, KS TRI-COUNTY TEL CO INC TCNT 0830 NEW RICHMOND, IN TRI-COUNTY TEL CO INC TCTY 2155 HUNTSVILLE, TX TRI-COUNTY TEL CO INC TCUY 1726 EVERTON, AR TRI-COUNTY TEL COOP INC TCNY 0960 STRUM, WI TRI-COUNTY TEL MEMBERSHIP CORP TCMP 0505 BELHAVEN, NC TRINITY VALLEY TEL CO INC TRNY 2156 WINNIE, TX TRISTATE BELL INC TSBI BROOKLYN, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 11–58 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location TROY TEL CO INC TROY 2234 TROY, ID TRUCOM CORPORATION TUCM 8328 NEW YORK, NY TRUMANSBURG HOME TEL CO TMBG 0131 PHELPS, NY TSUNAMI NETWORKS, INC. TUMW NEW YORK, NY TUCKERSMITH MUNICIPAL TEL SYS TMTS 8240 BAYFIELD, ON TULAROSA BASIN TELEPHONE CO.,INC. TRBS 2265 TULAROSA, NM TURTLE LAKE TEL CO DBA PTI TRLK 0961 TURTLE LAKE, WI COMMUNICATIONS TWC COMMUNICATIONS INC. TWCC EDISON, NJ TWIN LAKES TEL COOP CORP TWLK 0579 GAINSBORO, TN TWIN VALLEY TEL INC TWVY 1840 MILTONVALE, KS TWIN VALLEY-ULEN TEL CO INC TVLN 1491 TWIN VALLEY, MN TWINING TEL CO TWNG 0731 MI TXU COMMUNICATIONS COMPANY TXUC LUFKIN, TX TYGART VALLEY TEL CO TYGT 0272 PA U S WEST COMMUNICATIONS INC USWC 9639 MINNEAPOLIS, MN U.S. DATA HIGHWAY CORPORATION UDHC PLEASANTON, CA U.S. LONG DISTANCE, INC. USLD 7575 SAN ANTONIO, TX UINTAH BASIN TEL ASSN INC UBSN 2287 ROOSEVELT, UT ULTIMATE HOME TELEPHONE SERVICE UHTS 8868 EAST ORANGE, NJ UNDIAL INCORPORATED UNDL 7617 LOUISVILLE, KY UNION RIVER TEL CO URVR 0027 AURORA, ME UNION SPRINGS TEL CO INC UNSP 0322 UNION SPRINGS, AL UNION TEL CO UINN 0049 FARMINGTON, NH UNION TEL CO UION 1684 HARTFORD, SD UNION TEL CO UNAN 1593 NE UNION TEL CO UNNN 2297 MOUNTAIN VIEW, UT UNION TEL CO UONN 0962 PLAINFIELD, WI UNION TEL CO INC UNON 1727 MONROE, LA UNIONTOWN TEL CO UNTW 0420 KY UNITED - SUSSEX TEL CO USSX 0139 NJ UNITED FARMERS TEL CO UDFM 1316 EVERLY, IA UNITED INTER MOUNTAIN TEL CO UIMN 0567 BRISTOL, TN UNITED STATES TELECOM ASSOCIATION (PREV USTA WASHINGTON, DC UNITED S.. UNITED STATES TELECOMMUNICATIONS, INC. USTI 8631 TAMPA, FL UNITED SYSTEMS ACCESS TELECOM, INC. UYAT 9298 KENNEBUNK, ME UNITED TEL ASSN INC UNTD 1841 DODGE CITY, KS UNITED TEL CO INC UNID 0581 CHAPEL HILL, TN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–59 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location UNITED TEL CO INC UTED 2158 TX UNITED TEL CO OF ARKANSAS UDAR 1728 OVERLAND PARK, KS UNITED TEL CO OF FLORIDA UFLG 0341 APOPKA, FL UNITED TEL CO OF INDIANA INC UDIN 0832 WARSAW, IN UNITED TEL CO OF KANSAS UDKS 1842 OVERLAND PARK, KS UNITED TEL CO OF LOUISIANA INC UDLA 0443 MONROE, LA UNITED TEL CO OF MICHIGAN UITD MI UNITED TEL CO OF MINNESOTA UDMN 1456 OVERLAND PARK, KS UNITED TEL CO OF MISSOURI UDMO 1957 OVERLAND PARK, KS UNITED TEL CO OF NEW JERSEY UTNJ 0138 CARLISLE, PA UNITED TEL CO OF NJ UDNJ 0142 NJ UNITED TEL CO OF OHIO UDOH 0661 MANSFIELD, OH UNITED TEL CO OF PENNSYLVANIA UDPA 0209 CARLISLE, PA UNITED TEL CO OF TEXAS UDTX 2084 OVERLAND PARK, KS UNITED TEL CO OF THE CAROLINAS UCLS 0506 GREENWOOD, SC UNITED TEL CO OF THE NORTHWEST UDNW 2400 HOOD RIVER, OR UNITED TEL CO OF THE WEST UDWE 1595 OVERLAND PARK, KS UNITED TEL IOWA DBA UNITED TEL E KS UDIA 1317 OVERLAND PARK, KS UNITED TEL IOWA DBA UNITED TEL E KS UTEK 1810 OVERLAND PARK, KS UNITED TEL MO DBA UNITED TEL SE KS UTSK 1812 OVERLAND PARK, KS UNITED TEL MUTUAL AID CORP UMAD 1636 LANGDON, ND UNITED TELECOM, LLC UNTC 6113 GREAT NECK, NY UNITED TELEMANAGEMENT SERVICES UNTS 7491 NEW YORK, NY UNITED TELEPHONE - SOUTHEAST UTSE 0567 BRISTOL, TN UNITED TELEQUIPMENT CORP UNED 0963 MONROE, WI UNITED UTILITIES INC UUTS 3023 ANCHORAGE, AK UNITEL COMMUNICATIONS INC UNTL TORONTO, ON UNITY TEL CO INC UNTY 0029 UNITY, ME UNIVERSAL ACCESS, INC. UNAC CHICAGO, IL UNIVERSAL LONG DISTANCE, INC. UVLD 7622 NEW YORK, NY UNIVERSAL TEL CO OF COLORADO ULCO 2208 PAGOSA SPRINGS, CO UNIVERSAL TEL CO OF NO. WISC. INC UNWI 0956 MILWAUKEE, WI UNIVERSAL TEL CO OF SOUTHWEST (AZ) ULSW 2175 MILWAUKEE, WI UNIVERSAL TEL CO OF SOUTHWEST(NM) UNNM 2274 ZUNI, NM UNIVERSAL TELEPHONE & TELEGRAPH, INC. UTTI 7655 KINNELON, NJ UNLIMITED COMMUNICATIONS SERVICE LLC UNCS TRENTON, NJ UPPER PENINSULA TEL CO UPNA 0732 CARNEY, MI UPSALA COOP TEL ASSN UPSL 1494 UPSALA, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–60 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location UPSTATE HOMETEL, L.L.C. UPHT 4031 DALLAS, TX UPTON INC LA CIE DE TEL STVC 8241 UPTON, PQ URBAN COMMUNICATIONS TRANSPORT UCTC NEW YORK, NY CORPORATION URBAN MEDIA UMDA PALO ALO, CA URBAN TEL CORP URBN 0964 CLINTONVILLE, WI US CARRIER TELECOM, LLC USCT 4931 MERCER UNIVERSITY DR, GA US DATANET CORPORATION UDAC 4079 SYRACUSE, NY US LEC OF NORTH CAROLINA LLC UHCL 7674 CHARLOTTE, NC US ONE COMMUNICATIONS SERVICES CORP. USOC 7461 DALLAS, TX US WATS, INC USWT 4137 BENSALEM, PA US WEST INTERPRISE AMERICA, INC. UWIA 8265 DENVER, CO US XCHANGE, L.L.C. USXC 7980 GRAND RAPIDS, MI USA EXCHANGE, LLC USAX 7761 CHESTERFIELD, MO USA TELEPHONE INC USAT 6110 MIAMI, FL USBG, INC. USBG ALSIP, IL USE EC CODE ADNY MSTT 0160 JAMESTOWN, NY USE EC CODE ADNY WSFR 0213 JAMESTOWN, NY USE EC CODE CZUC CLWV 4338 BLUEFIELD, WV USE EC CODE CZUC CPNL 3402 ELK GROVE, CA USE EC CODE CZUC CTCI 4427 MCCALL, ID USE EC CODE CZUC CTCT 4336 COOKEVILLE, TN USE EC CODE CZUC CTCU 4429 MOAB, UT USE EC CODE CZUC CTMN 4322 LIBBY, MT USE EC CODE CZUC CTNE PLANO, TX USE EC CODE CZUC CTZT 3401 CAVE JUNCTION, OR USE EC CODE CZUC CTZU 2172 KINGMAN, AZ USE EC CODE CZUC CUCA 2308 ELK GROVE, CA USE EC CODE CZUC CUNY 0096 JOHNSTOWN, NY USE EC CODE CZUC CZIL PLANO, TX USE EC CODE CZUC MTNS 0270 HUNDREDWN, WV USE EC CODE CZUC NAVJ 4449 ST MICHAELS, AZ USE EC CODE CZUC NEVD 2354 ELKO, NV USE EC CODE CZUC TLMN 2342 TUOLUMNE, CA USE EC CODE CZUC ADTN 0577 POWELL, TN USE EC CODE CZUC CLWT 4426 SHOWLOW, AZ UTAH-WYOMING TELECOM (UT) UTWY 2288 KAMAS, UT UTELCO, INC UTLC 0963 MONROE, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 11–61 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location UTELWICO INC UTWC 0390 GA UTEX COMMUNICATIONS CORP. UTEX 0821 AUSTIN, TX UTILI SAVE, LLC USAV FOREST HILLS, NY UTILITY SOLUTIONS UYOO ROCHESTER, NY VALCOURT ASSN COOP DE TEL DE VLCT 8242 VALCOURT, PQ VALDERS TEL CO VLDR 0965 VALDERS, WI VALLEY CABLE & SATELLITE COM. INC(SUB- VCSC 1665 HERREID, SD VALLEY TELE) VALLEY RURAL TEL COOP ASSN INC VRRL 2258 GLASGOW, MT VALLEY TEL CO VALY 1495 PARKERS PRAIRIE, MN VALLEY TEL CO VLEY 2298 BAGGS, WY VALLEY TEL CO INC VALE 0324 LEEDS, AL VALLEY TEL COOP INC VVLE 2176 WILLCOX, AZ VALLEY TEL COOP INC VVLY 2159 RAYMONDVILLE, TX VALLEY TELECOM COOP ASSN INC VLLE 1685 HERREID, SD VALLEY TELECOMMUNCIATIONS, INC VLLY 3309 SCOBEY, MT VALLEY TELECOMMUNICATIONS COMPANY VLTC WILLCOX, AZ VALLEY VIEW TEL CO VVEW 2160 MUENSTER, TX VALLIANT TEL CO VLNT 2032 VALLIANT, OK VALOR TELECOMMUNICATIONS SOUTHWEST, VLTS IRVING, TX LLC VAN BUREN TEL CO INC VNBR 1319 KEOSAUQUA, IA VAN HORNE COOP TEL CO VNHR 1320 VAN HORNE, IA VANLUE TEL CO VANL 0662 VANLUE, OH VARTEC TELECOM, INC. VRTT 5167 DALLAS, TX VAST-TEL COMMUNICATIONS, INC VTTC BRIDGEPORT, TX VAUGHNSVILLE TEL CO INC VGVL 0663 VAUGHNSVILLE, OH VCOM.COM CORP VCOM NEW YORK, NY VDL INC. DBA GLOBAL TELECOM BROKERS VGTB 8346 OWINGS MILLS, MD VENTURA TEL CO INC VNTR 1322 VENTURA, IA VENTURE COMMUNICATIONS, INC(SUB SULLY VNRC 0164 HIGHMORE, SD BUTTES) VENUS TEL CORP VENS 0210 VENUS, PA VERIZON CALIFORNIA INC (PREV GTE GTCA 2319 THOUSAND OAKS, CA CALIFORNIA) VERIZON DELAWARE, INC. (PREV BELL DS 9210 PHILADELPHIA, PA ATLANTIC-DEL,INC VERIZON FLORIDA INC (PREV GTE FLORIDA INC) GTFL 0328 TAMPA, FL VERIZON HAWAII INC (PREV GTE HAWAIIAN TEL HTCO 3100 HONOLULU, HI CO INC)

Proprietary — Licensed Material See proprietary restrictions on title page. 11–62 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location VERIZON MARYLAND INC (PREV BELL ATLANTIC- CM 9212 BALTIMORE, MD MD,INC) VERIZON NEW ENGLAND (PREV NEW ENGLAND NE 9102 BOSTON, MA TEL & TEL CO VERIZON NEW YORK INC (PREV NEW YORK TEL NY 9104 NEW YORK, NY CO) VERIZON NORTH INC (IL) (PREV GTE NORTH INC GMIL 1015 .OOMINGTON, IL - IL) VERIZON NORTH INC (IN) (PREV GTE NORTH INC GMIN 0772 FORT WAYNE, IN - IN) VERIZON NORTH INC (MI) (PREV GTE NORTH INC GMMI 0695 MUSKEGON, MI - MI) VERIZON NORTH INC (OH) (PREV GTE NORTH INC GMOH 0615 MARION, OH - OH) VERIZON NORTH INC (PA) (PREV GTE NORTH INC GMPA 0169 ERIE, PA - PA) VERIZON NORTH INC (PREV GTE NORTH) GMMW 4313 GRINNELL, IA VERIZON NORTHWEST INC (PREV GTE GTNW 2416 EVERETT, WA NORTHWEST INC) VERIZON PENNSYLVANIA INC (PREV BELL PA 9208 PHILADELPHIA, PA ATLANTIC PA) VERIZON SELECT SERVICES INC (PREV GTE CARD GTER 7646 IRVING, TX ....) VERIZON SOUTH INC (PREV GTE SOUTH INC) GTSE 0479 DURHAM, NC VERIZON VIRGINIA INC (PREV BELL ATLANTIC- CV 9213 RICHMOND, VA VA,INC) VERIZON WASHINGTON DC INC (PREV BELL CD 9211 ASHINGTON, DC ATLANTIC-WAS VERIZON WEST VIRGINIA INC (PREV BELL CW 9214 CHARLESTON, WV ATLANTIC-WVA, VERMONT TELEPHONE COMPANY, INC. VRMT 3332 SPRINGFIELD, VT VERNON TEL CO INC VERN 0133 VERNON, NY VERNON TEL COOP VRNN 0966 WESTBY, WI VF COMMUNICATIONS, iNC. VFCI NORFOLK, VA VIATEL GLOBAL COMMUNICATIONS INC VLGC 200 COTTONTAIL LANE, SOME, NJ VIC-RMTS-DC, L.L.C. VRDC BANNOCKBURN, IL VILLISCA FARMERS TEL CO VLSC 1324 VILLISCA, IA VIOLA HOME TEL CO VIOL 1087 VIOLA, IL VIRGIN ISLANDS TELEPHONE CORP VNIS 3300 ST THOMAS, VI VIRGINIA TEL CO VHSS 0253 HOT SPRINGS, VA VIROQUA TEL CO VIRQ 0967 VIROQUA, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 11–63 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location VISTA INTERNATIONAL COMMUNICATIONS, INC. VSIC 7806 MT. ARLINGTON, NJ VISTA TELEPHONE COMPANY OF IOWA VIST 1127 FORT DODGE, IA VISTA TELEPHONE COMPANY OF MINNESOTA VSTA 1367 BURNSVILLE, MN VISTA-UNITED TELECOMMUNICATIONS SYS VSUD 0330 LAKE BUENA VISTA, FL VITCOM CORPORATION VTCM NEW YORK, NY VITTS VITS 7990 MANCHESTER, NH VIVIAN TEL CO VIVN 1686 VIVIAN, SD VOICETEL COMMUNICATIONS INC. VCTC WEST ORANGE, NJ VOLCANO TEL CO VOLC 2343 PINE GROVE, CA WABASH MUTUAL TEL CO WMTL 0664 CELINA, OH WABASH TEL COOP INC WBSH 1088 LOUISVILLE, IL WADESVILLE TEL CO INC WSVC 0833 WADESVILLE, IN WAITSFIELD/FAYSTON TEL CO WFSN 0069 WAITSFIELD, VT WALDRON TEL CO WDRN 0734 WALDRON, MI WALKER COUNTY TEL CO WLKR 0391 LAFAYETTE, GA WALLINGFORD TEL COOP WLFR 1325 IA WALNUT HILL TEL CO WLHL 1729 LEWISVILLE, AR WALNUT TEL CO WLNT 1326 WALNUT, IA WAMEGO TEL CO INC WAMG 1845 WAMEGO, KS WANTEL, INC. WNTL 3531 ROSEBURG, OR WAR TEL CO WART 0276 BAY SPRINGS, MS WARREN TEL CO WARN 0031 WARREN, ME WARREN TEL CO WRRN 2162 TX WARWICK LA CIE DE TEL DE WRWK 8243 WARWICK, PQ WARWICK VALLEY TEL CO WWKV 4967 WARWICK, NY WASHINGTON COUNTY RURAL TEL COOP INC WHCR 0834 PEKIN, IN WATERWOOD COMMUNICATIONS INC WRWD 2163 HUNTSVILLE, TX WAUNAKEE TEL CO WAUN 0968 MADISON, WI WAUNETA TELEPHONE COMPANY, DBA WANT 1597 WAUNETA, NE BWTELCOM WAVERLY HALL TEL CO INC WVRL 0392 WAVERLY HALL, GA WAYSIDE TEL CO WYSD 0970 GREENLEAF, WI WE CONNECT COMMUNICATIONS, INC. WECC PITTSBURGH, PA WEBB-DICKENS TEL CORP WDNS 1327 SLOUX CENTER, IA WEBSTER COUNTY TEL CO WBST 1963 MO WEBSTER-CALHOUN COOP TEL ASSN WCLN 1328 GOWRIE, IA WELLMAN COOP TEL ASSN WLMN 1329 WELLMAN, IA WESICO TEL CO WSCO 0508 NC

Proprietary — Licensed Material See proprietary restrictions on title page. 11–64 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location WEST BRANCH TEL CO WBRN 1330 IA WEST CAROLINA COMMUNICATIONS, LLC. WCCL 5872 ABBEVILLE, SC WEST CAROLINA RURAL TEL COOP INC WECR 0550 ABBEVILLE, SC WEST CENTRAL TEL ASSN WCTL 1501 SEBEKA, MN WEST COAST TEL CO OF CALIFORNIA WECT 2344 EVERETT, WA WEST IOWA TEL CO WSIA 1331 REMSEN, IA WEST JERSEY TEL CO WJRS 0143 NJ WEST KENTUCKY RURAL TEL WEKY 0421 MAYFIELD, KY WEST LIBERTY TEL CO WLBT 1332 WEST LIBERTY, IA WEST PENOBSCOT TEL & TEL CO WPTH 0034 CORINNA, ME WEST POINT TEL CO INC WSPN 0837 WEST POINT, IN WEST RIVER COOP TEL CO WSRV 1689 BISON, SD WEST RIVER MUTUAL AID TEL CORP WRMA 1637 HAZEN, ND WEST RIVER TELECOMMUNICATIONS COOP WRTC 1637 HAZEN, ND WEST SIDE TEL CO WSDE 0277 MORGANTOWN, WV WEST TENNESSEE TEL CO INC WETN 0583 BRADFORD, TN WEST TEXAS RURAL TEL COOP INC WETX 2166 HEREFORD, TX WEST VIRGINIA TEL CO WEVA 0278 WV WEST WISCONSIN TEL COOP INC WEWI 0971 DOWNSVILLE, WI WEST WISCONSIN TELECOM COOP INC WWTC 0971 DOWNSVILLE, WI WESTCOAST ASSOCIATES INC WCTA 8788 RAHWAY, NJ WESTEL, INC. WSTL 0117 ALBION, ID WESTELCOM NETWORK, INC. WSMN WESTPORT, NY WESTERN CAROLINA TEL CO WECN 0509 NC WESTERN COUNTIES TEL CORP WCTS 0136 NY WESTERN IOWA TEL ASSN WEIA 1334 LAWTON, IA WESTERN NEW MEXICO TEL CO INC WNNM 2268 SLIVER CITY, NM WESTERN RESERVE TEL CO WRSE 0666 HUDSON, OH WESTERN TEL CO WSTR 1502 SPRINGFIELD, MN WESTERN TEL CO WTRN 1688 FAULKTON, SD WESTERN WAHKIAKUM COUNTY TEL CO WWCY 2451 GRAYS RIVER, WA WES-TEX TELEPHONE COOP INC WTXS 2168 STANTON, TX WESTPHALIA TEL CO WPHL 0735 WESTPHALIA, MI WESTPORT TEL CO WSPT 8244 WESTPORT, ON WESTSIDE INDEP TEL CO WSSD 1335 WESTSIDE, IA WHEAT STATE TEL CO INC WSTE 1847 UDALL, KS WHEELING TEL EXCH WLNG 1964 BRECKENRIDGE, MO WHIDBEY TEL CO WHBY 2452 LANGLEY, WA

Proprietary — Licensed Material See proprietary restrictions on title page. 11–65 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location WHITTIER TEL CO WHTR 3024 AK WICKES TEL CO INC WCKS 1732 OK WIGGINS TEL ASSN WGNS 2209 WIGGINS, CO WIGHTMAN TEL LTD WTHM 8245 CLIFFORD, ON WIKSTROM TEL CO INC WKRM 1505 KARLSTAD, MN WILKES TEL & ELEC CO INC WELC 0394 WASHINGTON, GA WILKES TEL MEMBERSHIP CORP WMBP 0510 WILKESBORO, NC WILKINSON COUNTY TEL CO INC WKSN 0395 IRWINTON, GA WILLARD TELEPHONE CO WLRD 2210 MERINO, CO WILLIAMS LOCAL NETWORK, INC. WLNI TULSA, OK WILLISTON TEL CO WLST 0551 WILLISTON, SC WILSON TEL CO INC WLSN 1849 WILSON, KS WILTON TEL CO WLTN 1336 WILTON, IA WILTON TEL CO WLTO 0050 WILTON, NH WINDKEEPER COMMUNICATIONS, INC. WDKP 6915 VIENA, VA WINN TEL CO WINN 0737 WINN, MI WINNEBAGO COOP TEL ASSN WNNB 1337 LAKE MILLS, IA WINSTAR TELECOMMUNICATIONS, INC. WSTI 7542 TYSONS CORNER, VA WINSTED TEL CO WNST 1507 WINSTED, MN WINTER PARK TEL CO WNPK 0343 FL WINTERHAVEN TELEPHONE COMPANY WNTV 2323 ANDERSON, CA WINTHROP TEL CO WNTH 1508 FRANKLIN, MN WIRELESS ACCESS NETWORK, INC. WANI FORT MYERS, FL WISCONSIN BELL WT 9327 MILWAWKEE, WI WISCONSIN INDEPENDENT NETWORK, LLC. WINL EAU CLAIRE, WI WISE COUNTY TEL CO WISE 2051 TX WITTENBERG TEL CO WTNB 0973 WITTENBERG, WI WOLVERINE TEL CO WLVR 0738 MILLINGTON, MI WOLVERTON TEL CO WVTN 1509 WOLVERTON, MN WOOD COUNTY TEL CO WDCY 0974 WISCONSIN RAPIDS, WI WOODBURY TEL CO WDBY 2454 WOODBURY, CT WOODHULL COMMUNITY TEL CO WDHU 1091 WOODHULL, IL WOODSTOCK TEL CO WDST 1510 FRANKLIN, MN WOODWARD MUTUAL TEL CO WDWR 1341 IA WOOLSTOCK MUTUAL TEL ASSN WLSK 1342 WOOLSTOCK, IA WORKING ASSETS WKAS 7493 SAN FRANCISCO, CA WORLD NETWORK INTERNATIONAL SERVICES, WNIS 7863 PLAINVIEW, NY INC.

Proprietary — Licensed Material See proprietary restrictions on title page. 11–66 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Name

Table 11-1 Exchange Carrier Codes Sorted by Company Name (Continued)

Company Name Alpha Numeric Headquarters Location WORLD WIDE TELE-TRANS COMPANY WWTT BENTONVILLE, AR WORLDCALL COMMUNICATIONS WCCI 7822 YONKERS, NY INTERNATIONAL, INC. WORLD-LINK SOLUTIONS, INC. WRIS NEW YORK, NY WORLDLINK TECHNOLOGIES, L.L.C WOTC PARSIPPANY, NJ WORLDNET, L.L.C WODN LAWRENCE, KS WYANDOTTE TEL CO WYND 2034 MARION, LA WYKOFF TEL CO WYKF 1514 MN WYOMING MUTUAL TEL CO WYNG 1343 WYOMING, IA WYOMING TEL CO INC WMNG 2299 PINEDALE, WY XCOM TECHNOLOGIES INC. XCTG 7558 CAMBRIDGE, MA XDSL NETWORKS, INC. XDSL 4714 BALTIMORE, MD XIT RURAL TEL COOP INC XRRL 2170 DALHART, TX XO OHIO, INC (PREV NEXTLINK OHIO) NXOH 7520 COLUMBUS, OH XO PENNSYLVANIA, INC (PREV NEXTLINK PA) NXPA WYOMISSING, PA XO TENNESSEE, INC (PREV NEXTLINK NXTN 7344 NASHVILLE, TN TENNESSEE) XTEL COMMUNICATIONS, INC. XTEL 9739 MARLTON, NJ YADKIN VALLEY TEL MEMBERSHIP CORP YUMS 0511 YADKINVILLE, NC YATES CITY TEL CO YATS 1093 YATES CITY, IL YELCOT TELEPHONE COMPANY YLCT 1733 MOUNTAIN HOME, AR YELL COUNTY TEL CO INC YELL 1734 DANVILLE, AR YELM TEL CO YELM 2453 YELM, WA YEOMAN TEL CO INC YEMN 0839 YEOMAN, IN YIPES TRANSMISSION, INC. YPST 5319 SAN FRANCISCO, CA YORK TEL CO YORK 1638 STANLEY, ND YORKVILLE TEL COOP YRVL 0584 YORKVILLE, TN YOUR FIRST CHOICE COMMUNICATIONS, INC. YFCC 4889 QUINCY, MA YUKON TEL CO INC YUKN 3025 ANCHORAGE, AK YUKON TEL SYNDICATED LTD YKON DAWSON, YT YUKON-WALTZ TEL CO YWLZ 0215 YUKON, PA ZENDA TEL CO INC ZEND 1852 ZENDA, KS ZEPHION NETWORKS COMMUNICATIONS, INC. ZNCI 5452 FALLS CHURCH, VA ZONICOM, INC. ZNCM PHOENIX, AZ Z-TEL COMMUNICATIONS, INC. ELZC TAMPA, FL ZUMBROTA TEL CO ZMBR 1515 CLARA CITY, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 11–67 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Name

Proprietary — Licensed Material See proprietary restrictions on title page. 11–68 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

12 Exchange Carrier Codes Sorted by Company Code Table 12-1 Exchange Carrier Codes Sorted by Company Code

Alpha Numeric Company Name Headquarters Location AATC ATLANTIC TELECOM CORP BALA CYNWYD, PA ABGT 8084 ALBERTA GOVT TELEPHONES EDMONTON, AB ABSR 1601 ABSARAKA COOP TEL CO ABSARAKA, ND ACCI 2191 ACCIPITER COMMUNICATIONS, INC. GLENDALE, AZ ACCS 2090 ALENCO COMMUNICATIONS INC JOSHUA, TX ACCT 1663 ACCENT COMMUNICATIONS, INC. GROTON, SD ACDG ACCESS DIALING INC. VIRGINIA BEACH, VA ACET 1346 ACE TEL ASSN HOUSTON, MN ACIC 7070 ACI CORP ENGLEWOOD, CO ACII 7068 AMERITECH COMMUNICATIONS CHICAGO, IL INTERNATIONAL, INC. ACKR 0444 ACKERMAN TEL CO INC MS ACLD ACC LONG DISTANCE LTD TORONTO, ON ACOM AMCOM, L.L.C. DENVER, CO ACPT 8780 ACCESS POINT, INC. CARY, NC ACSO 7101 ADVANCED COMMUNICATIONS SERVICES INC MINNEAPOLIS, MN ACTX 7821 ACCUTEL OF TEXAS DALLAS, TX ADAR 1691 ALLIED TEL CO OF ARKANSAS INC AR ADAT 7995 ADVANCED AMERICAN TELECOM, INC. EATONTOWN, NJ ADFL 0336 ALLTEL FLORIDA INC MATTHEWS, NC ADGA 0357 ALLTEL GEORGIA INC MATTHEWS, NC ADJA 0109 ALLTEL NEW YORK - JAMESTOWN JAMESTOWN, NY ADKY 0402 ALLTEL KENTUCKY INC LITTLE ROCK, AR ADMO 1885 ALLTEL MISSOURI INC LITTLE ROCK, AR ADMP 0453 ALLTEL MISSISSIPPI INC MATTHEWS, NC ADMS 0976 ADAMS TEL COOP GOLDEN, IL ADNC 0476 ALLTEL CAROLINA INC - NORTH MATTHEWS, NC ADNO 0637 ALLTEL OHIO INC - NEWARK NEWARK, OH ADNY 0106 ALLTEL NEW YORK INC - FULTON JAMESTOWN, NY ADOK 1965 ALLTEL OKLAHOMA INC LITTLE ROCK, AR ADRJ 0113 ALLTEL NEW YORK - RED JACKET JAMESTOWN, NY ADSC 0517 ALLTEL SOUTH CAROLINA INC MATTHEWS, NC ADTN 0577 USE EC CODE CZUC POWELL, TN ADTX 2121 ALLTEL TEXAS INC LITTLE ROCK, AR ADVL 0552 ADAMSVILLE TEL CO INC MONROE, LA ADVM 3059 ADVAMTEL LLC DBA PLAN B SHREWSBURY, NJ COMMUNICATIONS

Proprietary — Licensed Material See proprietary restrictions on title page. 12–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location AESC AES CYGNUS, L.L.C. ARLINGTON, VA AFNI 3862 AMERICAN FIBER NETWORK, INC. OVERLAND PARK, KS AFVA AMERICAN FIBER NETWORK OF VIRGINIA, INC. OVERLAND PARK, KS AFYL 8378 ALLEGIANCE TELECOM, INC. DALLAS, TX AGNK 0978 ALHAMBRA-GRANTFORK TEL CO ALHAMBRA, IL AGST 0672 AUGUSTA TEL CO AUGUSTA, MI AGTE 2178 AGATE TEL CO AGATE, CO AHME 0071 ADDISON HOME TEL CO (NAME CHANGE) NY AHTC 2522 ADVANCED TELEPHONE SYSTEMS INC DBA HICKORY, PA HTC COMM. AIDT 1640 ARMOUR INDEPENDENT TEL CO ARMOUR, SD ALAL 0302 ALLTEL ALABAMA MATTHEWS, NC ALAR 1691 ALLTEL ARKANSAS INC LITTLE ROCK, AR ALBA 0668 ALBA TEL CO MI ALBN 2213 ALBION TEL CO INC ALBION, ID ALBY 1347 ALBANY MUTUAL TEL ASSN INC ALBANY, MN ALCC 2205 ALL CITY CUSTOMER TELEPHONE INC JAMAICA, NY ALDL 0669 ALLENDALE TEL CO ALLENDALE, MI ALEC 7017 ALEC, INC. PADUCAH, KY ALGT ALLTEL ALIL 1000 ALLTEL ILLINOIS INC RANTOUL, IL ALIN 0831 ALLTEL INDIANA INC OSSIAN, IN ALLM 0344 ALMA TEL CO INC ALMA, GA ALLT 9322 ALL TELECOMMUNICATIONS, INC. MINEOLA, NY ALMI 0681 ALLTEL MICHIGAN INC STOCKBRIDGE, MI ALMM 1860 ALMA TEL CO ALMA, MO ALMT 3288 ACCLAIM TELECOM CORPORATION LAWRENCE, MA ALNI ALLIANCE NETWORK INC NEW ORLEANS, LA ALNT ALIANT INC ST JOHNS, CN ALOH 0665 ALLTEL OHIO INC - WESTERN OHIO KENTON, OH ALPC ALPINE COMMUNICATIONS, L.C. DES MOINES, IA ALTL 0176 ALLTEL PENNSYLVANIA INC JAMESTOWN, NY ALTO 2037 ALTO TEL CO TX ALUT 1719 ALLIED UTILITIES CORP AR AMBR 0468 ATLANTIC TEL MEMBERSHIP CORP SHALLOTTE, NC AMCT 7812 AMERICAN TECHNOSTRUCTURE NEW YORK, NY AMEL 0217 AMELIA TEL CORP AMELIA, VA AMHR 0843 AMHERST TEL CO AMHERST, WI

Proprietary — Licensed Material See proprietary restrictions on title page. 12–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location AMLL 3846 AMERICAN LONG LINES, INC. HORSHAM, PA AMNI 8667 AMERICAN NETWORK, INC. NYC, NY AMNO 0195 ARMSTRONG TEL CO NORTH BUTLER, PA AMNS AMERICAN NETWORK SERVICES, INC. MT. VERNON, NY AMNY 0071 ARMSTRONG TEL CO - NY BULTER, PA AMPA 0189 ARMSTRONG TEL CO - PA BUTLER, PA AMRY 0842 AMERY TEL CO AMERY, WI AMSG 0256 ARMSTRONG TEL CO OF WEST VIRGINIA BUTLER, PA AMTG 0216 ARMSTRONG TEL CO OF MARYLAND BUTLER, PA AMVT 8395 AMERIVOICE TELECOMMUNICATIONS, INC MILWAUKEE, WI ANCR 3000 ANCHORAGE TEL UTILITY ANCHORAGE, AK ANCS ADVANCED COMMUNICATION SYSTEMS, INC. WOBURN, MA ANDR 1097 ANDREW TEL CO INC ANDREW, IA ANEI 7742 AMERICAN NETWORK EXCHANGE, INC. LAKE SUCCESS, NY ANOX 7675 ANNOX PLEASANT VIEW, TN ANTC 7197 ACC NATIONAL TELECOM CORP. ROCHESTER, NY ANTG 7913 AMERINET TELECOMMUNICATIONS GROUP, EAST NORTHPORT, NY INC. ANTS 7714 ACCESS NETWORK SERVICES, INC. CHANTILLY, VA AOSC ARBROS COMMUNICATIONS, INC. LANDOVER, MD AOSL ARBROS COMMUNICATIONS LICENSING LANDOVER, MD COMPANY, N.E. APCI 4100 AFFORDABLE PHONE COMPANY, INC. NORRISTOWN, PA APCM AEP COMMUNICATIONS INC RIVERSIDE PLAZA 25TH FLOO, OH APCO 3195 APCO TELECOMMUNCIATIONS DBA TARGET BEVERLY, MA TELECOM APHT ALPHANET TELECOM TORONTO, ON APPR 8201 ABITIBI PRICE INC IROQUOIS FALLS, ON ARCA 1098 ARCADIA TEL COOP ARCADIA, IA ARCN 7665 A.R.C. NETWORKS, INC. HAUPPAUGE, NY ARDA 0585 ARCADIA TEL CO ARCADIA, OH ARDM 0280 ARDMORE TEL CO INC ARDMORE, AL ARHC 8652 ALONGE REG. HEALTHCARE COMM DBA ERIE, PA HEALTH GROUP TELE. ARHD 1374 ARROWHEAD COMMUNICATIONS CORP HECTOR, MN ARKS 1692 ARKANSAS TEL CO INC CLINTON, AR ARPH 1516 ARAPAHOE TEL CO ARAPAHOE, NE ARTH 0586 ARTHUR MUTUAL TEL CO DEFIANCE, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 12–3 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location ARTN 1517 ARLINGTON TEL CO BLAIR, NE ARVG 1350 ARVIG TEL CO PEQUOT LAKES, MN ARVS 2255 3 RIVERS TEL COOP INC FAIRFIELD, MT ARZA 2171 ARIZONA TEL CO PHOENIX, AZ ASLP 3001 ARCTIC SLOPE TEL ASSN COOP INC ANCHORAGE, AK ASOT 2404 ASOTIN TEL CO MADISON, WI ASSR 1741 ASSARIA TEL EXCH INC ASSARIA, KS ASTY 1096 AMANA SOCIETY SERVICE CO TEL DIV AMANA, IA ASVY 0072 AUSABLE VALLEY TEL CO INC KEESVILLE, NY ATCM 0704 ACE TEL CO OF MICHIGAN INC MESICK, MI ATCT ALLTEL ATDC ATD COMMUNICATIONS, LTD. NEW YORK, NY ATEL ACTEL, INC CEDAR KNOLLS, NJ ATGI 4268 ADVANCED TELCOM GROUP, INC. SANTA ROSA, CA ATGP 7630 ATLANTIC TELESIS GROUP, INC. YONKERS, NY ATHN 0422 ATHENS TEL CO INC MONROE, LA ATKN 1101 ATKINS TEL CO INC ATKINS, IA ATLS 1966 ATLAS TEL CO BIG CABIN, OK ATNC 7788 ATLANTIC CONNECTIONS WORCESTER, MA ATNI ADVANCED TELECOMMUNICATION NETWORK, CHERRY HILL, NJ INC. ATTL 7421 AT&T (LOCAL) 295 N. MAPLE AVE., BASKIN, NJ ATTN 7762 PICUS COMMUNICATIONS, LLC (PREV VIRGINIA BEACH, VA ATLANTIC TELECOM) ATXT ATX TELECOMMUNICATIONS SERVICES, LTD BALA CYNWYD, PA AUGR 0671 AU GRES TEL CO MARION, LA AVRY 2036 AVERY TEL CO TX AVTR 2954 AVATAR TELECOM, INC. BEVERLY, MA AWCN ALLWORLD COMMUNICATIONS NETWORK, NEW YORK, NY L.L.C. AWTM ACROSS THE WORLD TELECOM, INC BIDDEFORD, ME AXPC AAMAX PUBLIC COMMUNICATIONS QUINCY, MA AXTI AX TELECOMMUNICATIONS, INCORPORATED FAIRFAX, VA AYMR 8202 AMTELECOM INC AYLMER, ON AYNT 4279 AFFINITY NETWORK INCORPORATED LAS VEGAS, NV AYRS 1105 AYRSHIRE FARMERS MUTUAL TEL CO AYRSHIRE, IA AYVL 0588 AYERSVILLE TEL CO DEFIANCE, OH BAND BELL ATLANTIC NETWORK DATA, INC. NEW YORK, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–4 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location BAPE 0512 BLUFFTON TEL CO INC BLUFFTON, SC BARG 0675 BARAGA TEL CO BARAGA, MI BBCO 3795 BACKBONE COMMUNICATIONS INC LOS ANGELES, CA BBIS BBIS COMMUNICATIONS, INC. MARBLEHEAD, MA BBRN 1115 BUTLER-BREMER MUTUAL TEL CO PLAINFIELD, IA BBWD 0856 BURLINGTON BRIGHTON & WHEATLAND MADISON, WI BCLD 0591 BUCKLAND MUTUAL TEL CO BUCKLAND, OH BCRL 0348 BULLOCH COUNTY RURAL TEL COOP INC STATESBORO, GA BCTC 8086 BRITISH COLUMBIA TEL CO BURNARY, BC BCVY 2259 BACA VALLEY TEL CO INC DES MOINES, NM BDGS 0844 BADGER STATE TEL CO INC MADISON, WI BDLV 0469 BARNARDSVILLE TEL CO LEESBURG. AL, NC BDTC 0844 BADGER TELECOM INC MADISON, WI BEAM TELEBEAM TELEPHONE SYSTEMS, INC. LIC, NY BERH 0849 BLACK EARTH TEL CO MADISON, WI BETC ATLANTIC ALLIANCE TELECOM.(PREV BELL STATEN ISLAND, NY TELE CO INC) BEVL 0144 BEALLSVILLE TEL CO PA BEVY 1358 BLUE EARTH VALLEY TEL CO BLUE EARTH, MN BFVY 0151 BUFFALO VALLEY TEL CO LEWISBURG, PA BGBN 2039 BIG BEND TEL CO INC ALPINE, TX BGGS 1968 BEGGS TEL CO BEGGS, OK BGMI 8359 BRIDGECOM INTERNATIONAL, LLC MOUNT KISCO, NY BGRN 0147 BIG RUN TEL CO PA BGSY 2192 BIG SANDY TELECOM INC SIMLA, CO BGTC BORG TELECOMMUNICATIONS INC TORONTO, ON BHME 0742 BLOOMINGDALE HOME TEL CO INC BLOOMINGDALE, IN BHVE 2284 BEEHIVE TEL CO INC LAKE POINT, UT BIDD 9472 BIDDEFORD INTERNET CORP. BIDDEFORD, ME BISN BISON TEL CO INC KS BJOU 2181 BIJOU TEL COOP ASSN INC BYERS, CO BKCC 1604 BEK COMMUNICATIONS COOPERATIVE STEELE, ND BKFB 7219 BROOKS FIBER COMMUNICATIONS GRAND RAPIDS, MI BKVL 0150 BROOKVILLE TEL CO EXPORT, PA BLAR 1524 BLAIR TEL CO BLAIR, NE BLBY 3003 BRISTOL BAY TEL COOP INC KING SALMON, AK BLCA BELL CANADA MONTREAL,QUEBEC, ON BLCI 3032 BEAR LAKE COMMUNICATIONS INC FAIRVIEW, UT

Proprietary — Licensed Material See proprietary restrictions on title page. 12–5 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location BLDI 7734 BUSINESS LONG DISTANCE, INC. READING, MA BLDL 0679 BLOOMINGDALE TEL CO BLOOMINGDALE, MI BLDS 0554 BLEDSOE TEL COOP PIKEVILLE, TN BLDW 0846 BALDWIN TELECOM INC BALDWIN, WI BLEC B-LEC, INC. NEW HYDE PARK, NY BLFD 2042 BLUFFDALE TEL CO TX BLFT 2235 BLACKFOOT TEL COOP INC MISSOULA, MT BLIN 2933 BELL WEST INC. (PREV BELL INTRIGNA INC) EDMONTON, AB BLKD 1357 BLACKDUCK TEL CO BLACKDUCK, MN BLKE 1645 BROOKINGS LAKE TEL CO SD BLLR 0396 BALLARD RURAL TEL COOP CORP INC LA CENTER, KY BLMR 0850 BLOOMER TEL CO BLOOMER, WI BLMT 0847 BELMONT TEL CO PLATTEVILLE, WI BLNC 2182 BLANCA TEL CO ALAMOSA, CO BLND 0678 BLANCHARD TEL ASSN INC BLANCHARD, MI BLPR 2786 BALPRI COMOMMUNICATIONS, INC. WASHINGTON, DC BLRC BLUERIVER COMMUNICATIONS, INC. SALEM, IN BLRG 0346 BLUE RIDGE TEL CO BLUE RIDGE, GA BLRT 4077 PALMERTON LONG DISTANCE DBA BLUE PALMERTON, PA RIDGE TELEPHONE BLSM 2038 BLOSSOM TEL CO BLOSSOM, TX BLTC 1642 BALTIC TELECOM COOP BALTIC, SD BLVY 1746 BLUE VALLEY TEL CO INC HOME, KS BMAA 0146 BETHEL & MT AETNA TEL & TEL CO PA BMPL 8205 BRUCE MUN TEL SYS KINCARDINE, ON BMUN 8203 BLANSHARD MUN TEL SYS KIRKTON, ON BNDL 0851 BONDUEL TEL CO MADISON, WI BNFD 0674 BANFIELD TEL CO MI BNLM 0553 BEN LOMAND RURAL TEL COOP INC MCMINNVILLE, TN BNMN 2455 BENKELMAN TELEPHONE COMPANY, INC., BENKELMAN, NE DBA BWTELCOM BNNL 1107 BALDWIN NASHVILLE TEL CO INC BALDWIN, IA BNRD 1110 BERNARD TEL CO INC LOST NATION, IA BNRG 0590 BENTON RIDGE TEL CO BENTON RIDGE, OH BNTN 1356 BENTON COOP TEL CO RICE, MN BNVL 0145 BENTLEYVILLE TEL CO BENTLEYVILLE, PA BOCI BROADBAND OFFICE COMMUNICATIONS, INC VIENNA, VA BONT 8051 BELL ONTARIO TORONTO, ON BPST 0463 BPS TELEPHONE CO. MALDEN, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 12–6 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location BPTA 2043 BYERS & PETROLIA TEL CO INC BYERS, TX BQUE 8050 BELL QUEBEC MONTREAL, PQ BRAH 0035 BRAHMACOM, INC. BROOKLINE, MA BRBC BROADBAND COMMUNICATIONS, INC WINCHESTER, MA BRBG 0398 BRANDENBURG TEL CO BRANDENBURG, KY BRBR 2073 BORDER TO BORDER COMMUNICATIONS KERRVILLE, TX BRBS 1859 BOURBEUSE TEL CO SULLIVAN, MO BRCE 0855 BRUCE TEL CO INC BRUCE, WI BRCL 1361 BRICELYN MUTUAL TEL CO MN BRCY 1108 BARNES CITY COOP TEL CO BARNES CITY, IA BRDT BURDETT TEL CO KS BRED 1112 BREDA TEL CORP BREDA, IA BRFR 1649 BERESFORD MUNICIPAL TEL CO BERESFORD, SD BRGN 0848 BERGEN TEL CO SHARON, WI BRGR 0220 BURKE’S GARDEN TEL CO INC BURKE’S GARDEN, VA BRKC BROOKE COMMUNICATIONS, INC LONDON, KY BRKL 1113 BROOKLYN MUTUAL TEL CO BROOKLYN, IA BRKS 0073 BERKSHIRE TEL CO KINDERHOOK, NY BRMD BROMIDE TEL CO OK BRMT 0283 BRINDLEE MOUNTAIN TEL CO ARAB, AL BROK 8204 BROOKE MUN TEL SYS INWOOD, ON BRPD 0002 BRYANT POND TEL CO BUCKFIELD, ME BRRI 7719 BLUE RIBBON RENTALS II, INC. CUY FALLS, OH BRSL BROADSLATE NETWORKS INC (PREV CHARLOTTESVILLE, VA CARDINAL COMM, VA) BRST BROADSTREET COMMUNICATIONS, INC. CANONSBURG, PA BRWR 1362 BRIDGE WATER TEL CO MONTICELLO, MN BRWT 0158 BRIDGEWATER-CANISTOTA (INDEPENT HARTFORD, SD TELEPHONE COMPANY) BRYC 0676 BARRY COUNTY TEL CO DELTON, MI BRZR 2040 BRAZORIA TEL CO BRAZORIA, TX BRZS 2041 BRAZOS TEL COOP INC OLNEY, TX BSCM 0589 BASCOM MUTUAL TEL CO BASCOM, OH BSEI 8394 BELLSOUTH BSE INC ATLANTA, GA BSMT 1816 BLUESTEM TELEPHONE COMPANY DODGE CITY, KS BSNS 1643 BISON STATE TEL CO SD BSTL 9249 BEST TELECOM LTD. ISLANDIA, NY BSVA BROADSTREET COMMUNICATIONS OF CANONSBURG, PA VIRGINIA,LLC

Proprietary — Licensed Material See proprietary restrictions on title page. 12–7 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location BTIT 7794 BUSINESS TELECOM INC RALEIGH, NC BTLR 0284 BUTLER TEL CO INC BAY SPRINGS, MS BTLS 3002 BETTLES TEL CO BETTLES, AK BTLY 0347 BRANTLEY TEL CO INC NAHUNTA, GA BTSC BOSTON TELECOMMUNICATION SERVICES LYNN, MA CORP BTSI 8360 BUSINESS TECHNOLOGY SYSTEMS, INC. POMPANO BEACH, FL BTWD 0038 BRETTON WOODS TEL CO BRETTON WOODS, NH BUCE 0447 BRUCE TEL CO INC BRUCE, MS BUGI 0219 BUGGS ISLAND TEL COOP BRACEY, VA BURT 1114 BURT TEL CO BURT, IA BUSH 3004 BUSH-TEL INC ANIAK, AK BUVL 0282 BLOUNTSVILLE TEL CO INC BLOUNTSVILLE, AL BVCK 2359 BEAVER CREEK COOP TEL CO BEAVER CREEK, OR BWEB 5381 BESTWEB CLEC, LTD. CROTON-ON-HUDSON, NY BWTE 8697 BALTIMORE-WASHINGTON TELEPHONE LAUREL, MD BXBY 1969 BIXBY TEL CO INC BIXBY, OK BYLD 0925 BAYLAND TEL INC ABRAMS, WI BYSP 0446 BAY SPRINGS TEL CO INC BAY SPRINGS, MS BZWD 0149 BREEZEWOOD TEL CO BREEZEWOOD, PA CAMB CAMBRIAN COMMUNICATIONS LLC FAIRFAX, VA CAMD 0744 CAMDEN TEL CO INC CAMDEN, IN CAMN 0351 CAMDEN TEL & TEL CO INC ST MARYS, GA CAOR 2311 CALIFORNIA-OREGON TEL CO DORRIS, CA CAPC 2304 CALIFORNIA PACIFIC UTILITIES CO CA CAPU 3007 CORDOVA TEL COOP INC CORDOVA, AK CARN 1976 CARNEGIE TEL CO CARNEGIE, OK CARO 8842 CARONET, INC. RALEIGH, NC CARR 0683 CARR TEL CO CARR, MI CASC 0857 CASCO TEL CO CASCO, WI CASM 0472 CASS COUNTY TELEPHONE COMPANY PECULIAR, MO (MISSOURI) CASS 0984 CASS COUNTY TEL CO VIRGINIA, IL CASY 1119 CASEY MUTUAL TEL CO CASEY, IA CATC CAT COMMUNICATIONS INTERNATIONAL, INC. CLOVERDALE, VA CAVL 0986 CHANDLERVILLE TEL CO VIRGINIA, IL CB CINCINNATI BELL TELEPHONE COMPANY CINCINNATI, OH CBCY 0872 CUBA CITY TEL EXCH CO INC PLATTEVILLE, WI CBML 1650 CITY OF BROOKINGS MUNI TEL DEPT BROOKINGS, SD

Proprietary — Licensed Material See proprietary restrictions on title page. 12–8 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CBNL 1353 CITY OF BARNESVILLE TEL UTIL BARNESVILLE, MN CBRD 1146 CUMBERLAND TEL CO CUMBERLAND, IA CBRG 2215 CAMBRIDGE TEL CO INC CAMBRIDGE, ID CBRN 0861 CHIBARDUN TEL COOP INC DALLAS, WI CBST 0005 COBBOSSEECONTEE TEL CO WEST GARDINER, ME CBTL CABTEL COMMUNICATIONS, INC. SANDS POINT, NY CCAL 7071 CANCALL COMMUNICATION, INC. NEWARK, NJ CCAM 3346 CLOSECALL AMERICA, INC CHESTER, MD CCHR 0866 COCHRANE COOP TEL CO COCHRANE, WI CCLT 8991 CCL TELECOMMUNICATIONS, INC. CEDAR KNOLLS, NJ CCMA 3703 C2C FIBER OF MASSACHUSETTS, LLC. HOUSTON, TX CCMI 0672 COMMUNICATION CORP OF MICHIGAN AUGUSTA, MI CCMR 0158 CLEARFIELD & CAMBRIA TEL CO PA CCNS 6172 COMMUNICATIONS INC CAMDEN, NJ CCRD 0690 CONCORD TEL CO INC MI CCRL 0753 CLAY COUNTY RURAL TEL COOP INC CLOVERDALE, IN CCSI 0809 COMMUNICATION CORP OF SOUTHERN POSEYVILLE, IN INDIANA CCSL 6165 CCSI TELECOM, INC. BOHEMIA, NY CCST 0682 C C & S TELCO INC JACKSON, MI CCTC 4159 CONNECT COMMUNICATIONS CORP DBA LITTLE ROCK, AR TOTAL CONNECT CD 9211 VERIZON WASHINGTON DC INC (PREV BELL ASHINGTON, DC ATLANTIC-WAS CDDN 0431 CADDOAN TEL CO MONROE, LA CDTS COMMITTED TELEPHONE SERVICES EAST ORANGE, NJ CDWR 8207 COLDWATER MUN TEL SYS COLDWATER, ON CEAR 1697 CENTRAL ARKANSAS TEL COOP INC DONALDSON, AR CECI CONSOLIDATED EDISON COMMUNICATIONS, NEW YORK, NY INC. CEFL 0340 CENTRAL TEL CO OF FLORIDA TALAHASSEE, FL CEIL 0985 CENTRAL TEL CO OF ILLINOIS DES PLAINES, IL CELA 0423 CENTRAL LOUISIANA TEL CO INC MONROE, LA CEMO 1846 CENTRAL TEL CO OF MISSOURI MO CENE 1528 CENTRAL NE TEL CO NE CENT 0684 CENTRAL TEL CO MARION, LA CEOH 0630 CENTURY TEL CO OF OHIO MONROE, LA CEOK 1977 CENTRAL OKLAHOMA TEL CO DAVENPORT, OK CERE 0078 CHAUTAUQUA & ERIE TEL CORP WESTFIELD, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–9 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CERL CENTRAL TEL CO IL CETC CENTRAL TELEPHONE CO INC MI CETL 1367 CENTRAL TEL CO OF MINNESOTA BURNSVILLE, MN CETR 1127 CENTRAL TEL CO OF IOWA FORT DODGE, IA CETX 2052 CENTRAL TEXAS TEL COOP INC GOLDTHWAITE, TX CEUT 2277 CENTRAL UTAH TEL INC FAIRVIEW, UT CEVA 0254 CENTRAL TEL CO OF VIRGINIA CHARLOTTESVILLE, VA CFTN 2054 CLIFTON TEL CO TX CFWN CFW NETWORK CO. WAYNESBORO, VA CFWO 0226 CLIFTON FORGE WAYNESBORO TEL CO STAUNTON, VA CHAL 4821 360 COMM CO OF CHARLOTTESVILLE DBA LITTLE ROCK, AR ALLTEL CHAT 0427 CHATHAM TEL CO CHATHAM, LA CHCH 0040 CHICHESTER TEL CO CHICHESTER, NH CHCM 0354 CHICKAMAUGA TEL CORP BAY SPRINGS, MS CHCP 4158 CONNECT COMMUNICATIONS CORPORATION LITTLE ROCK, AR DBA CONNECT CHCS 1980 CHICKASAW TEL CO SULPHUR, OK CHCT 1893 CHOCTAW TEL CO HALLTOWN, MO CHES 1126 CHESTER TEL CO CHESTER, IA CHGW 2289 CHUGWATER TEL CO CHUGWATER, WY CHHL 2349 CHURCHILL COUNTY TELEPHONE FALLON, NV CHHM 0685 CHATHAM TEL CO CHATHAM, MI CHIL CHILITECH INTERNET SOLUTIONS, INC. WILLIAMSPORT, PA CHIN 0004 CHINA TEL CO SOUTH CHINA, ME CHLC 0597 CHILLICOTHE TEL CO CHILLICOTHE, OH CHMP 0594 CHAMPAIGN TEL CO URBANA, OH CHOC CHOICE ONE COMMUNICATIONS ROCHESTER, NY CHOT 1981 CHOUTEAU TEL CO CHOUTEAU, OK CHPT 0694 FARMERS MUTUAL-CHAPIN DBA CHAPIN TEL ELSIE, MI CO CHRK 1979 CHEROKEE TEL CO CALERA, OK CHRN 8206 COCHRANE MUN TEL SYS COCHRANE, ON CHRT 9697 CHR TELECOMMUNICATIONS WOODSIDE, NY CHSN 0515 CHESNEE TEL CO CHESNEE, SC CHSP CHESAPEAKE TELECOMMUNICATIONS WARSAW, VA CORPORATION CHST 0516 CHESTER TEL CO CHESTER, SC CHTL 7668 CHOCTAW TELECOMMUNICATIONS, LLC. HOUSTON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 12–10 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CIIC 2690 CI2, INC ATLANTA, GA CIMR 1982 CIMARRON TEL CO MANNFORD, OK CINO 7208 CRG INTERNATIONAL DBA NETWORK ONE ATLANTA, GA CINS 1129 CITIZENS MUTUAL TEL CO BLOOMFIELD, IA CIPH 0426 CAMPTI-PLEASANT HILL TEL CO PLEASANT HILL, LA CISI COMMUNITY INTERNET SYSTEMS, INC. COLUMBUS, NE CITZ 0225 CITIZENS TEL COOP FLOYD, VA CKNW CLICK NETWORK TACOMA, WA CKSG 0156 CITIZENS TEL CO OF KECKSBURG MAMMOTH, PA CKVL 2290 COKEVILLE TEL CO INC UT CKVT 1120 CLARKSVILLE TELEPHONE COMPANY PLAINFIELD, IA CLAR 1730 CONTEL OF ARKANSAS INC DBA GTE AR RUSSELLVILLE, AR CLBL COLUMBIA TELECOMMUNICATIONS, INC. BATON ROUGE, LA CLBN 0557 CLAIBORNE TEL CO MONROE, LA CLBS 1756 COLUMBUS TEL CO COLUMBUS, KS CLCA 2302 CONTEL OF CALIFORNIA VICTORVILLE, CA CLCC 3333 COPPER VALLEY TELEPHONE, INC. WILLCOX, AZ CLCK 2363 CLEAR CREEK MUTUAL TEL CO OREGON CITY, OR CLCY 1370 CLARA CITY TEL EXCH CO CLARA CITY, MN CLEC 2523 CLEC COMMUNICATIONS, CORP. PEARL RIVER, NY CLEM 1372 CLEMENTS TEL CO REDWOOD FALLS, MN CLEW 8551 CITY OF LAKELAND ELECTRIC & WATER LAKELAND, FL CLFK 3308 CLARK FORK TELECOMMUNICATIONS MISSOULA, MT CLHC 0448 CALHOUN CITY TEL CO INC CALHOUN CITY, MS CLIA 1207 CONTEL OF IOWA DBA GTE IL MENDOTTA HTS, MN CLIL 1036 CONTEL OF ILLINOIS DBA GTE IL SYCAMORE, IL CLIN 0779 CONTEL OF INDIANA INC DBA GTE INDIANA SEYMOUR, IN CLIT 1132 CLEAR LAKE INDEPENDENT TEL CO CLEAR LAKE, IA CLKS 1790 CONTEL OF KANSAS INC DBA GTE SYS OF AR GARDNER, KS CLKY 0410 CONTEL OF KENTUCKY INC DBA GTE KY HERSHEY, PA CLLK 0865 CLEAR LAKE TEL CO INC CLEAR LAKE, WI CLMA COLUMBIA TEL CO OR CLME 0014 CONTEL OF MAINE INC DBA GTE OF MAINE DAMARISCOTTA, ME CLMI 0702 CONTINENTAL TEL CO OF MICHIGAN MI CLMN 1140 CONTEL OF MINNESOTA INC DBA GTE MN MENDOTTA HEIGHTS, MN CLMO 1922 CONTEL OF MISSOURI INC DBA GTE MO WENTZVILLE, MO CLMS 0410 CONTINENTAL TEL CO- MID-SOUTH DIV KY CLMT 3310 CENTRAL MONTANA COMMUNICATIONS INC HAVRE, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 12–11 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CLMX 0688 CLIMAX TEL CO CLIMAX, MI CLNC 1130 CLARENCE TEL CO INC CLARENCE, IA CLND 1447 CONTEL OF NORTH DAKOTA INC ST LOUIS, MO CLNE 1740 CONTINENTAL TEL CO OF NEBRASKA NE CLNH 0041 CONTEL OF NEW HAMPSHIRE DBA GTE NH HILLSBORO, NH CLNI 6173 CEL-NET I COMMUNICATIONS, INC. FLUSHING, NY CLNT CALL-NET TELECOMMUNICATIONS LTD WILLOWDALE, ON CLNW 2449 CONTINENTAL TEL CO OF THE NORTHWEST BELLEVUE, WA CLOK CONTINENTAL TEL CO OF OKLAHOMA OK CLPA 0170 CONTEL OF PENNSYLVANIA INC DBA GTE PA HERSHEY, PA CLRK 1531 CLARKS TEL CO CLARKS, NE CLRS 2301 CALAVERAS TEL CO COPPEROPOLIS, CA CLSC 0526 CONTEL OF SC INC DBA GTE SC SIMPSONVILLE, SC CLSD 1530 CONSOLIDATED TELCO INC LINCOLN, NE CLSK 1643 CONTEL OF SOUTH DAKOTA INC ST PAUL, MN, SD CLSO 0281 CONTEL OF THE SOUTH DBA GTE SOUTH THOMASTON, GA CLST 1819 CLASSIC TELEPHONE WAKEENEY, KS CLTM CONTINENTAL TELECOM INC (CONTEL) ATLANTA, GA CLTX 2154 CONTEL OF TEXAS INC DBA GTE TX DALLAS, TX CLVA 0233 CONTEL OF VIRGINIA INC DBA GTE VA MECHANICSVILLE, VA CLVL 0990 CLARKSVILLE MUTUAL TEL CO MARSHALL, IL CLVT 0070 CONTEL OF VERMONT INC DBA GTE VT SPRINGFIELD, VT CLWT 4426 USE EC CODE CZUC SHOWLOW, AZ CLWV 4338 USE EC CODE CZUC BLUEFIELD, WV CLWY 1365 CALLAWAY TEL EXCH DETROIT LAKES, MN CLYM 0082 CLYMER TEL CO INC NORTH SYRACUSE, NY CM 9212 VERIZON MARYLAND INC (PREV BELL BALTIMORE, MD ATLANTIC-MD,INC) CMAV 7031 COMAV CORPORATION FRAMINGHAM, MA CMBR 1526 CAMBRIDGE TEL CO CAMBRIDGE, NE CMBY 2065 CUMBY TEL COOP INC CUMBY, TX CMCC CRYSTAL COMMUNICATIONS CORP. WESTBORO, MA CMCO 7791 COMMUNICATIONS CONTROL CORPORATION BROOKLYN, NY CMDN 0682 CAMDEN TEL CO MI CMGV 0604 COLUMBUS GROVE TEL CO COLUMBUS GROVE, OH CMIM COMMUNICATIONS IMAGE TECHNOLOGIES, DUNN LORING, VA INC CMLC 1133 C-M-L TEL COOP ASSN OF MERIDEN IOWA MERIDEN, IA CMNC 2060 COMANCHE COUNTY TEL CO INC DE LEON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 12–12 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CMNI COMMUNITY NETORKS, INC. LONG ISLAND CITY, NY CMNK 7633 COMMUNITY NETWORK SERVICES, INC. NEW YORK, NY CMNY 2061 COMMUNITY TEL CO WINDTHORST, TX CMOT CENTRAL MISSOURI TELECOMMUNICATIONS, OSAGE BEACH, MO INCORPORATED CMPL 4601 COMMUNICATIONS PLUS, INC. MORGANTOWN, WV CMRN 0425 CAMERON TEL CO SULPHUR, LA CMWI 0841 CENCOM OF WISCONSIN INC RUSHFORD, MN CMWL 0161 COMMONWEALTH TEL CO DALLAS, PA CNBT 1141 CORN BELT TEL CO WALL LAKE, IA CNBY 2362 CANBY TEL ASSN CANBY, OR CNCD 0559 CONCORD TEL EXCH INC KNOXVILLE, TN CNCK 1136 COON CREEK TEL CO BLAIRSTOWN, IA CNCM CONNECT.COM LITTLE ROCK, AR CNCR 0474 CONCORD TEL CO CONCORD, NC CNCY 2057 COLEMAN COUNTY TEL COOP INC SANTA ANNA, TX CNGI CONVERGENCE, INC TAMPA, FL CNGV 1758 COUNCIL GROVE TEL CO COUNCIL GROVE, KS CNHM 1761 CUNNINGHAM TEL CO INC GLEN ELDER, KS CNJT 1121 CENTER JUNCTION TEL CO CENTER JUNCTION, IA CNMI 0702 CENTURY TEL OF MICHIGAN INC MARION, LA CNNT 0606 CONNEAUT TEL CO CONNEAUT, OH CNSI CIERA NETWORK SYSTEMS, INC. HOUSTON, TX CNSL 1607 CONSOLIDATED TEL COOP DICKINSON, ND CNTG 0162 CONESTOGA ENTERPRISES , INC BIRDSBORO, PA CNTL CENTRAL TEL CO IL CNTN 0152 CANTON TEL CO CANTON, PA CNTR 0471 CENTRAL TEL CO OF NORTH CAROLINA HICKORY, NC CNTY 0440 CENTURY TELEPHONE ENTERPRISES MONROE, LA CNVC 7967 CONECTIV COMMUNICATIONS, INC NEWARK, DE CNVL 0154 CENTERVILLE TEL CO PA CNVT 1440 CANNON VALLEY TELECOM INC BRICELYN, MN CNVY 1974 CANADIAN VALLEY TEL CO CROWDER, OK COBS COMPLETE BUSINESS SYSTEMS, INC. TYNGSBORO, MA COFH 1653 CITY OF FAITH MUNICIPAL TEL CO FAITH, SD COLB 2204 COLUMBINE TEL CO FREEDOM, WY COLO 1134 COLO TEL CO COLO, IA COLT 2364 COLTON TEL CO COLTON, OR

Proprietary — Licensed Material See proprietary restrictions on title page. 12–13 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location COMB IG2, INC. (PREV COMPUTER BUSINESS KEW GARDENS, NY SCIENCES, INC. COMI 4090 1 COM, INC WRENTHAM, MA CONR 2062 CONROE TEL CO TX CONY 2457 COVISTA OF NEW YORK, INC. LITTLE FALLS, NJ CORD CORDIA COMMUNICATIONS CORP NORWALK, CT CORE CORE COMMUNICATIONS, INC. WASHINGTON, DC CORN 2261 CORONA TEL CO NM COSL 0424 COASTAL TEL CO LA COSS CO SPACE SERVICES, LLC SOMERVILLE, MA COVD 7871 COVAD COMMUNICATIONS COMPANY SANTA CLARA, CA COVL 1137 COON VALLEY COOP TEL ASSN INC MENLO, IA COVY 2059 COLORADO VALLEY TEL COOP INC LA GRANGE, TX COXC 7987 COXCOM, INC ATLANTA, GA COZD 1534 COZAD TEL CO COZAD, NE CPBG 0163 COOPERSBURG TEL CO COOPERSBURG, PA CPCI 8407 COOPERATIVE COMMUNICATIONS INC BELLEVILLE, NJ CPLN 0077 CHAMPLAIN TEL CO CHAMPLAIN, NY CPNL 3402 USE EC CODE CZUC ELK GROVE, CA CPPW 0680 CHIPPEWA COUNTY TEL CO BRIMLEY, MI CPRR 2046 CAP ROCK TEL CO INC SPUR, TX CPRV 1303 COOPERATIVE TEL EXCH STANHOPE, IA CPTN CP-TEL NETWORK SERVICES, INC. NATCHITOCHES, LA CPTV 1139 COOPERATIVE TEL CO VICTOR, IA CPVY 3006 COPPER VALLEY TEL COOP INC VALDEZ, AK CQMN 0860 CHEQUAMEGON TEL COOP INC CABLE, WI CRAG 1535 CRAIG TEL CO NE CRCA CRC COMMUNICATIONS OF CALIFORNIA, INC. TURLOCK, CA CRCC 1255 CRC COMMUNICATIONS OF MAINE, INC. GRAY, ME CRCL 8208 COURCELLES INC LA CIE DE TEL DE COURCELLES, PQ CRCT 0561 CROCKETT TEL CO INC FRIENDSHIP, TN CRDG 0983 CAMBRIDGE TEL CO GENESEO, IL CRDN 0870 CRANDON TEL CO RHINELANDER, WI CREM 1190 CARBON/EMERY TELCOM, INC. ORANGEVILLE, UT CRIN 0747 CENTRAL INDIANA TEL CO INC BATTLE GROUND, IN CRLN 0470 CAROLINA TEL & TEL CO (UNITED SYM) TARBORO, NC CRMN CARMEN TEL CO OK CRNJ CELLLAR RENTALS DBA NEW JERSEY HARRISBURG, PA TELECONNECT

Proprietary — Licensed Material See proprietary restrictions on title page. 12–14 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CRNW 7906 CLARICOM NETWORKS INC MILFORD, CT CRPA CELLULAR RENTALS DBA PA TELECOM HARRISBURG, PA CRPN 0085 CROWN POINT TEL CORP CROWN POINT, NY CRPS 1530 CHRISPS TEL CO NE CRSS 1985 CROSS TEL CO WARNER, OK CRST 1647 CHEYENNE RIVER SIOUX TRIBAL TEL AUTH EAGLE BUTTE, SD CRTC 1009 C-R TEL CO RANSOM, IL CRTR 1863 CARTER COUNTY TEL CO MO CRTS 1536 CURTIS TEL CO CURTIS, NE CRTV 1864 CHARITON VALLEY TEL CO BUCKLIN, MO CRTX 2114 CENTRAL TEL CO OF TEXAS KILLEEN, TX CRVI 0756 CRAIGVILLE TEL CO INC CRAIGVILLE, IN CRWL CRESWELL TEL CO OR CSAR 1700 CONTEL OF KANSAS DBA GTE SYS OF AR-AR OVERLAND PARK, KS CSCD 1118 CASCADE TEL CO CASCADE, IA CSCI 7450 COMMSOUTH COMPANIES, INC. ARLINGTON, TX CSCT 1125 CENTRAL SCOTT TEL ELDRIDGE, IA CSDG 0076 CASSADAGA TEL CORP FREDONIA, NY CSDU 2371 CASCADE UTILITIES INC ESTACADA, OR CSIA 1135 CONTEL OF KANSAS DBA GTE OF AR-IA OVERLAND PARK, KS CSIN 0776 COMMUNICATIONS CORP OF INDIANA ROACHDALE, IN CSLD 1532 CONSOLIDATED TEL CO LINCOLN, NE CSLI 0761 REVOLUTION NETWORKS LLC(PREV WINTHROP, ME COMMUNITY SER... CSLK 1499 CROSSLAKE TEL CO CROSSLAKE, MN CSLT 1373 CONSOLIDATED TEL CO BRAINERD, MN CSMO 1846 CONTEL SYSTEMS OF MO DBA GTE SYS OF MO WENTZVILLE, MO CSPE 4903 COMSCAPE TELECOMMUNICATIONS, INC. WEST PALM BEACH, FL CSRV 8316 COSERV, LLC LEWISVILLE, TX CSTC CSTC, LLC RENSSELAER, NY CSTE 0424 COASTAL TEL & ELEC CORP MONROE, LA CSTL 0285 CASTLEBERRY TEL CO INC CASTLEBERRY, AL CSTR 2218 CUSTER TEL COOP INC CHALLIS, ID CSTS 0859 CENTRAL STATE TEL CO MADISON, WI CSVC 0015 COMMUNITY SERVICE TEL CO WINTHROP, ME CSVL 0993 CROSSVILLE TEL CO CROSSVILLE, IL CTAR 1706 CENTURY TELEPHONE OF ARKANSAS HARDY, AR CTCA 1144 CENTURYTEL OF CENTRAL ARKANSAS, LLC. JACKSONVILLE, AR

Proprietary — Licensed Material See proprietary restrictions on title page. 12–15 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CTCI 4427 USE EC CODE CZUC MCCALL, ID CTCM 7759 CTC COMMUNICATIONS CORP. WALTHAM, MA CTCN CT COMMUNICATIONS, INC CONCORD, NC CTCT 4336 USE EC CODE CZUC COOKEVILLE, TN CTCU 4429 USE EC CODE CZUC MOAB, UT CTCW 1159 CENTURYTEL OF CENTRAL WISCONSIN, LLC. LA CROSSE, WI CTDM INVALID - DO NOT USE * CTEM 1883 KANSAS STATE TELCO DBA CONTEL OF E MO OVERLAND PARK, KS CTES 1865 CITIZENS TEL CO HIGGINSVILLE, MO CTIH 2225 CENTURY TEL OF IDAHO INC MARION, LA CTIN 3400 CITIZENS COMMUNICATIONS (PREV CITIZENS TX TEL CO) CTIZ 0751 CITIZENS TEL CORP WARREN, IN CTLT 7706 CAPITAL TELECOMMUNICATIONS, INC. YORK, PA CTMD 2477 COMCAST TELEPHONY COMMUNICATIONS OF PHILADELPHIA, PA MARYLAND, INC. CTMN 4322 USE EC CODE CZUC LIBBY, MT CTMS 2113 CENTRAL TEL CO MIDSTATE TX CTMW 0671 CENTURY TEL MIDWEST INC MONROE, LA CTNA 1142 CENTURYTEL OF NORTHWEST ARKANSAS, LLC RUSSELLVILLE, AR CTNC 0509 CONTEL OF NORTH CAROLINA INC DBA GTE NC WEAVERVILLE, NC CTNE USE EC CODE CZUC PLANO, TX CTNL 0607 CONTINENTAL TEL CO OF OHIO CONTINENTAL, OH CTNW 5632 CT COMMUNICATIONS NETWORK, INC. URBANA, OH CTPC 0103 COUNCIL TELEPHONE COMPANY, INC. CAMBRIDGE, ID CTRL 2348 CENTRAL TEL CO - NEVADA LAS VEGAS, NV CTSC 1151 SPECTRA COMMUNICATIONS GROUP, LLC KANSAS CITY, MO CTSL CONVERGENT TELESIS LLC SOUTHAMPTON, NY CTUS 1155 TELEPHONE USA OF WISCONSIN, LLC. LA CROSSE, WI CTVT 3320 CONTOOCOOK VALLEY TELEPHONE CONTOOCOOK, NH CTZE 0750 CITIZENS TEL CO INC FAIRMOUNT, IN CTZT 3401 USE EC CODE CZUC CAVE JUNCTION, OR CTZU 2172 USE EC CODE CZUC KINGMAN, AZ CTZZ 0355 CITIZENS TEL CO IN GA LESLIE, GA CUBE 2861 CUBE COMPUTER CORPORATION HAWTHORNE, NY CUCA 2308 USE EC CODE CZUC ELK GROVE, CA CUDL 0080 CHENANGO & UNADILLA TEL CO NY CULS 3005 CIRCLE UTILITIES CIRCLE, AK CUNY 0096 USE EC CODE CZUC JOHNSTOWN, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–16 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location CUPA 0157 CITIZENS UTILITIES CO OF PA NEW BETHLEHEM, PA CURY CURRY COMMUNICATIONS, INC EAST PITTSBURGH, PA CUTS 0356 COASTAL UTILITIES INC HINESVILLE, GA CV 9213 VERIZON VIRGINIA INC (PREV BELL ATLANTIC- RICHMOND, VA VA,INC) CVCS CONVERGENT COMMUNICATIONS SERVICES ENGLEWOOD, CO CVFS 0868 COON VALLEY FARMERS TEL CO COON VALLEY, WI CVLD 1698 CLEVELAND COUNTY TEL CO INC RISON, AR CVLI CABLEVISION LIGHTPATH, INC. HICKSVILLE, NY CVLY 2306 CAPAY VALLEY TEL SYSTEM INC GUINDA, CA CVTI 3330 CHAMPLAIN VALLEY TELECOM INC WAITSFIELD, VT CVTL 4725 CAVALIER TELEPHONE, L.L.C. RICHMOND, VA CVVA COVISTA OF VIRGINIA, INC. LITTLE FALLS, NJ CW 9214 VERIZON WEST VIRGINIA INC (PREV BELL CHARLESTON, WV ATLANTIC-WVA, CWCH 2410 COWICHE TEL CO INC COWICHE, WA CWCL 5958 CITIWISE COMMUNICATIONS, L.L.C. SOUTH ORANGE, NJ CWKS 1759 CRAW-KAN TEL COOP INC GIRARD, KS CWLD 7614 RCN LONG DISTANCE COMPANY(PREV PRINCETON, NJ COMMONWEALTH LD) CWLI 6621 CABLE & WIRELESS, INC. VIENNA, VA CWTS 7513 COMMONWEALTH TELECOM SERVICES INC WILKES-BARRE, PA CWTT 0079 CHAZY & WESTPORT TEL CORP WESTPORT, NY CXCM 7596 COAXICOM, INC. NEW YORK, NY CXZX 0863 CITIZENS TEL COOP INC NEW AUBURN, WI CYNC 4241 CYBERNET COMMUNICATIONS, INC. SANTA MONICA, CA CYNL 0436 CENTURY TELEPHONE OF NORTH LA INC MONROE, LA CYPS 8851 CYPRESS TELECOMMUNICATIONS HOUSTON, TX CORPORATION CYRS 5729 CYRIS, LLC VIRGINIA BEACH, VA CYTI CITYNET TELECOM, INC. SILVER SPRINGS, MD CYTN 0687 CLAYTON TEL CO AUGUSTA, MI CYTX 2036 CENTURY TEL OF TEXAS INC TX CYWI 0895 CENTURY TEL OF WISCONSIN INC LACROSSE, WI CZEN 0473 CITIZENS TEL CO BREVARD, NC CZIL USE EC CODE CZUC PLANO, TX CZNS 0081 CITIZENS TEL CO OF HAMMOND NY INC HAMMOND, NY CZUC CITIZENS COMMUNICATIONS DALLAS, TX DAIR DARK AIR CORPORATION WOBURN, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–17 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location DAKC 1799 DAKTEL COMMUNICATIONS, LLC. CARRINGTON, ND DAKT 1652 DAKOTA COOP TELECOM CO INC IRENE, SD DANB 1377 DANUBE TEL CO DANUBE, MN DAQM 8209 DAAQUAM INC TEL DAAQUAM, PQ DARN 0358 DARIEN TEL CO INC DARIEN, GA DAVL 1147 DANVILLE MUTUAL TEL CO DANVILLE, IA DBCI 4952 DIGITAL BROADBAND COMMUNICATIONS WINCHESTER, MA DBSN 1988 DOBSON TEL CO CHEYENNE, OK DCRL 1610 DAKOTA CENTRAL RURAL TEL COOP CARRINGTON, ND DCSL DIGATEL COMMUNICATION SYSTEMS, LLC MAPLEWOOD, NJ DCTR 0451 DECATUR TEL CO INC DECATUR, MS DCVL 0875 DICKEYVILLE TEL CO PLATTEVILLE, WI DEDD D-TEL INC ISLANDIA, NY DELH 0088 DELHI TEL CO DELHI, NY DELL 2066 DELL TEL COOP INC DELL CITY, TX DELT 2184 DELTA COUNTY TELE-COMM INC PAONIA, CO DEPU 0998 DEPUE TEL CO DEPUE, IL DERT 0165 DENVER & EPHRATA TEL & TEL CO EPHRATA, PA DESI 4114 D & E SYSTEMS, INC. EPHRATA, PA DEVY 0086 DELAWARE VALLEY TEL CO NY DFDN 0091 DUNKIRK & FREDONIA TEL CO FREDONIA, NY DFNC 1149 DEFIANCE TEL CO DEFIANCE, IA DFTC DFT LOCAL SERVICE CORPORATION FREDONIA, NY DGCN DIGITAL CONNECTIONS, INC. MORGANTOWN, WV DGSC 8535 DIGITAL SIGNAL COMMUNICATIONS, INC. LACONIA, NH DIGI DIGICOMMUNICATIONS LTD. NEW YORK, NY DIXN 1150 DIXON TEL CO DIXON, IA DKAL 0562 DEKALB TEL COOP ALEXANDRIA, TN DKTN 1153 DUNKERTON TEL COOP DUNKERTON, IA DKTS DAKOTA TELECOMMUNICATIONS SYSTEMS, IRENE, SD INC. DLCM 0428 DELCAMBRE TEL CO DELCAMBRE, LA DLLR 1540 DILLER TEL CO DILLER, NE DLOT DIALALOT.COM, INC. WHITEHOUSE STATION, NJ DLTA 0452 DELTA TEL CO INC LOUISE, MS DLTN 1537 DALTON TEL CO DALTON, NE DLVN 1380 DELAVAN TEL CO DELAVAN, MN DLWR 0087 DELAWARE TEL CO INC NY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–18 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location DMAL 1153 DUNKERTON MUTUAL TEL CO IA DMCG DMI COMMUNICATIONS GROUP, INC. FORT LEE, NJ DMCI 7027 DIAMOND COMMUNICATIONS DALLAS, TX INTERNATIONAL, INC. DMJC 7654 DMJ COMMUNICATIONS, INC. OCLESSA, TX DMNT 1040 DOMINION TELECOM, INC. RICHMOND, VA DMRL 0759 DAVIESS-MARTIN COUNTY RURAL TEL CORP MONTGOMERY, IN DNNL 1381 DUNNELL TEL CO DUNNELL, MN DNPH 1871 DONIPHAN TEL CO MO DNTN 0043 DUNBARTON TEL CO DUNBARTON, NH DODG 0876 DODGE COUNTY TEL CO MADISON, WI DOGG DOMINION GROUP LTD ISLANDIA, NY DPIT 4728 DPI TELECONNECT, LLC DALLAS, TX DPRV 1148 DEEP RIVER MUTUAL TEL CO DEEP RIVER, IA DPST 0089 DEPOSIT TEL CO INC DEPOSIT, NY DRFD 0229 DEERFIELD TEL CO VA DRFL 0691 DEERFIELD FARMERS TEL CO PETERSBURG, MI DRHM 8211 DURHAM TEL LTD MILLBROOK, ON DRMA 1611 DICKEY RURAL TEL COOP ELLENDALE, ND DRMD 0693 DRUMMOND ISLAND TEL CO MI DRNT 0692 DRENTHE TEL CO ZEELAND, MI DRRS 2311 DORRIS TEL CO OR DRRV 1379 DEER RIVER TEL CO INC DEER RIVER, MN DRYD 8210 DRYDEN MUN TEL SYS DRYDEN, ON DS 9210 VERIZON DELAWARE, INC. (PREV BELL PHILADELPHIA, PA ATLANTIC-DEL,INC DSBI DIALOG SMALL BUSINESS ALLIANCE, INC. CHARLOTTE, NC DSCI DSCI CORPORATION BOLTON, MA DSEC DSLNET COMMUNICATIONS, LLC NORWALK, CT DTEL 0987 D-TEL LLC WILMINGTON, DE DTLA DELTA COMMUNICATION NEWARK, NJ DTUR 1699 DECATUR TEL CO DECATUR, AR DUBS 2291 DUBOIS TEL EXCH INC DUBOIS, WY DUCR 2313 DUCOR TEL CO DUCOR, CA DUEL 1654 DEUEL TEL COOP ASSN MN DUMT 1152 DUMONT TEL CO DUMONT, IA DUMY ---- DUMMY-DUMMY HOLD DISC CODES, DUOC 0401 DUO COUNTY TEL COOP INC JAMESTOWN, KY DXVL 0042 DIXVILLE TEL CO DIXVILLE NOTCH, NH

Proprietary — Licensed Material See proprietary restrictions on title page. 12–19 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location DYTW 0609 DOYLESTOWN TEL CO DOYLESTOWN, OH EAGL 2369 EAGLE TEL SYSTEM INC RICHLAND, OR EAMI 1873 EASTERN MISSOURI TEL CO BOWLING GREEN, MO EANE 1542 EASTERN NEBRASKA TEL CO BLAIR, NE EANL EQUAL ACCESS NETWORKS,LLC. WOBURN, MA EAOR 2370 EASTERN OREGON TEL CO OR EASN 0429 EAST ASCENSION TEL CO GONZALES, LA EBCN 1156 EAST BUCHANAN TEL COOP WINTHROP, IA EBNI EVEREST BROADBAND NETWORKS, INC. FORT LEE, NJ ECPS ECONOPHONE SERVICES INC PARAMUS, NJ ECSA 0289 ELMORE-COOSA TEL CO INC ELMORE, AL ECST 0914 EASTCOAST TELECOM INC MADISON, WI EDCN EDGE CONNECTIONS, INC. ATLANTA, GA EDTN 8081 EDMONTON TELEPHONES EDMONTON, AB EDVY 2292 EDEN VALLEY TEL CO FARSON, WY EDWR 0092 EDWARDS TEL CO INC EDWARDS, NY EETI ENERGY EAST TELECOMMUNICATIONS, INC. BINGHAMTON, NY EFXC 9149 EL FENIX TELEPHONE CORP CLIFFSIDE PARK, NJ EGLC 4274 EAGLE COMMUNICATIONS, INC NEW YORK CITY, NY EGPN 1003 EGYPTIAN TEL COOP ASSN STEELEVILLE, IL EGVL 2185 EAGLE TELECOMMUNICATIONS INC EAGLE, CO EGVY 1383 EAGLE VALLEY TEL CO HECTOR, MN EISL ELIZABETH ISLANDS TEL CO WOODS HOLE, MA EKAN EVULKAN, INC. NEW YORK, NY EKHT 1764 ELKHART TEL CO INC ELKHART, KS EKLS 1386 ECKLES TEL CO NEW PRAGUE, MN ELBG 2412 ELLENSBURG TEL CO ELLENSBURG, WA ELBR 0795 ELBERFELD TEL CO INC IN ELCT 2069 ELECTRA TEL CO INC ELECTRA, TX ELJY 0360 ELLIJAY TEL CO ELLIJAY, GA ELMR ELMORE CITY TEL CO OK ELNR 0762 ELNORA TEL CO INC ROACHDALE, IN ELPN 5704 EL PASO NETWORKS, L.L.C. HOUSTON, TX ELPS 1004 EL PASO TEL CO EL PASO, IL ELRB 0478 ELLERBE TEL CO INC ELLERBE, NC ELSI 1544 ELSIE MUTUAL TEL CO ELSIE, NE ELTN 1874 ELLINGTON TEL CO ELLINGTON, MO ELWO 1157 ELLSWORTH COOP TEL ASSN ELLSWORTH, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–20 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location ELYR 0611 ELYRIA TEL CO ELYRIA, OH ELZB 0430 ELIZABETH TEL CO SULPHUR, LA ELZC Z-TEL COMMUNICATIONS, INC. TAMPA, FL EMLY 1387 EMILY COOP TEL CO EMILY, MN EMPE 0361 EMPIRE TEL CO GA EMPR 0093 EMPIRE TEL CORP PRATTSBURG, NY EMRY 2278 EMERY TELEPHONE ORANGEVILLE, UT ENMR 2262 E.N.M.R. TEL COOP INC CLOVIS, NM ENON 0167 ENON VALLEY TEL CO PA ENTR 0168 ENTERPRISE TEL CO NEW HOLLAND, PA ENWD 0563 ENGLEWOOD TEL CO TN EORT 1385 EAST OTTER TAIL TEL CO PERHAM, MN EOTM 7713 EMPIRE ONE TELECOMMUNICATIONS, INC. NEW YORK, NY EPBC ELECTRIC POWER BOARD OF CHATTANOOGA CHATTANOOGA, TN EPCY 2187 EL PASO COUNTY MUTUAL TEL CO COLORADO SPRINGS, CO EPRC 4002 EMPIRE COMMUNICATIONS INC CHARLOTTE, NC EPTI EAST PLAINS TELECOM, INC. BALTIC, SD EQLT 1006 EQUALITY TEL CO INC IL ERCM 4148 ERNEST COMMUNICATIONS, INC NORCROSS, GA ERIC AMERICAN TELECHARGE INC. MULLICA HILL, NJ ERNG 1154 EARLING MUTUAL TEL CO IA ERTC 3053 EAST RIVER TELECOMMUNICATIONS CORP NEW ROCHELLE, NY ERTR 1722 E. RITTER TEL CO MARKED TREE, AR ESCM 8524 ESSEX COMMUNICATIONS, INC. MERRICK, NY ESPC 7280 E.SPIRE COMMUNICATIONS, INC. ANNAPOLIS JUNCTION, MD ESPL 4049 ENHANCED SERVICE PROVIDERS, LLC HANOVER, MA ESRL 2186 EASTERN SLOPE RURAL TEL ASSN INC HUGO, CO ESTN 1384 EASTON TEL CO BLUE EARTH, MN ESTS 1545 EUSTIS TEL EXCH INC BRADY, NE ESTT 2568 EASTERN TELEPHONE, INC. BOSTON, MA ESTX 2068 EASTEX TEL COOP INC HENDERSON, TX ETCC 6149 EAST COAST COMMUNICATIONS RICHMOND, VA ETEX 2070 ETEX TEL COOP INC GILMER, TX ETLD 4539 EASTERN TEL. SYSTEMS INC DBA EASTERN TEL FOR WASHINGTON, PA LONG DIST EUST ECON-O-CALL, INC DBA UNCLE SAM’S TELCOM, NEW YORK, NY INC. EVLN 0434 EVANGELINE TEL CO MONROE, LA EVNS 2315 EVANS TEL CO TURLOCK, CA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–21 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location EVTI EVOICE TELECOM, INC. MENLO PARK, CA EXCC 9010 EXELON COMMUNICATIONS COMPANY, L.L.C. BALA CYNWYD, PA EXCL 2897 EXCEL TELECOMMUNICATIONS, INC. DALLAS, TX EXPC EXPRIMER COMMUNICATIONS, INC. BROOKLYN, NY EXTI EXARIO TELECOM, INC. PARSIPPANY, NJ EXTN 1546 EXTENSION TEL ASSN NE EYPH 8671 EASY PHONE, INC SEA CLIFF, NY EZPI EZ PHONE, INC. AKRON, OH EZTC 8323 EZ TEL CORP DBA MASSACHUSETTS BOSTON, MA WHOLESALE TELEPHONE EZTL EZ-TEL COMMUNICATIONS JACKSONVILLE, FL EZTO 7667 EZ TALK COMMUNICATIONS, LLC STAFFORD, TX FAAR 1172 FARMERS MUTUAL TEL CO NORA SPRINGS, IA FAER 1171 FARMERS MUTUAL TEL CO JESUP, IA FAMT 0362 FAIRMOUNT TEL CO INC FAIRMOUNT, GA FARA 2071 FIVE AREA TEL COOP INC MULESHOE, TX FARB 1876 FARBER TEL CO FARBER, MO FARE 1174 FARMERS MUTUAL TEL CO STANTON, IA FARM 1168 FARMERS MUTUAL COOP TEL CO HARLAN, IA FARS 1173 FARMERS MUTUAL TEL CO SHELLSBURG, IA FBAO 0877 FAIRWATER-BRANDON-ALTO TEL CO BRANDON, WI FBFI FBF INC. NEWARK, NJ FBMS 1160 FARMERS & BUSINESSMEN’S TEL CO WHEATLAND, IA FBNI 4117 FBN AMERICA, INC. DBA FBN INDIANA EMMAUS, PA FBNT FIBERNET EQUAL ACCESS, L.L.C. NEW YORK, NY FCII 7345 FRONTIER COMMUNICATIONS ROCHESTER, NY INTERNATIONAL, INC. FCIN 7965 FACILICOM INTERNATIONAL, LLC WASHINGTON, DC FCLC 7058 FOCAL COMMUNICATIONS CORP CHICAGO, IL FDLT 1882 FIDELITY TEL CO SULLIVAN, MO FDRD 1390 FEDERATED TEL COOP CHOKIO, MN FDTR FEDERAL TRANSTEL, INC. BIRMINGHAM, AL FERS 1176 FARMERS TEL CO ESSEX, IA FETL 4095 FIBERNET, LLC CHARLESTON, WV FETN 1391 FELTON TEL CO INC FELTON, MN FILR 2220 FILER MUTUAL TEL CO FILER, ID FKLN 0053 FRANKLIN TEL CO FRANKLIN, VT FLAL 0291 FLORALA TEL CO FLORALA, AL

Proprietary — Licensed Material See proprietary restrictions on title page. 12–22 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location FLDA FRONTIER COM OF AMERICA INC (PREV ROCHESTER, NY FRONTIER LD) FLRD 0327 FLORIDA TEL COOP FL FLRK 1012 FLAT ROCK TEL CO INC FLAT ROCK, IL FLRN 0453 FLORENCE TEL CO INC MS FLSV 7820 FULL SERVICE COMPUTING CORPORATION PITTSBURGH, PA FLTL FLATEL, INC. WEST PALM BEACH, FL FLTN 0455 FULTON TEL CO INC FULTON, MS FMCN 0694 FARMERS MUTUAL TEL CO OF CHAPIN MI FMCO 1162 FARMERS COOP TEL CO DYSART, IA FMCP 0290 FARMERS TEL COOP INC RAINSVILLE, AL FMCR 0520 FARMERS TEL COOP INC KINGSTREE, SC FMER 1389 FARMERS MUTUAL TEL CO BELLINGHAM, MN FMES 1175 FARMERS TEL CO BATAVIA, IA FMLY 2221 FARMERS MUTUAL TEL CO FRUITLAND, ID FMML 1166 FARMERS & MERCHANTS MUTUAL TEL CO WAYLAND, IA FMTC 1876 F & M TEL CO MO FNMR 0882 FENNIMORE TEL CO MADISON, WI FNRL FONOROLA TORONTO, ON FNTN 1179 FENTON COOP TEL CO FENTON, IA FPTT FORT POINT TELEPHONE COMPANY, INC. BOSTON, MA FRBN 3008 FAIRBANK MUNICIPAL UTILITIES SYSTEM FAIRBANKS, AK FRBR 1393 FREEBORN TEL CO MN FRDL 0292 FRUITDALE TEL CO INC AL FRGC 8469 FREEDOM RING COMMUNICATIONS, LLC DBA PORTSMOUTH, NH BAYRING COMM FRHL 2318 FORESTHILL TEL CO INC FORESTHILL, CA FRLS 7343 FRONTIER LOCAL SERVICE ROCHESTER, NY FRMI 0879 FARMERS INDEPENDENT TEL CO GRANTSBURG, WI FRMM 1169 FARMERS MUTUAL COOP TEL CO MOULTON, IA FRMR 0612 FARMERS MUTUAL TEL CO NEPOLEON, OH FRMS 0880 FARMERS TEL CO LANCASTER, WI FRMY 2188 FARMERS TEL CO INC PLEASANT VIEW, CO FRNK 0454 FRANKLIN TEL CO INC MEADVILLE, MS FRNT FRONTENAC TEL LTEE DISRADI, PQ FRPT 0202 FREEPORT TEL & TEL CO PA FRRC FRONTIER CORPORATION BINGHAM FARMS, MI FRST 1394 FROST TEL CO MN FRTC FIRST REGIONAL TELECOM, LLC WASHINGTON, DC

Proprietary — Licensed Material See proprietary restrictions on title page. 12–23 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location FRUL 0406 FOOTHILLS RURAL TEL COOP CORP STAFFORDSVILLE, KY FSIS 0095 FISHERS ISLAND TEL CORP FISHERS ISLAND, NY FSLC 7741 FIRST LINE COMMUNICATIONS, LLC EGG HARBOR, NJ FSTV 0884 FORESTVILLE TEL CO INC MILWAUKEE, WI FTAT 1182 FT ATKINSON TEL CO IA FTBD 2072 FT BEND TEL CO ROSENBERG, TX FTCL FIRST CHOICE LOCAL COMMUNICATIONS, INC MALVERN, PA FTEL 1177 FARMERS TEL CO RICEVILLE, IA FTGX FIBERNET TELECOM GROUP, INC. NEW YORK, NY FTJN 0614 FT JENNINGS TEL CO FT JENNINGS, OH FTMJ 2200 FORT MOJAVE TELECOMMUNICATIONS NEEDLES, CA FTML 0521 FORT MILL TEL CO FORT MILL, SC FTNJ F. TURNER CORPORATIN, INC. DBA TCS OF ORANGE, NJ NEW JERSEY FTRD 1687 FORT RANDALL TELEPHONE COMPANY CLARA CITY, MN FTRT 7741 FRONTIER TELEMANAGEMENT INC ROCHESTER, NY FTSI 7733 FUTURE TELCOM SERVICES, INC. NEW YORK, NY FTTI 2222 FREMONT TELECOM, CO. 1690 DEL MAR, ID FTVL 0883 FOOTVILLE TEL CO FOOTVILLE, WI FUNK 1551 FUNK TEL CO INC NE FUZI FUZION WIRELESS COMMUNICATIONS, INC. BOCA RATION, FL FWSS FIRST WAY SERVICES HIGHLAND SPRINGS, VA FYVL 0613 FAYETTEVILLE TEL CO FAYETTEVILLE, OH GAND 2076 GANADO TEL CO INC GANADO, TX GARN 2077 GARRISON TEL CO INC TX GBBD GLOBAL BROADBAND, INC. NEW YORK, NY GBLT 1777 GOLDEN BELT TEL ASSN INC RUSH CENTER, KS GBYT GLOBALEYES TELECOMMUNICATIONS, INC. MURPHYSBORO, IL GCBA 0295 GRACEBA TOTAL COMMUNICATIONS ASHFORD, AL GCCS 7728 GE CAPITAL COMMUNICATION SERVICES ATLANTA, GA CORPORATION GCEC CUTTER COMMUNICATIONS, INC DBA GCEC VAN ALSTYNE, TX TECHNOLOGIES GCPT GLOBAL CONNECT PARTNERS, L.L.C. KIRKLAND, WA GCRT 0445 GCR TELECOMMUNICATIONS, INC. SOUTH BOSTON, VA GDFD 1188 GOLDFIELD TEL CO GOLDFIELD, IA GDLP 2083 GUADALUPE VALLEY TEL COOP INC NEW BRAUNFELS, TX GDMN 1886 GOODMAN TEL CO GOODMAN, MO GDRV 1888 GRAND RIVER MUTUAL TEL CO PRINCETON, MO

Proprietary — Licensed Material See proprietary restrictions on title page. 12–24 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location GDVW 1021 GRANDVIEW MUTUAL TEL CO PARIS, IL GEGI THE GERSON GROUP, INC BOSTON, MA GENS 1016 GENESEO TEL CO GENESEO, IL GERG 0364 GEORGIA TEL CORP BLAKELY, GA GFAN GOLDFIELD ACCESS NETWORK, L.L.C. GOLDFIELD, IA GFTN 1020 GRAFTON TEL CO GRAFTON, IL GGNK GILLETTE GLOBAL NETWORK NY, NY GIDT 0618 GERMANTOWN INDEPENDENT TEL CO GERMANTOWN, OH GLAL 0457 GLEN ALLAN TEL CO INC GLEN ALLAN, MS GLAR 2179 GILA RIVER TELECOMMUNICATIONS INC CHANDLER, AZ GLBY 1614 GILBY TEL CO GILBY, ND GLCR 3010 GLACIER STATE TEL CO AK GLDN 1659 GOLDEN WEST TEL COOP INC WALL, SD GLFD 1017 GLASFORD TEL CO GLASFORD, IL GLFT 0329 GULF TEL CO PERRY, FL GLND 0619 GLANDORF TEL CO INC GLANDORF, OH GLOB 5842 GLOBCOM, INC. GLENVIEW, IL GLTC 7900 GLOBAL TELEPHONE CORPORATION BOSTON, MA GLTI 5313 GIANTLOOP TELECOM, INC. WALTHAM, MA GLWD 0365 GLENWOOD TEL CO ATLANTA, GA GMIL 1015 VERIZON NORTH INC (IL) (PREV GTE NORTH .OOMINGTON, IL INC - IL) GMIN 0772 VERIZON NORTH INC (IN) (PREV GTE NORTH FORT WAYNE, IN INC - IN) GMMI 0695 VERIZON NORTH INC (MI) (PREV GTE NORTH MUSKEGON, MI INC - MI) GMMW 4313 VERIZON NORTH INC (PREV GTE NORTH) GRINNELL, IA GMOH 0615 VERIZON NORTH INC (OH) (PREV GTE NORTH MARION, OH INC - OH) GMPA 0169 VERIZON NORTH INC (PA) (PREV GTE NORTH ERIE, PA INC - PA) GMSP 1553 GLENWOOD TEL MEMBERSHIP CORP BLUE HILL, NE GMTI 4732 GREATER MEDIA TELEPHONE, INC. WORCESTER, MA GMTW 0097 GERMANTOWN TEL CO INC GERMANTOWN, NY GMWI NORTH INC - WI SUN PRARIE, WI GNBY 1887 GRANBY TEL CO GRANBY, MO GNHL 1890 GREEN HILLS TEL CORP BRECKENRIDGE, MO GNMA 8212 GOSFIELD NORTH MUN TEL SYS COTTAM, ON GNPS GLOBAL NAPS INC. NORWOOD, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–25 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location GNSN 2279 GUNNISON TEL CO GUNNISON, UT GNST 0039 GRANITE STATE TEL INC WEARE, NH GNVL 1396 GARDONVILLE COOP TEL ASSN BRANDON, MN GNWD 0888 GREENWOOD TEL CO INC MADISON, WI GOLD GOLDTONE COMMUNICATIONS, INC. BROOKLYN, NY GOTH GOTHAM TELEPHONE COMPANY, INC. NEW HYDE PARK, NY GPCS 1577 GREAT PLAINS COMMUNICATIONS INC BLAIR, NE GPNS 1660 GREAT PLAINS TEL CO SD GRAD 1399 GRANADA TEL CO HECTOR, MN GRAG 1535 GRAIG TEL CO NE GRAY 2058 GARY TEL CO TX GRCL 1057 GALLATIN RIVER COMMUNICATIONS L.L.C CHAPEL HILL, NC GRDL 1023 GRIDLEY TEL CO GRIDLEY, IL GRGS 1615 GRIGGS COUNTY TEL CO COOPERSTOWN, ND GRHM 1778 GORHAM TEL CO INC GORHAM, KS GRMD 1191 GRAND MOUND COOP TEL ASSN GRAND MOUND, IA GRNB 0036 GRANBY TEL & TEL CO GRANBY, MA GRND 1994 GRAND TEL CO INC JAY, OK GRNT 0930 GRANTLAND TELECOM INC MADISON, WI GRRT 0770 GARRETT TEL CO INC IN GRSW 1195 GRISWOLD COOP TEL CO GRISWOLD, IA GRTG 1189 GRAETTINGER COOP TEL ASSN IA GRTT GRANITE TELECOMMUNICATION LLC QUINCY, MA GRTW 0456 GEORGETOWN TEL CO LAKESVILLE, MS GRVL GROVELINE, LLC. BOCA RATON, FL GRVS 2373 GERVAIS TEL CO GERVAIS, OR GRVY 1395 GARDEN VALLEY TEL CO ERSKINE, MN GRWD GARWOOD TEL CO TX GSCI GREEN STATE COMMUNICATIONS, INC. EAST ORANGE, NJ GSHN 0296 GOSHEN TEL CO GOSHEN, AL GSUS 2223 GEM STATE UTILITIES CORP CHENEY, WA GTAK 3009 GTE ALASKA INC ANCHORAGE, AK GTCA 2319 VERIZON CALIFORNIA INC (PREV GTE THOUSAND OAKS, CA CALIFORNIA) GTDA 5603 GLOBAL TELDATA, INC. CHICAGO, IL GTDS INVALID - DO NOT USE * GTEC GTE TELOPS - CENTRAL AREA IRVING, TX GTEN GTE TELOPS-NORTH AREA WESTFIELD, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 12–26 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location GTER 7646 VERIZON SELECT SERVICES INC (PREV GTE IRVING, TX CARD ....) GTES GTE TELOPS-SOUTH AREA TAMPA, FL GTEW GTE TELOPS-WEST AREA THOUSAND OAKS, CA GTEX GTE TELEPHONE OPERATIONS IRVING, TX GTFL 0328 VERIZON FLORIDA INC (PREV GTE FLORIDA TAMPA, FL INC) GTIL 1015 GENERAL TEL CO OF ILLINOIS BLOOMINGTON, IL GTIN 0772 GENERAL TEL CO OF INDIANA FORT WAYNE, IN GTKY 0407 GENERAL TEL CO OF KENTUCKY KY GTMI 0695 GENERAL TEL CO OF MICHIGAN MI GTMW 1186 GENERAL TEL CO OF THE MIDWEST IA GTND 1447 CONTEL OF NORTH DAKOTA DBA GTE ND ST. PAUL, MN GTNW 2416 VERIZON NORTHWEST INC (PREV GTE EVERETT, WA NORTHWEST INC) GTOH 0615 GENERAL TEL CO OF OHIO OH GTPA 0169 GENERAL TEL CO OF PENNSYLVANIA ERIE, PA GTSA INVALID - DO NOT USE * GTSD 1643 CONTEL OF SOUTH DAKOTA INC DBA GTE SD ST. PAUL, MN GTSE 0479 VERIZON SOUTH INC (PREV GTE SOUTH INC) DURHAM, NC GTSW 2080 GTE SOUTHWEST INC SAN ANGELO, TX GTVL 0771 GEETINGSVILLE TEL CO INC FRANKFORT, IN GTWI 0886 GENERAL TEL CO OF WISCONSIN WI GULF 0298 GULF TEL CO FOLEY, AL GVHL 0297 GROVE HILL TEL CORP BAY SPRINGS, MS GVMT 8213 GUEVREMONT INC LE TEL STE ROSALIE, PQ GWCI 1643 GOLDEN WEST COMMUNICATIONS, INC. WALL, SD GWSI G.W.S.,INC. (SUB GOLDEN WEST WALL, SD TELECOMMUNICATIONS) GWTL GATEWAY TELECOM, LLC WHEELING, WV HANC 0099 HANCOCK TEL CO HANCOCK, NY HANS HAINES TEL CO OR HART 0368 HART TEL CO HARTWELL, GA HAXT 2190 HAXTUN TEL CO WISNER, NE HBCS 1781 H & B COMMUNICATIONS INC HOLYROOD, KS HBRD 1203 HUBBARD COOP TEL ASSN HUBBARD, IA HCCY 0174 HUNTINGDON & CENTRE COUNTY TEL PA HCGI HOOKS COMMUNICATIONS GROUP, INC. FALLS CHURCH, VA HCKR 0171 HICKORY TEL CO AUGUSTA, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 12–27 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location HCNL 0403 HOOD CANAL TEL CO INC DBA HOOD CANAL UNION, WA COMM. HCNY 2086 HILL COUNTRY TEL COOP INC INGRAM, TX HDLY 0698 HADLEY TEL CO INC MARION, LA HDWT 0891 HEADWATERS TEL CO RHINELANDER, WI HELX 2376 HELIX TEL CO HELIX, OR HENS 0481 HEINS TEL CO SANFORD, NC HESG 0524 HEATH SPRINGS TEL CO HEATH SPRINGS, SC HGCY 0889 HAGER CITY TEL CO HAGER CITY, WI HGHS 0459 HUGHES TEL CO INC BAILEY, MS HGLD 0100 FRONTIER COMM OF NEW YORK, INC (PREV MONROE, NY HIGHLAND TEL) HGND 0237 HIGHLAND TEL COOP MONTEREY, VA HHMN 1407 HOHMAN TEL CO PELICAN RAPIDS, MN HILD 2417 HAT ISLAND TEL CO LANGLEY, WA HILL HILLS TEL CO INC MN HILS 1405 HILLS TEL CO INC DELL RAPIDS, SD HINT 1995 HINTON TEL CO OF HINTON OK INC HINTON, OK HKML 8215 HURON & KINLOSS MUN TEL SYS RIPLEY, ON HLBO 0892 HILLSBORO TEL CO INC HILLSBORO, WI HLDL 0700 HILLSDALE COUNTY TEL CO MI HLND 0565 HIGHLAND TEL COOP INC SUNBRIGHT, TN HLST 1401 HALSTAD TEL CO HALSTAD, MN HLWY 1929 HOLWAY TEL CO MARION, LA HMEY 1408 HOME TEL CO GRAND MEADOW, MN HMFR 1558 HEMINGFORD COOP TEL CO HEMINGFORD, NE HMGY 0140 HILLSBOROUGH & MONTGOMERY TEL CO NJ HMIL 1024 HAMILTON COUNTY TEL COOP DAHLGREN, IL HMNE 1562 HOME TEL CO OF NEBRASKA BRADY, NE HMNL 8214 HAY MUN TEL SYS ZURICH, ON HMPD 0010 HAMPDEN TEL CO HAMPDEN, ME HMPH 0566 HUMPHREYS COUNTY TEL CO NEW JOHNSONVILLE, TN HMTN 1555 HAMILTON TEL CO AURORA, NE HNCK 1403 HANCOCK TEL CO HANCOCK, MN HNPN HENNEPIN TEL CO OK HNRY 1029 HENRY COUNTY TEL CO GENESEO, IL HNSC 1661 HANSON COUNTY TEL CO ALEXANDRIA, SD HNSN 1559 HENDERSON COOP TEL CO HENDERSON, NE HNVL 1026 HARRISONVILLE TEL CO WATERLOO, IL

Proprietary — Licensed Material See proprietary restrictions on title page. 12–28 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location HOEM 0527 HOME TEL CO INC MONCKS CORNER, SC HOEY 1032 HOME TEL CO ST JACOB, IL HOKS 2089 HOOKS TEL CO INC TX HOME 1782 HOME TEL CO INC GALVA, KS HOMX 0458 HOME TEL CO HARDY, AK HOMZ 2377 HOME TEL CO MADISON, WI HOOM 0778 HOME TEL CO INC WALDRON, IN HOPR 1563 HOOPER TEL CO HOPPER, NE HORY 0528 HORRY TEL COOP INC CONWAY, SC HPBO 0777 HOME TEL CO OF PITTSBORO PITTSBORO, IN HPPR 0300 HOPPER TEL CO ALTOONA, AL HPRS 1202 HOSPERS TEL EXCH INC HOSPERS, IA HRDN 1025 HARDIN COUNTY TEL CO IL HRDY 0259 HARDY TEL CO LOST RIVER, WV HRGY 0523 HARGRAY TEL CO INC HILTON HEAD ISL, SC HRLD 0408 HAROLD TEL CO INC HAROLD, KY HRLN 0620 HARLAN TEL CO PLEASANT PLAIN, OH HRMY 1404 HARMONY TEL CO HARMONY, MN HRNT 2322 HORNITOS TEL CO STOCKTON, CA HRRL 0775 HANCOCK RURAL TEL CORP MAXWELL, IN HRSH 1561 HERSHEY COOP TEL CO HERSHEY, NE HRTI 1109 HEARTLAND TELECOMMUNICATIONS MANKATO, MN COMPANY OF IOWA HRTL 0160 HEARTLAND COMMUNICATIONS, INC(SUB KIMBALL, SD MIDSTATE) HRTM 0889 HAGAR TELECOM INC HAGER CITY, WI HRTR 8216 HURONTARIO TELEPHONES LTD THEDFORD, ON HSAS 0011 HARTLAND & ST. ALBANS TEL CO HARTLAND, ME HSNC 1116 HANSON COMMUNICATIONS INC DBA MCCOOK SALEM, SD TELECOM HTCC HOMETOWN CABLEVISION CORPORATION SOUTH DAYTON, NY HTCO 3100 VERIZON HAWAII INC (PREV GTE HAWAIIAN HONOLULU, HI TEL CO INC) HTIA 1297 HEART OF IOWA TEL COOP UNION, IA HTMN 1557 HARTMAN TEL EXCH INC DANBURY, NE HTNT 1556 HARTINGTON TEL CO HARTINGTON, NE HTSN 1409 HUTCHINSON TEL CO HUTCHINSON, MN HTSP 2241 HOT SPRINGS TEL CO HOT SPRINGS, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 12–29 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location HTVT 7188 HYPERION TELECOMMUNICATIONS OF WILLISTON, VT VERMONT HVDN HUDSON VALLEY DATANET LLC. MONTGOMERY, NY HVLD 1780 HAVILAND TEL CO INC HAVILAND, KS HVLY 2321 HAPPY VALLEY TEL CO STOCKTON, CA HVNT 8828 HARVARD NET INC PORTLAND, ME HWDW 0171 HICKORY TEL CO HICKORY, PA HWKY 1199 HAWKEYE TEL CO HAWKEYE, IA HWTH 0713 HIAWATHA TEL CO MUNISING, MI HWVL 0369 HAWKINSVILLE TEL CO HAWKINSVILLE, GA HXLY 1205 HUXLEY COOP TEL CO HUXLEY, IA HYDR 1999 HYDRO TEL CO OK HYPT 7129 HYPERION TELECOMMUNICATIONS INC PITTSBURGH, PA HYVL 0299 HAYNEVILLE TEL CO INC HAYNEVILLE, AL IAMO 1206 IAMO TEL CO COIN, IA IANK IOWA NETWORK SERVICES INC WEST DES MOINES, IA IATC 8248 IOWA TELECOM COMMUNICATIONS, INC. NEWTON, IA IATG 7896 INTERNATIONAL TELEPHONE GROUP, INC. MORRISTOWN, NJ IATS IOWA TELECOMMUNICATIONS SERVICES, INC. NEWTON, IA ICGF INTERCONTINENTAL COMMUN. GROUP DBA FT. LAUDERDALE, FL FUSION TELECOM ICGL 7150 ICG TELECOM GROUP DENVER, CO ICMY 1616 INTER-COMMUNITY TEL CO NOME, ND ICTY INTER-COUNTY TEL CO MO ICUC I.C.U.C. , INC. NORTH BELLMORE, NY IDST 5739 IDS TELCOM MIAMI, FL IDTO IDT CORPORATION NEWARK, NJ IENL 7895 INTERNATIONAL EXCHANGE NETWORKS, LTD. NEW YORK, NY IETL 7485 INTERNATIONAL TELCOM, LTD SEATTLE, WA IGBI INTERGLOBE COMMUNICATIONS STATEN ISLAND, NY IHSY 8509 PRODESIGN CORP. DBA INTERACTIVE HOME CONCORD, MA SYSTEMS IINI 2935 INTERACTIVE INFORMATION NETWORK, INC. SYOSSET, NY ILCD 1037 ILLINOIS CONSOLIDATED TEL CO MATTOON, IL ILLI ILLICOM TELECOMMUNICATIONS, INC. PAXTON, IL IMCM 2623 INTER MOUNTAIN CABLE DBA MIKROTEC HAROLD, KY COMMUNICATIONS IMTN 2243 INTERMOUNTAIN TEL & POWER CO MT INBL 2242 INTERBEL TEL COOP INC EUREKA, MT

Proprietary — Licensed Material See proprietary restrictions on title page. 12–30 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location INDS 2093 INDUSTRY TEL CO INDUSTRY, TX INHD 0936 INDIANHEAD TEL CO WEYERHAUSER, WI INLC INLEC COMMUNICATIONS, INC. PHILADELPHIA, PA INLD 2423 INLAND TEL CO ROSLYN, WA INLN 1038 INLAND TEL CO CHAMPAIGN, IL INTI 7716 INTEGRATED TELETECHNOLOGIES INC. D/B/A NEW YORK, NY ITELECOM INTR 3011 INTERIOR TEL CO INC ANCHORAGE, AK INTS 0159 INTRASTATE TELEPHONE CO.,INC(SUB- CLEAR LAKE, SD INTERSTATE TELE) INTW 0331 INDIANTOWN TEL SYSTEM INDIANTOWN, FL IRLD 2422 INTER-ISLAND TEL CO FRIDAY HARBOR, WA IRQS 0101 IROQUOIS TEL CORP NY IRTC INTERACTIVE COMMUNICATIONS SYSTEMS, BLACKWOOD, NJ INC. IRTN 0175 IRONTON TEL CO COPLAY, PA ISAD 0007 ISLAND TEL CO FRENCHBORO, ME ISLD 8087 ISLAND TEL CO LTD THE CHARLOTTETOWN, PE ISNA 7095 INTELNET SERVICES OF NORTH AMERICA, INC. WEST BERLIN, NJ ISND 0677 ISLAND TEL CO BEAVER ISLAND, MI ISPU 7093 INTERNATIONAL DESIGN GROUP DBA USA DANIA, FL TELECOM ITFE 1209 INTERSTATE 35 TEL CO TRURO, IA ITMC 7149 INTERMEDIA COMMUNICATIONS INC. TAMPA, FL ITSC 2761 INTEGRATED TELEPHONE SERVICES WAYNE, NJ CORPORATION ITSE 0371 INTERSTATE TEL CO WEST POINT, GA ITST 1654 INTERSTATE TELECOM COOP INC CLEAR LAKE, SD IWLC IWL CONNECT, INC. HOUSTON, TX JAGC JAGUAR COMMUNICATIONS, INC. OWATONNA, MN JATO 2862 JATO OPERATING CORP DENVER, CO JATT 2936 JATO OPERATING TWO CORP. DENVER, CO JATV 3541 JATO COMMUNICATIONS CORP. OF VIRGINIA DENVER, CO JBNT 1785 J.B.N. TEL CO INC WETMORE, KS JDLS 3012 JUNEAU & DOUGLAS TEL CO AK JFRN 1666 JEFFERSON TEL CO JEFFERSON, SD JFSN 1212 JEFFERSON TEL CO JEFFERSON, IA JHSN 1410 JOHNSON TEL CO REMER, MN JNIC JONES INTERCABLE ALEXANDRIA, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–31 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location JSCI 7320 JANE STREET COMMUNICATIONS, INC NEW YORK, NY JSVY 1213 JORDAN SOLDIER VALLEY COOP TEL CO SOLDIER, IA JTCC 4277 JTC COMMUNICATIONS, INC. LOUISVILLE, KY JTMR 1786 JETMORE TEL CO KS JUBT JUBILEE TELECOM, L.L.C. UPPER SADDLE RIVER, NJ JVLY 1664 JAMES VALLEY COOP TEL CO GROTON, SD KACC 9688 KAC COMMUNICATIONS COMPANY EAST ORANGE, NJ KADK 1667 KADOKA TEL CO KADOKA, SD KALD 0625 KALIDA TEL CO INC KALIDA, OH KALM 2426 KALAMA TEL CO KALAMA, WA KALN 1214 KALONA COOP TEL CO KALONA, IA KARR 1567 KEYSTONE-ARTHUR TEL CO KEYSTONE, NE KCII 7735 KCI LONG DISTANCE, INC. SYRACUSE, NY KEND 0924 KENDALL TELEPHONE INC KENDALL, WI KFRS 1217 KEYSTONE FARMS COOP TEL CO KEYSTONE, IA KGSL 0705 KINGSLEY TEL CO KINGSLEY, MI KLMT 1900 K L M TEL CO RICH HILL, MO KLSB 1214 KALONA COOP SWITCHBOARD CO IA KLVA 0703 KALEVA TEL CO KALEVA, MI KMAS 2280 KAMAS-WOODLAND TEL CO KAMAS, UT KMCV 6086 KMC TELECOM OF VIRGINIA, INC BEDMINSTER, NJ KMPT 1413 K M P TEL CO KERKHOVEN, MN KMTC 1565 K & M TEL CO CHAMBERS, NE KMVL 1412 KASSON & MANTORVILLE TEL CO KASSON, MN KNBC 1668 KENNEBEC TEL CO KENNEBEC, SD KNDM 1901 KINGDOM TEL CO AUXVASSE, MO KNIP 2099 KNIPPA TEL CO KNIPPA, TX KNKL 1788 KANOKLA TEL ASSN ANTHONY, KS KNMN 1041 KINSMAN MUTUAL TEL CO KINSMAN, IL KNRA 8218 KENORA MUN TEL SYS KENORA, ON KPLN 0432 KAPLAN TEL CO KAPLAN, LA KRMN 2324 KERMAN TEL CO KERMAN, CA KRNK 2095 KARNAK TEL CO TX KRSR 0045 KEARSARGE TEL CO NEW LONDON, NH KRVL 2097 KERRVILLE TEL CO KERRVILLE, TX KSCM K & S COMMUNICATIONS CHAMPLAIN, NY KSST 1789 KANSAS STATE TEL CO GARDNER, KS KTKN 3013 KETCHIKAN PUBLIC UTILITIES KETCHIKAN, AK

Proprietary — Licensed Material See proprietary restrictions on title page. 12–32 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location KTZB 3019 KOTZEBUE TEL COOP AK KWYD 8217 KEEWATIN MUN TEL SYS KEEWATIN, ON KYKL 6166 KEYSTONE KALLING, INC. PHILADELPHIA, PA LABA 8236 LA BAIE DU FEBVRE SOCIETE DE TEL BAIEVILLE, PQ LAKE 2104 LAKE LIVINGSTON TEL CO LIVINGSTON, TX LAMT 1222 LA MOTTE TEL CO LA MOTTE, IA LARC LA REPUBLICA COMMUNICATIONS NORTH BRUNSWICK, NJ LARL 1223 LAUREL TEL CO INC LAUREL, IA LAVC 1704 LAVACA TEL CO LAVACA, AR LAWN 0442 LOUISIANA WESTERN TEL CO MONROE, LA LB 9329 ILLINOIS BELL TEL CO CHICAGO, IL LBCT 0784 LIBERTY CENTER TEL CO WARREN, IN LBRT 1706 LIBERTY TEL CO MONROE, LA LBTI 8854 LBC TELEPHONY, INC. PARSIPPANY, NJ LBTN 8219 LAMBTON INC LA CIE DE TEL LAMBTON, PQ LBVA LIGHTBONDING.COM VA INC. CHANTILLY, VA LCFB 7880 LOCAL FIBER, LLC ROCHESTER, NY LCII 7560 LCI INTERNATIONAL TELECOM CORP MCLEAN, VA LCIN LAMBDA COMMUNICATIONS, INCORPORADO SAN JUAN, PR LCKW 0177 LACKAWAXEN TEL CO ROWLAND, PA LCLK 7971 LEC-LINK ANTIOCH, TN LCLN 2351 LINCOLN COUNTY TEL SYSTEM INC PIOCHE, NV LCMS 1705 LIBERTY TEL & COMMUNICATIONS INC MONROE, LA LCMY 1232 LYNNVILLE COMMUNITY TEL CO INC LYNNVILLE, IA LDLE 1414 LAKEDALE TEL CO ANNANDALE, MN LDLW 0058 LUDLOW TEL CO LUDLOW, VT LDMS 7711 LDM SYSTEMS INC. 254 S. MAIN STREET, NY LECO 2264 LEACO RURAL TEL COOP INC LOVINGTON, NM LEDS 0302 LEEDS TEL CO LEEDS, AL LEGH 1225 LEHIGH VALLEY COOP TEL ASSN LEHIGH, IA LEMH 2225 LEMHI TEL CO ID LENR 1046 LEONORE MUTUAL TEL CO TONICA, IL LERU 1908 LE-RU TEL CO STELLA, MO LESL 0411 LESLIE COUNTY TEL CO HYDEN, KY LEVY LEVY ASSOCIATES INC. BROOKLYN, NY LFCH 0433 LAFOURCHE TEL CO LAROSE, LA LFKN 2109 LUFKIN-CONROE TEL EXCH INC LUFKIN, TX LGNI LOOKING GLASS NETWORKS, INC. ADDISON, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 12–33 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location LGNR 0783 LIGONIER TEL CO INC LIGONIER, IN LGOA LOG ON AMERICA, INC. PROVIDENCE, RI LGST 4303 LIGHTSOURCE TELECOM I, LLC. TOLEDO, OH LGVI 8306 LE GROUPE VIDEOTRON ITEE DALLAS, TX LHLD 0179 LAUREL HIGHLAND TEL CO STAHSTOWN, PA LHLN 2244 LINCOLN TEL CO INC LINCOLN, MT LHRP 1791 LA HARPE TEL CO INC LA HARPE, KS LINE LINE SYSTEMS, INC BROOMALL, PA LINR LINN RUAL TEL CO KS LIPN 2105 LIPAN TEL CO LIPAN, TX LITC 8289 LONG ISLAND TELEPHONE COMPANY GREAT NECK, NY LJRL 2263 LA JICARITA RURAL TEL COOP INC MORA, NM LKDL 2101 LAKE DALLAS TEL CO LAKE DALLAS, TX LKFD 0896 LAKEFIELD TEL CO NEWTON, WI LKML 1221 LAKE MILLS TEL CO IA LKRT 0532 LOCKHART TEL CO INC LOCKHART, SC LKSC 0102 LAKESIDE COMMUNICATIONS, INC. ROCKLAND, ID LKSD 1011 LAKESIDE TEL CO CHAMPAIGN, IL LKSE 2102 LAKESIDE TEL CO TX LKSH 0858 LAKESHORE TEL CO CECIL, WI LKTI LAKER TELECOMMUNICATIONS CORPORATION ANDOVER, NJ LKWD 0178 LAKEWOOD TEL CO BARNESVILLE, PA LLAI LOCAL LINE AMERICA, INC. AKRON, OH LMCC 0613 LITTLE MIAMI COMMUNICATIONS CORP FAYETTEVILLE, OH LMWR 0900 LEMONWEIR VALLEY TEL CO CAMP DOUGLAS, WI LNCL 1568 LINCOLN TEL & TEL CO LINCOLN, NE LNCS 0531 LANCASTER TEL CO LANCASTER, SC LNDL 1422 LONSDALE TEL CO INC LONSDALE, MN LNED 1229 LOST NATION-ELWOOD TEL CO LOST NATION, IA LNNE 6186 LINEONE LLC WEST HARTFORD, CT LNON 0708 LENNON TEL CO LENNON, MI LNRK 1228 LONE ROCK COOP TEL CO LONE ROCK, IA LNSD 8220 LANSDOWNE RURAL TEL CO LTD LANSDOWNE, ON LNSI 5449 ALTERNATE NETWORK SOLUTIONS, INC. ROTTERDAM JUNCTION, NY LNVC 8933 LINCOLNVILLE COMMUNICATIONS, INC. LINCOLNVILLE, ME LNVL 0003 LINCOLNVILLE TEL CO LINCOLNVILLE, ME LOAC INTERNAL TELCORDIA USE LOGN 0413 LOGAN TEL COOP INC AUBURN, KY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–34 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location LORE 1443 LORETEL SYSTEMS INC ADA, MN LPCY 1220 LA PORTE CITY TEL CO LA PORTE CITY, IA LPPP APPLECOM LTD ISLANDIA, NY LRCT 0301 LAMAR COUNTY TEL CO MILLPORT, AL LRPE 1043 LAHARPE TEL CO LAHARPE, IL LRSN 0898 LARSEN-READFIELD TEL CO MILWAUKEE, WI LRTT 0570 LORETTO TEL CO INC LORETTO, TN LRVR 2427 LEWIS RIVER TEL CO INC LA CENTER, WA LRVY 1045 LEAF RIVER VALLEY TEL CO LEAF RIVER, IL LSID 0457 LAKESIDE TEL CO INC GLEN ALLAN, MS LSMR 1419 LISMORE COOP TEL CO LISMORE, MN LSPT 0180 LEESPORT TEL CO PA LTHP 1932 LATHROP TEL CO PRINCETON, MO LTPT LIGHTSHIP TELECOM, L.L.C. NASHUA, NH LTRV 1809 MUTUAL TEL CO LITTLE RIVER, KS LTTC LOCAL TELCOM HOLDINGS, LLC DBA CALABASAS, CA TRANSPOINT COMMUN. LUCK 0902 LUCK TEL CO LUCK, WI LVLC LEVEL 3 COMMUNICATIONS, LLC LOUISVILLE, CO LVLE 0899 LA VALLE TEL COOP LA VALLE, WI LVSN 2107 LIVINGSTON TEL CO LIVINGSTON, TX LWBY 0181 LEWISBERRY TEL CO DALLAS, PA LWCL LIGHTWAVE COMMUNICATIONS, LLC LAUREL, MD LWPT 0412 LEWISPORT TEL CO INC LEWISPORT, KY LWRD 2103 LA WARD TEL EXCH INC LAWARD, TX LWRY 1423 LOWRY TEL CO LOWRY, MN LXTN 0483 LEXINGTON TEL CO LEXINGTON, NC MABL 1424 MABEL COOP TEL CO MABEL, MN MADL 1425 MADELIA TEL CO MADELIA, MN MADN 1049 MADISON TEL CO HAMEL, IL MANT 2282 MANTI TEL CO MANTI, UT MAPL 0907 MAPLE TEL COOP INC MAPLE, WI MAQS 0908 MARQUETTE-ADAMS TEL COOP INC OXFORD, WI MAWI 8602 MAW INC FLEETWOOD, PA MB 9323 MICHIGAN BELL TEL CO DETROIT, MI MBDG 1671 MOBRIDGE TELECOMMUNICATIONS CO(SUB HAZEN, ND WEST RIVER) MBNE 0485 MEBANE HOME TEL CO INC MEBANE, NC MCAT 1231 MESCALERO APACHE TELECOM, INC. MESCALERO, NM

Proprietary — Licensed Material See proprietary restrictions on title page. 12–35 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location MCCK 1669 MCCOOK COOP TEL CO SALEM, SD MCCR 0598 MCCLURE TEL CO MCCLURE, OH MCDD 1912 MCDONALD COUNTY TEL CO PINEVILLE, MO MCDG 1047 MCDONOUGH TEL COOP COLCHESTER, IL MCDN 2430 MCDANIEL TEL CO SALKUM, WA MCGC MCGRAW COMMUNICATIONS, INC. NEW YORK, NY MCHV 1241 MECHANICSVILLE TEL CO MECHANICSVILLE, IA MCIM 7229 MCIMETRO ACCESS TRANSMISSION SERVICES, VIENNA, VA INC MCLD 2006 MCLOUD TEL CO OKLAHOMA CITY, OK MCMA 7882 METCOM ACCESS INC PLAINVIEW, NY MCMB 0103 MACOMB NY MCNB 1048 MCNABB TEL CO MCNABB, IL MCNT 0788 MERCHANTS & FARMERS TEL CO HILLSBORO, IN MCNY 1054 MID CENTURY TEL COOP INC CANTON, IL MCRE 0305 MON-CRE TEL COOP INC RAMER, AL MCRL 0914 MOSEL & CENTERVILLE TEL CO MADISON, WI MCRT 7634 MICROTEL COMMUNICATIONS CORP. NEW YORK, NY MCSN 0915 MOSINEE TEL CO MOSINEE, WI MCTS 1427 MANKATO CITIZENS TEL CO MANKATO, MN MDAC 2010 MID-AMERICA TEL INC STONEWALL, OK MDBG 0105 MIDDLEBURGH TEL CO MIDDLEBURGH, NY MDCC MIDCO COMMUNICATIONS, INC. SIOUX FALLS, SD MDCL 0504 MID-CAROLINA TEL CO NC MDCN 1375 MID-COMMUNICATIONS INC MANKATO, MN MDGA 0357 MID-GEORGIA TEL CORP GA MDHC 7989 MID-HUDSON COMMUNICATIONS, INC. CATSKILL, NY MDIA 1187 MID-IOWA TEL CO GILMAN, IA MDIN 0831 MID INDIANA TEL CORP IN MDIS 1801 MADISON TEL CO INC MADISON, KS MDLK 2227 MUDLAKE TEL COOP ASSN INC DUBOIS, ID MDLN 0904 MADELINE ISLAND TEL CO CARNEY, MI MDMC 7539 MIDCOM COMMUNICATIONS INC.(LOGICALL, SEATTLE, WA ATN, TELENAT) MDMI MID-MICHIGAN TEL CORP MI MDMO 1917 MID-MISSOURI TEL CO PILOT GROVE, MO MDNT CAPITAL REGION HEALTHCARE CORPORATION CONCORD, NH DBA MEDNET MDOH MID OHIO TEL CORP NEWARK, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 12–36 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location MDPK 2008 MEDICINE PARK TEL CO MEDICINE PARK, OK MDPS 1251 MEDIAPOLIS TEL CO MEDIAPOLIS, IA MDSC 1709 MADISON COUNTY TEL CO INC HUNTSVILLE, AR MDTC 3335 MODERN TELECOMMUNICATIONS COMPANY GREEN CITY, MO MDTT 1433 MID-STATE TEL CO TX MDVL 2226 MIDVALE TEL EXCH INC MIDVALE, ID MDWN 2009 MIDWESTERN TEL CO INC OK MDWS 1431 MIDWEST TEL CO PARKERS PRAIRIE, MN MDWY 0711 MIDWAY TEL CO WATTON, MI MEAN MINNESOTA EQUAL ACCESS NETW SVCS INC PLYMOUTH, MN MEGR MEG RADIO NEWARK, NJ MEHN 1237 MARNE & ELK HORN TEL CO ELK HORN, IA METR 7729 METRACOM CORPORATION BOSTON, MA MFNS 6099 METROMEDIA FIBER NETWORK SERVICES INC WHITE PLAINS, NY MFRS 0235 MERCHANTS AND FARMERS TEL CO VA MFSI METROPOLITAN FIBER SYSTEMS INC OAKBROOK TERRACE, IL MFSL 7445 MFS INTELENET OF WASHINGTON, D.C., INC. WESTMONT, IL MFST 7108 MFS TELECOM, INC. DENVER, CO MGCC 7050 MPOWER COMMUN CORP(PREV MGC LAS VEGAS, NV COMMUN, INC) MGCI MEGSINET-CLEC, INC. CHICAGO, IL MGCL 3203 MEGACLEC, INC. FALL RIVER, MA MGCM MEGA COMM LLC ROSELLE, NJ MGTL 7553 MEGATEL, CORPORATION QUEENS VILLAGE, NY MGTN 0571 MILLINGTON TEL CO INC MILLINGTON, TN MGWL 0238 MGW TELEPHONE CO INC WILLIAMSVILLE, VA MGZN 1710 MAGAZINE TEL CO MAGAZINE, AR MHGM 0702 MICHIGAMA TEL CO MI MHNT 7677 MANHATTAN TELECOMM CORP DBA NEW YORK, NY METROPOLITAN TELECOMM MHOM 1711 MOUNTAIN HOME TEL CO INC MONROE, LA MHRD 1426 MANCHESTER-HARTLAND TEL CO MANCHESTER, MN MIDS 1670 MIDSTATE TEL CO KIMBALL, SD MIDT 1060 MOULTRIE INDEPENDENT TEL CO LOVINGTON, IL MIDW 0188 MIDWAY MUTUAL TEL CO PA MILR 1243 MILLER TEL CO GARNER, IA MILS 1242 MILES COOP TEL ASSN MILES, IA MILT 8221 MILOT INC TEL ST PAULIN, PQ

Proprietary — Licensed Material See proprietary restrictions on title page. 12–37 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location MJDT 8931 FAIRPOINT COMMUNICATIONS CORP (PREV CHATHAM, NY MJD TELECHOICE MKDL 1807 MO-KAN DIAL INC LOUISBURG, KS MKLK 3016 MUKLUK TEL CO INC TELLER, AK MLBY 0792 MULBERRY COOP TEL CO INC MULBERRY, IN MLEI 1402 M & L ENTERPRISES, INC. MIDVALE, ID MLHR 2456 MALHEUR HOME TEL CO ONTARIO, OR MLLL 2383 MOLALLA TEL CO MOLALLA, OR MLLR 1920 MILLER TEL CO INC MILLER, MO MLND 1055 MIDLAND TEL CO CHAMPAIGN, IL MLRS 1430 MELROSE TEL CO MELROSE, MN MLRY 0304 MILLRY TEL CO MILLRY, AL MLTC 7390 MASSACHUSETTS LOCAL TELEPHONE DORCHESTER, MA COMPANY, INC MLTW 0910 MILLTOWN MUTUAL TEL CO MILLTOWN, WI MLVL 0533 MCCLELLANVILLE TEL CO INC MCCLELLANVILLE, SC MMGO MMT GORI, INC. MONONGAHELA, PA MMSN 1250 MUTUAL TEL CO OF MORNING SUN MORNING SUN, IA MMTG 0183 MAHANOY & MAHANTANGO TEL CO HERNDON, PA MMTL 3315 MID-MAINE TELECOM BANGOR, ME MMTP MID-MAINE TELPLUS DBA MID-MAINE ME COMMUNICATIONS MNBN 1245 MINBURN TEL CO MINBURN, IA MNBW 2294 MEDICINE BOW TEL CO INC MEDICINE BOW, WY MNBY 0462 MOUND BAYOU TEL AND COMMUNICATIONS BAY SPRINGS, MS INC MNCC 8304 AT&T CANADA, INC (PRE METRONET COMM. CALGARY, AB CORP.) MNDV 0912 MONDOVI TEL CO MONDOVI, WI MNFR 0634 MINFORD TEL CO MINFORD, OH MNGT 8223 MORNINGTON MUN TEL SYS MILVERTON, ON MNIL 8222 MANITOULIN ISLAND TEL CO LTD MINDEMOYA, ON MNLK 1437 MINNESOTA LAKE TEL CO MINNESOTA LAKE, MN MNLL 1235 MANILLA TEL CO MANILLA, IA MNOT 1624 MINOT TELEPHONE COMPANY MINOT, ND MNRG 1808 MOUNDRIDGE TEL CO MOUNDRIDGE, KS MNRO 0913 MONROE COUNTY TEL CO MILWAUKEE, WI MNRV 0791 MONROVIA TEL CORP IN MNSG 0713 MUNISING TEL CO MI

Proprietary — Licensed Material See proprietary restrictions on title page. 12–38 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location MNST 2116 MUENSTER TEL CORP OF TEXAS MUENSTER, TX MNTR 2384 MONITOR COOP TEL CO WOODBURN, OR MNTT MONMOUTH TELEPHONE AND TELEGRAPH, RED BANK, NJ INC. MNVL 0307 MOUNDVILLE TEL CO MOUNDVILLE, AL MNVY 1439 MINNESOTA VALLEY TEL CO INC FRANKLIN, MN MNWA 0905 MANAWA TEL CO INC MANAWA, WI MOAP 2353 MOAPA VALLEY TEL CO OVERTON, NV MODN 1247 MODERN COOP TEL CO SOUTH ENGLISH, IA MONN 0790 MONON TEL CO INC MONON, IN MONR 2385 MONROE TEL CO MONROE, OR MORI 1904 MISSOURI TEL CO COLUMBIA, MO MOTC 7772 MEDIAONE TELECOMMUNICATIONS CORP JACKSONVILLE, FL MOVL 0306 MONROEVILLE TEL CO MONROEVILLE, AL MPHM 0633 MIDDLE POINT HOME TEL CO MIDDLE POINT, OH MPLS 0881 MID-PLAINS TEL INC MIDDLETON, WI MPNN 0176 MID PENN TEL CORP PA MPRL 2112 MID-PLAINS RURAL TEL COOP INC TULIA, TX MRDN 0046 MERIDEN TEL CO MERIDEN, NH MRDV 0189 MURDOCKSVILLE IND TEL CO (NAME CHANGE) PA MRGV 0104 MARGARETVILLE TEL CO INC MARGARETVILLE, NY MRLB 1622 MOORE & LIBERTY TEL CO ENDERLIN, ND MRLY 1249 MORLEY TEL CO MORLEY, IA MRMC 0047 MERRIMACK COUNTY TEL CO CONTOOCOOK, NH MRNC 0712 MORENCI HOME TEL CO MI MROT METRO ONE TELECOM BEAVERTON, OR MRSL 1050 MARSEILLES TEL CO OF MARSEILLES METAMORA, IL MRSY 0185 MARIANNA-SCENERY HILL TEL CO MARIANNA, PA MRTL 1238 MARTELLE COOP TEL ASSN MARTELLE, IA MRTM 8089 MARITIME TEL & TEL CO LTD HALIFAX, NS MRUL 0414 MOUNTAIN RURAL TEL COOP CORP INC WEST LIBERTY, KY MRVS 2246 MID-RIVERS TEL COOP INC CIRCLE, MT MS 9636 MOUNTAIN BELL DENVER, CO MSAT 1617 MIDSTATE TEL CO STANLEY, ND MSCK 0710 MESICK TEL CO MI MSHL 2431 MASHELL TEL CO INC EATONVILLE, WA MSPI 0461 MISSISSIPPI TEL CORP MS MSSN 1239 MASSENA TEL CO MASSENA, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–39 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location MSTC 0462 MISSISSIPPI TEL & COMM INC MS MSTE 1433 MID STATE TEL CO SPICER, MN MSTH 0460 MID-SOUTH TEL CO INC RIENZI, MS MSTN 2117 MUSTANG TEL CO MONROE, LA MSTT 0160 USE EC CODE ADNY JAMESTOWN, NY MSYS 8088 MANITOBA TEL SYS WINNIPEG, MB MTAN 2386 MT ANGEL TEL CO MT ANGEL, OR MTCI 8358 MOMENTUM TELECOM INC SAN RAFAEL, CA MTCM 7804 TDS METROCOM, INC MADISON, WI MTCO MTCO COMMUNICATIONS, INC METAMORA, IL MTHB 0916 MT HOREB TEL CO MT HOREB, WI MTMO 1053 METAMORA TEL CO METAMORA, IL MTNS 0270 USE EC CODE CZUC HUNDREDWN, WV MTNT 3185 MOUNTAINET TELEPHONE COMPANY GATE CITY, VA MTPS 1061 MT PULASKI TEL & ELEC CO LINCOLN, IL MTRL 1914 MARK TWAIN RURAL TEL CO HURDLAND, MO MTRM 1660 MT RUSHMORE TEL CO KEYSTONE, SD MTRS 1058 MONTROSE MUTUAL TEL CO DIETERICH, IL MTSK 3015 MATANUSKA TEL ASSN INC PALMER, AK MTTC METRO TELECONNECT, INC GAITHERSBURG, MD MTTL MOUNTAIN TELECOMMUNICATIONS INC TEMPE, AZ MTTM METROPOLITAN TELECOMMUNICATIONS MANHATTAN, NY MTUL 1251 MUTUAL TEL CO OF MEDIAPOLIS IA MTVW 1712 MOUNTAIN VIEW TEL CO MOUNTAIN VIEW, AR MTZM 1248 MONTEZUMA MUTUAL TEL CO MONTEZUMA, IA MUTL 1252 MUTUAL TEL CO SIOUX CENTER, IA MUTY 3014 MANLEY UTILITY CO AK MUVL 0190 MURRAYSVILLE TEL CO EXPORT, PA MVLE 1246 MINERVA VALLEY TEL CO INC ZEARING, IA MVRN 0917 MT VERNON TEL CO MADISON, WI MVXC MVX.COM COMMUNICATIONS, INC NOVATO, CA MWAY 0909 MIDWAY TEL CO MADISON, WI MWGI 2525 MILLENNIUM WIRELESS GROUP, INC. WOODBURG, NY MWST 1431 MIDWEST TEL CO MI MXWL 2266 MAXWELL TEL EXCH NM MYTL 0449 MYRTLE TEL CO INC HARDY, AK MZCO MEZCO, LLC. ADAMS, MA MZPP 1429 MAZEPPA TEL CO MN

Proprietary — Licensed Material See proprietary restrictions on title page. 12–40 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location NACC NORTH AMERICAN COMMUNICATIONS NEW YORK, NY CONTROL, INC. NACI NORTH AMERICAN COMMUNICATIONS, INC. WYOMING, PA NACS 8945 NA COMMUNICATIONS, INC ABINGDON, VA NANT 8224 NANTES INC LA CIE DE TEL LAMBTON, PQ NASS NETWORK ACCESS SOLUTIONS STERLING, VA NATL 7206 NORTH AMERICAN TELECOMMUNICATIONS UNIONDALE, NY NAVJ 4449 USE EC CODE CZUC ST MICHAELS, AZ NAVT 2604 NAVIGATOR TELECOMMUNICATIONS, LLC NORTH LITTLE ROCK, AR NB 9325 INDIANA BELL TEL CO INDIANAPOLIS, IN NBGD 0375 NELSON-BALL GROUND TEL CO NELSON, GA NBRS 1573 NE TEL CO NE NBWK 8090 NEW BRUNSWICK TEL CO LTD THE SAINT JOHN, NB NCCC 8293 NORTH COUNTY COMMUNICATIONS CORP. SAN DIEGO, CA NCNA 2121 NOCONA TEL CO TX NCNI NORFOLK COUNTY INTERNET, INC. FRANKLIN, MA NCRY 3026 NORTH COUNTRY TEL CO EAGLE, AK NCTL 0573 NORTH CENTRAL TEL COOP INC LAFAYETTE, TN NCVA NET2000 COMMUNICATIONS OF VIRGINIA 2195 FOX MILL RD, HERNDON, VA NCVL 0108 NICHOLVILLE TEL CO INC NICHOLVILLE, NY NDKT 1447 NORTH DAKOTA TEL CO DEVILS LAKE, ND NDSL NATIONAL DIGITAL SUBSCRIBER LINE.COM. HICKSVILLE, NY INC. NDTC 1447 THE NORTH DAKOTA PHONE COMPANY INC NE 9102 VERIZON NEW ENGLAND (PREV NEW ENGLAND BOSTON, MA TEL & TEL CO NEBC 1527 NEBCOM, INC. JACKSON, NE NECE 1574 NEBRASKA CENTRAL TEL CO GIBBON, NE NEEC 2640 NET-TEL CORPORATION WASHINGTON, DC NEES 8703 NEW WORLD PHONE SERVICE, INC. NORRISTOWN, PA NEFL 0335 NORTHEAST FLORIDA TEL CO INC MACCLENNY, FL NEIA 1230 NORTHEAST IOWA TEL CO MONONA, IA NELA 0435 NORTHEAST LOUISIANA TEL CO INC COLLINSTON, LA NEMO 1931 NORTHEAST MISSOURI RURAL TEL CO GREEN CITY, MO NENE 1576 NORTHEAST NEBRASKA TEL CO JACKSON, NE NENG 1257 NORTH ENGLISH COOP TEL CO NORTH ENGLISH, IA NENI 2830 NEW EDGE NETWORK, INC. VANCOUVER, WA NEON 7333 NORTHEAST OPTIC NETWORK INC WESTBOROUGH, MA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–41 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location NEPA 0191 NORTH EASTERN PENNSYLVANIA TEL CO FOREST CITY, PA NESN 1577 NORTHEASTERN TEL CO NE NETC 5493 NETCARRIER TELECOM, INC. LANSDALE, PA NETS 7799 ENERGY RESEARCH GROUP DBA NORTHEAST NEWTON, PA TEL SERVICES NEVD 2354 USE EC CODE CZUC ELKO, NV NFLD 8085 NEWFOUNDLAND TEL CO LTD ST JOHN’S, NF NFRC 8225 NORTH FRONTENAC TEL CO SHARBOT LAKE, ON NFTI 4606 NEW FRONTIERS TELECOMMUNICATIONS, HAGERSTOWN, MD INC. NGIT 8867 NTEGRITY TELECONTENT SERVICES, INC. BALTIMORE, MD NHLM 2387 NEHALEM TEL & TEL CO NEHALEM, OR NHPE 0308 NEW HOPE TEL COOP NEW HOPE, AL NHST 2388 NORTH-STATE TEL CO MT VERNON, OR NIGR 0920 NIAGARA TEL CO NIAGARA, WI NJ 9206 NEW JERSEY BELL TEL CO NEWARK, NJ NJSY 0141 NJ TEL CO NJ NKTE 4396 NETWORK TELECOM EXCHANGE CORP EASTON, PA NKVE 0639 NEW KNOXVILLE TEL CO NEW KNOXVILLE, OH NLAL 0286 NATIONAL TEL CO OF ALABAMA MONROE, LA NLEC NECLEC, LLC HINGHAM, MA NLNW 7556 NORTHLAND NETWORKS UTICA, NY NLOL 7847 NATIONAL COMMUNICATIONS, LLC MILWAUKEE, WI NLSN 0918 NELSON TEL COOP DURAND, WI NLTC 8694 NEW LINE TELEPHONE AND HINGHAM, MA COMMUNICATIONS COMPANY, INC NMAD 1625 NORTHWEST MUTUAL AID TEL CORP ND NMBC 3454 NATIONAL MOBILE COMMUNICATIONS S. BURLINGTON, UT CORPORATION NMCC 8774 NEW MILLENNIUM COMMUNICATIONS CORP MIAMI, FL NMNT 2247 NEMONT TEL COOP INC SCOBEY, MT NNET NEWCOMM NET, INC. FREDERICK, MD NNRT 2193 NUCLA-NATURITA TEL CO NUCLA, CO NNRW 8226 NORTH NORWICH MUN TEL SYS BURGESSVILLE, ON NOAR 1713 NORTHERN ARKANSAS TEL CO FLIPPIN, AR NOCT 1256 NORTH CENTRAL TEL CO IA NOFL 0335 NORTH FLORIDA TEL CO FL NOIA 1259 NORTHERN IOWA TEL CO SIOUX CENTER, IA NOMI 4251 NORCOM, INC. BOCA RATON, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 12–42 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location NONN 1623 NOONAN FARMERS TEL CO NOONAN, ND NOPA 0192 NORTH PENN TEL CO PRATTSBURG, NY NORT 1500 NORTHERN TEL CO OF MINNESOTA WAWINA, MN NOSC 7519 NOS COMMUNICATIONS INC LAS VEGAS, NC NOTH 1578 NORTHERN TEL CO NE NOVA 0644 NOVA TEL CO NOVA, OH NOWC 7771 NOW COMMUNICATIONS, INC. JACKSON, MS NOWE 2249 NORTHWESTERN TEL SYSTEMS INC KALISPELL, MT NOWS 0922 NORTH-WEST TEL CO TOMAH, WI NOXP 0461 NOXAPATER TEL CO INC LEAKSVILLE, MS NPBH 0193 NORTH PITTSBURG TEL CO GIBSONIA, PA NPCM 7137 AT&T CORP. (PREV NORTHPOINT COMM, INC.) SAN FRANCISCO, CA NRFD 0061 NORTHFIELD TEL CO NORTHFIELD, VT NRFW 8227 NORTH RENFREW TEL CO LTD BEACHBURG, ON NRLD 1445 NORTHLAND TEL CO HILL CITY, MN NRMN 1443 NORMAN COUNTY TEL CO INC ADA, MN NRRL 1262 NORWAY RURAL TEL CO KANAWHA, IA NRST 0938 NORTHEAST TEL CO PULASKI, WI NRTN 8228 NORTHERN TEL LTD NEW LISKEARD, ON NRWT 8092 NORTHWESTEL INC WHITEHORSE, YT NRWY 0535 NORWAY TEL CO INC NORWAY, SC NSGK 3018 NUSHAGAK TEL COOP INC DILLINGHAM, AK NSPR 1624 NORTHERN STATES POWER CO TEL DEPT MINOT, ND NSTE 0491 NORTH STATE TEL CO HIGH POINT, NC NSTT NUSTAR TELEPHONE CO. INC. ATLANTA, GA NTCA NATIONAL TELEPHONE COOPERATIVE WASHINGTON, DC ASSOCIATION (NTCA) NTCT NTCNET TELECOM INC NEWPORT, NY NTEI 9656 NATIONAL TELEPHONE EXCHANGE, INC. HARRISBURG, PA NTEL 8852 NTEL GERMANTOWN, MD NTHW 1261 NORTHWEST TEL COOP ASSN HAVELOCK, IA NTLC NET-TEL COMMUNICATIONS WASHINGTON, DC NTNL 3017 NATIONAL UTILITIES INC PORT TOWSEND, WA NTOM 3316 NORTHLAND TELEPHONE OF MAINE, INC. PORTLAND, ME NTRN 2248 NORTHERN TEL COOP INC SUNBURST, MT NTRV 0236 NORTH RIVER TEL COOP DAYTON, VA NTSR NETSTREAM ROSEVILLE, CA NTST 7483 NEW TELCO, L.P. DBA SPRINT TELECOM. KANSAS CITY, MO VENTURE

Proprietary — Licensed Material See proprietary restrictions on title page. 12–43 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location NTTC 2043 NORTH TEXAS TEL CO BYERS, TX NUNN 2194 NUNN TEL CO NUNN, CO NUPS NUTEL PHONE SERVICE, INC. NORRISTOWN, PA NURL 1442 NEW ULM TELECOM INC NEW ULM, MN NV 9742 NEVADA BELL RENO, NV NVAL 4051 CONVERSENT COMM. LLC(PREV NEW PROVIDENCE, RI ENGLAND VOICE DATA) NVLY 1929 NODAWAY VALLEY TEL CO MO NVST NOVUS TELECOM, INC VANCOUVER, BC NVYS 0924 NOVY’S TEL CO KENDALL, WI NW 9631 NORTHWESTERN BELL OMAHA, NE NWCC 1625 NORTHWEST COMMUNICATIONS COOP RAY, ND NWCS 3029 NEW CASTLE TELEPHONE CO NEW CASTLE, VA NWFL 1927 NEW FLORENCE TEL CO INC NEW FLORENCE, MO NWHP 0239 NEW HOPE TEL CO NEW HOPE, VA NWIA 1260 NORTHWEST IOWA TEL CO INC SARGEANT BLUFF, IA NWIN 0800 NORTHWESTERN INDIANA TEL CO INC HEBRON, IN NWLA 0436 NORTHWEST LOUISIANA TEL CO INC MONROE, LA NWLN 1928 NEW LONDON TEL CO NEW LONDON, MO NWLS 0796 NEW LISBON TEL CO INC NEW LISBON, IN NWPR 0797 NEW PARIS TEL INC NEW PARIS, IN NWPS 7648 NETWORK PLUS INC QUINCY, MA NWPT 0107 NEWPORT TEL CO INC NEWPORT, NY NWTS 2382 NORTHWESTERN TEL SYSTEMS INC LEBANON, OR NWWN 1062 NEW WINDSOR TEL CO NEW WINDSOR, IL NXAZ 4793 NEXTLINK ARIZONA, INC. BELLEVUE, WA NXCA 7262 NEXTLINK OF CALIFORNIA SANTA ANA, CA NXDC 8964 NEXTLINK, D.C., INC WASHINGTON, DC NXDE 4124 NEXTLINK DELAWARE, INC WYOMISSING, PA NXFL 6100 NEXTLINK FLORIDA INC. MIAMI, FL NXGA 8758 NEXTLINK GEORGIA, INC. SMYRNA, GA NXGT NEXTGEN TELEPHONE, INC. MOUNT SINAI, NY NXIL 7056 NEXTLINK ILLINOIS, INC. OAKBBROOK, IL NXMA 4536 NEXTLINK MASSACHUSETTS, INC CAMBRIDGE, MA NXMD 4773 NEXTLINK MARYLAND, LLC WYOMISSING, PA NXMI 4125 NEXTLINK MICHIGAN, INC. BELLEVUE, WA NXMO 4774 NEXTLINK MISSOURI, INC. BELLEVUE, WA NXNJ 4123 NEXTLINK NEW JERSEY, INC NEWARK, NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 12–44 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location NXNV 7521 NEXTLINK NEVADA, LLC HENDERSON, NV NXNY 8340 NEXTLINK NEW YORK, L.L.C. NEW YORK, NY NXOH 7520 XO OHIO, INC (PREV NEXTLINK OHIO) COLUMBUS, OH NXPA XO PENNSYLVANIA, INC (PREV NEXTLINK PA) WYOMISSING, PA NXPR 0464 NOXAPATER TEL CO INC BAY SPRINGS, MS NXTN 7344 XO TENNESSEE, INC (PREV NEXTLINK NASHVILLE, TN TENNESSEE) NXTX 8958 NEXTLINK TEXAS, INC. DALLAS, TX NXVA 4772 NEXTLINK VIRGINIA, LLC FAIRFAX, VA NXWA 7340 NEXTLINK WASHINGTON, L.L.C. SPOKANE, WA NY 9104 VERIZON NEW YORK INC (PREV NEW YORK TEL NEW YORK, NY CO) NYCT 7958 NEW YORK COIN TELEPHONE CO., INC. SAN ANTONIO, TX NYLT NEW YORK LOCAL TELEPHONE, INC. KNOXVILLE, TN NYTI 7003 NEW YORK TELECONNECT, INC. HARRISBURG, PA NYTL 9263 NEW YORK TELSAVE, INC. NEW YORK, NY OAKW 0645 OAKWOOD MUTUAL TEL CO OAKWOOD, OH OALL 7022 ONSITE ACCESS LOCAL LLC NEW YORK, NY OB 9321 OHIO BELL TEL CO CLEVELAND, OH OBVA 3149 OPENBAND OF VIRGINIA, INC. CHANTILLY, VA OCIC 7908 OVATION COMMUNICATIONS, INC (PREV OCI 401 SECOND AVENUE COMM.) SOUTH, MN OCRL 0111 ONEIDA COUNTY RURAL TEL CO HOLLAND PATENT, NY OCTY 0019 OXFORD COUNTY TEL & TEL CO BUCKFIELD, ME ODIN 1065 ODIN TEL EXCH INC ODIN, IL ODMM 0714 OGDEN TEL CO BISSFIELD, MI ODNL O’DONNELL TEL CO INC TX OFRM 1934 ORCHARD FARM TEL CO ST CHARLES, MO OGDN 1263 OGDEN TEL CO OGDEN, IA OGEN 0110 OGDEN TEL CO OF NEW YORK SPENCERPORT, NY OJVC OBJECTIVE COMMUNICATIONS, INC PORTSMOUTH, NH OKAT 2011 OKLAHOMA ALLTEL INC LITTLE ROCK, AR OKCN 1984 OKLAHOMA COMMUNICATION SYSTEM INC CHOCTAW, OK OKLH 2013 OKLAHOMA TEL & TEL INC DUSTIN, OK OKMN 0311 OAKMAN TEL CO INC LEESBURG, AL OKST OKLAHOMA STATE TEL CO OK OKWE 2014 OKLAHOMA WESTERN TEL CO CLAYTON, OK OLDI ONESTAR LONG DISTANCE, INC EVANSVILLE, IN OLIN 1264 OLIN TEL CO INC OLIN, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–45 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location OMCC OMC COMMUNICATIONS, INC. BETHESDA, MD OMTP 0801 ODON TEL CO ODON, IN ONAC ONSITE ACCESS, LLC NEW YORK, NY ONCS 8229 ONTARIO NORTHLAND TRANS COMSN NORTH BAY, ON ONED 1066 ONEIDA TEL EXCH ONEIDA, IL ONNT 0312 ONEONTA TEL CO INC ONEONTA, AL ONSL 1265 ONSLOW COOP TEL ASSN ONSLOW, IA ONTN 0717 ONTONAGON COUNTY TEL CO ONTONAGON, MI ONTR 0112 ONTARIO TEL CO INC PHELPS, NY OOCD 0574 OOLTEWAH-COLLEGEDALE TEL CO CHICKAMAUGA, GA OPGC 8978 OPTIMUM GLOBAL COMMUNICATIONS, INC SPRINGFIELD, MA ORAN 1266 ORAN MUTUAL TEL CO ORAN, IA ORCY 0337 ORANGE CITY TEL CO FL ORFL 0114 ORISKANY FALLS TEL CORP ORISKANY FALLS, NY ORGE 1935 OREGON FARMERS MUTUAL TEL CO OREGON, MO ORGN 2389 OREGON TEL CORP MT VERNON, OR ORID 2390 OREGON-IDAHO UTILITIES INC SAN FRANCISCO, CA ORIN 1067 ORION TEL EXCH ASSN ORION, IL ORWL 0649 ORWELL TEL CO ORWELL, OH OSCL 9830 ONESTAR COMMUNICTIONS, LLC. EVANSVILLE, IN OSKS 1448 OSAKIS TEL CO PARKERS PRAIRIE, MN OSWY 0194 OSWAYO RIVER TEL CO SHINGLEHOUSE, PA OTEL OTEL TELEKOM, INC. MANCHESTER, NH OTNB 8230 OTONABEE TEL LTD MILBROOK, ON OTTO 0195 OTTO TEL CO INC BUTLER, PA OTVL 0650 OTTOVILLE MUTUAL TEL CO OTTOVILLE, OH OTZT 3019 OTZ TEL COOP INC KOTZKBUE, AK OUTC OUTSIDE CONNECTION, INC. ROCKVILLE CENTRE, NY OVCI 5124 ONE VOICE COMMUNICATIONS, INC. ASHBURN, VA OWYC ONE WAY COMMUNICATIONS, INC. SOMERS PT, NJ OWYH 2229 OWYHEE TEL CO ID OXNW OXFORD COUNTY TELE. SERVICE CO DBA BUCKFIELD, MA OXFORD NETWORKS OZAT AZARK TELEPHONE COMPANY SENECA, MO PA 9208 VERIZON PENNSYLVANIA INC (PREV BELL PHILADELPHIA, PA ATLANTIC PA) PABG 1275 PRAIRIEBURG TEL CO INC PARIRIEBURG, IA PALO 1269 PALO COOP TEL ASSN PALO, IA PANR 1271 PANORA COOP TEL ASSN INC PANORA, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–46 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location PARM 0719 PARMA TEL CO MI PATH PATH ENTERPRISES, INC UNION, NJ PBLT 0315 PINE BELT TEL CO INC ARLINGTON, AL PBRL 1451 PAUL BUNYAN RURAL TEL COOP BEMIDJI, MN PBTC PBT COMMUNICATIONS, INC GILBERT, SC PBUC 0723 PUBLIC SERVICE TEL CO MI PCSI 4346 PHOENIX COMMUNICATIONS SOLUTIONS, INC WEST NEW YORK, NJ PCSS 7676 PREFERRED CARRIER SERVICES DALLAS, TX PCTY 0937 PRICE COUNTY TEL CO PHILLIPS, WI PCVY 1936 PEACE VALLEY TEL CO PEACE VALLEY, MO PDRV 2198 PINE DRIVE TEL CO BEULAH, CO PELS 2391 PEOPLES TEL CO LYONS, OR PENN 0197 PENNSYLVANIA TEL CO JERSEY SHORE, PA PEOL 1453 PEOPLES TEL CO BIGFORK, MN PEOP 0930 PEOPLES TEL CO (BLOOMINGTON) MADISON, WI PEPL 1814 PEOPLES MUTUAL TEL CO LA CYGNE, KS PEPS 1273 PEOPLES TEL CO AURELIA, IA PETL 4766 PELL-TEL INC. BLOOMFIELD, NJ PETZ 2196 PEETZ COOP TEL CO PEETZ, CO PFST 8231 PEOPLE’S TEL CO OF FOREST LTD FOREST, ON PGEN 0721 PIGEON TEL CO PIGEON, MI PGRG 0233 PRINCE GEO TEL CO VA PGSS 0380 PROGRESSIVE RURAL TEL COOP INC RENTZ, GA PGWS PUGWASH RIVER MUTUAL TEL CO PUGWASH, NS PHDL 2016 PANHANDLE TEL COOP INC GUYMON, OK PHLK 8601 PHONE-LINK, INC LAGRANGE, KY PHLP 2197 PHILLIPS COUNTY TEL CO HOLYOKE, CO PHMG PHONE MICHIGAN GRANDVILLE, MI PHNK 7640 PHOENIX NETWORK, INC. GOLDEN, CO PIER 1817 PIONEER TEL ASSN INC ULYSSES, KS PINE 2392 PINE TEL SYSTEM HALFWAY, OR PINR 2393 PIONEER TEL COOPERATIVE PHILOMATH, OR PINX 2017 PINE TEL CO BROKEN BOW, OK PIRC 1581 PIERCE TEL CO PIERCE, NE PIVL 0494 PINEVILLE TEL CO PINEVILLE, NC PJCT 2231 PROJECT MUTUAL TEL COOP ASSN INC RUPERT, ID PKSV 0062 PERKINSVILLE TEL CO PERKINSVILLE, VT PLAN 2199 PLAINS COOP TEL ASSN INC JOES, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 12–47 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location PLCN 1452 PELICAN TEL CO MN PLDN 0437 PLAIN DEALING TEL CO INC MONROE, LA PLEC 5630 PACLEC CORPORATION LEBANON, PA PLES 1672 PEOPLES TEL & TEL CO SD PLGT PILGRIM TELEPHONE, INC. CAMBRIDGE, MA PLMR 1270 PALMER MUTUAL TEL CO PALMER, IA PLMT 0536 PALMETTO RURAL TEL COOP INC WALTERBORO, SC PLNT 0378 PLANTERS RURAL TEL COOP INC NEWINGTON, GA PLPN 2127 PALO PINTO TEL CO TX PLRL 2131 POKA-LAMBRO TEL COOP INC TAHOKA, TX PLTN 1818 PLEASANTON TEL CO KS PLVW 1582 PLAINVIEW TEL CO INC PLAINVIEW, NE PMBK 0243 PEMBROKE TEL COOP PEMBROKE, VA PMBP 0497 PIEDMONT TEL MEMBERSHIP CORP LEXINGTON, NC PMBR 0376 PEMBROKE TEL CO INC PEMBROKE, GA PMDC PMC DIRECT CORP ISLANDIA, NY PMLK 6112 PRIMELINK, INC. CHAMPLAIN, NY PMTN 0196 PALMERTON TEL CO PALMERTON, PA PN 9638 PACIFIC NORTHWEST BELL SEATTLE, WA PNBH 0539 POND BRANCH TEL CO INC GILBERT, SC PNCL 2346 PINNACLES TEL CO PAICINES, CA PNER 2018 PIONEER TEL COOP INC KINGFISHER, OK PNIS 1454 PINE ISLAND TEL CO HECTOR, MN PNLD 0377 PINELAND TEL COOP INC METTER, GA PNRS 2332 PONDEROSA TEL CO O’NEALS, CA PNSC 2270 PENASCO VALLEY TEL COOP INC ARTESIA, NM PNSI PREMIERE NETWORK SERVICES, INC. DESOTO, TX PNSL 0720 PENINSULA TEL CO TRAVERSE CITY, MI PNTM 8596 PENN TELECOM, INC GIBSONIA, PA PNTR 0020 PINE TREE TEL & TEL CO GRAY, ME PNUL 2436 PENINSULA TELECOMMUNICATIONS INC FORKS, WA POII Save for Lois, CLLI Ad Hoc POLR 1630 POLAR COMMUN MUTUAL AID CORP PARK RIVER, ND POLS 0931 PEOPLES TEL CO RANDOLPH, WI PONR 2437 PIONEER TEL CO LA CROSSE, WA POPL 0244 PEOPLES MUTUAL TEL CO GRETNA, VA POPS 2130 PEOPLES TEL COOP QUITMAN, TX POVL 0809 POSEYVILLE TEL CO INC POSEYVILLE, IN

Proprietary — Licensed Material See proprietary restrictions on title page. 12–48 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location POWL 0577 POWELL TEL CO TN PPLL 2129 PEEPLES TEL CO SUGAR LAND, TX PPLS 0576 PEOPLES TEL CO INC ERIN, TN PPLT 2249 PACIFIC POWER & LIGNT CO MT PPLX 0314 PEOPLES TEL CO INC LEESBURG, AL PPNE BROADRIVER COMM OF THE NORTHEAST CORP ALPHARETTA, GA (PREV..) PPPL 4884 PRE-PAID PHONES, LTD LAS VEGAS, NV PPVA BROADRIVER COMM OF VA CORP (PREV ALPHARETTA, GA PUREPACKET - VA) PPWR 0379 PLANT TEL CO TIFTON, GA PRAM PHONE RECONNECT OF AMERICA, LLC PORT ST LUCIE, FL PRAR 1073 PRAIRIE TEL CO CHAMPAIGN, IL PRCA 3200 PUERTO RICO COMMUNICATIONS CORP SAN JUAN, PR PRCO 1717 PERCO TEL CO PERRYVILLE, AR PRCT PRECONNECTION, INC. ELIZABETH, NJ PRES 0266 PRESTON TEL CO WV PRGV 1718 PRAIRIE GROVE TEL CO PRAIRIE GROVE, AR PRJT 2250 PROJECT TEL CO INC SCOBEY, MT PRML 1450 PARK REGION MUTUAL TEL CO UNDERWOOD, MN PRNS PREFERRED NETWORK SOLUTIONS, INC. VALLEY STREAM, NY PRRE 1344 PRAIRIE TEL CO INC BREDA, IA PRRL 0538 PIEDMONT RURAL TEL COOP INC LAURENS, SC PRRT 8082 PRINCE RUPERT CITY TELEPHONES PRINCE RUPERT, BC PRSC 2439 PRESCOTT TEL & TEL CO WA PRTN 0811 PRINCETON TEL CO OF PRINCETON INDIANA IN PRUI BELL-EAST COMPANY INC. (PREV PRE-TELL BAYSHORE, NY COMMUN) PRUL 0415 PEOPLES RURAL TEL COOP CORP MCKEE, KY PRXR PREXAR, LLC ELLSWORTH, ME PSRL 0807 PERRY-SPENCER RURAL TEL COOP INC ST MEINRAD, IN PSTN 1276 PRESTON TEL CO PRESTON, IA PSVC 0381 PUBLIC SERVICE TEL CO REYNOLDS, GA PSVL 0116 PATTERSONVILLE TEL CO ROTTERDAM JUNC, NY PT 9740 PACIFIC BELL SAN FRANCISCO, CA PTBG 1580 PETERSBURG TEL CO PETERSBURG, NE PTBY 0118 PORT BYRON TEL CO PORT BYRON, NY PTCH 2230 POTLATCH TEL CO INC KENDRICK, ID PTEC 4029 PAETEC COMMUNICATIONS FAIRPORT, NY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–49 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location PTHN PATHNET, INC WASHINGTON, DC PTIC 2360 PACIFIC TELECOM INC LEBANON, OR PTRN 3201 PUERTO RICO TEL CO SAN JUAN, PR PTRV 0651 PATTERSONVILLE TEL CO CARROLLTON, OH PTTN 0000 PTT NETHERLANDS HAGUE, HD PTUA 2173 PAPAGO TRIBAL UTILITY AUTH. SELLS, AZ PTVL 0934 PLATTEVILLE TEL CO DBA PTI PLATTEVILLE, WI COMMUNICATIONS PTWM 2020 POTTAWATOMIE TEL CO EARLSBORO, OK PUMI PARAMOUNT COMMUNICATIONS INC. RALEIGH, NC PUPC BROADRIVER COMM CO (PREV PUREPACKET ALPHARETTA, GA COMM, INC) PUPS BROADRIVER COMMUNICATION CORP ALPHARETTA, GA (PUREPACKET - SOUTH) PUTA 2173 PAPAGO TRIBAL UTILITY AUTHORITY SELLS, AZ PVLL 1274 POSTVILLE TEL CO DBA PTI COMMUNICATIONS POSTVILLE, IA PVTN 2662 PVT NETWORKS, INC. ARTESIA, NM PWRL 0813 PULASKI-WHITE RURAL TEL COOP INC STAR CITY, IN PXUT 8686 PAYLEXX UTILITIES & TELEC SERVICES OF LONG ISLAND CITY, NY AMERICA PYMT 0200 PYMATUNING INDEP TEL CO GREENVILLE, PA QAKR 0201 QUAKER STATE TEL CO HERSHEY, PA QLSC QUALSTAR COMMUNICATIONS, INC. DEFIANCE, OH QLTT QUALITY TELECOM INC PLAINVIEW, NY QMDA QMEDIA, INC. NEW YORK, NY QNCY 0338 QUINCY TEL CO QUINCY, FL QNMT 2596 QUANTUM TELECOMMUNICATIONS, INC. MANCHESTER, MD QTEL QTEL, INC. DALLAS, TX QTXC QUANTREX COMMUNICATIONS, INC. VIRGINIA BEACH, VA QUAT 1646 QUALITY TELEPHONE DALLAS, TX QUBC 8083 QUEBEC-TEL RIMOUSKI, PQ RANG 2251 GENERAL RANGE TEL COOP INC FORSYTH, MT RBCS R & B COMPUTER SYSTEMS, INC. QUEENS VILLAGE, NY RBLK 0941 RIB LAKE TEL CO RHINELANDER, WI RBLT 1721 RICE BELT TEL CO WEINER, AR RBNI 7185 R & B NETWORK, INC. DALEVILLE, VA RBRT 1674 ROBERTS COUNTY TEL COOP ASSN NEW EFFINGTON, SD RBTL ROBTEL INC. EAST ROCHESTER, NY RBTT 0249 ROANOKE & BOTETOURT TEL CO DALEVILLE, VA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–50 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location RCCI 1662 RC COMMUNICATIONS, INC(SUB ROBERTS NEW EFFINGTON, SD COUNTY) RCHC 7738 REACH COMMUNICATIONS INC. ALBANY, NY RCHE 0267 RITCHIE TEL CO HARRISVILLE, WV RCHL 0542 ROCK HILL TEL CO ROCK HILL, SC RCMD 0037 RICHMOND TEL CO RICHMOND, MA RCMS ROCHESTER COMMUNICATIONS INC NY RCNK 7618 RCN TELECOM SERVICES, INC(PREV PRINCETON, NJ RESIDENTIAL COMM) RCNP 8309 RCN TELECOM SERVICES OF PHILADELPHIA PRINCETON, NJ INC RCNX 7602 1-800-RECONEX, INC HUBBARD, OR RCPT 1942 ROCK PORT TEL CO ROCK PORT, MO RCRV 0943 ROCK RIVER TEL CO MADISON, WI RCSR 0121 ROCHESTER TEL CORP ROCHESTER, NY RCWL 1282 ROCKWELL COOP TEL ASSN ROCKWELL, IA RDCL 1277 RADCLIFFE TEL CO INC RADCLIFFE, IA RDFD 1720 REDFIELD TEL CO INC MONROE, LA RDLY 1278 READLYN TEL CO READLYN, IA RDRV 1631 RED RIVER RURAL TEL ASSN ABERCROMBIE, ND RDWD 1472 REDWOOD COUNTY TEL CO REDWOOD FALLS, MN RGGN 2202 ROGGEN TEL COOP CO ROGGEN, CO RGLD 0316 RAGLAND TEL CO INC RAGLAND, AL RGNT 0942 RICHLAND-GRANT TEL COOP INC BLUE RIVER, WI RGTC REGENT TELECOMMUNICATIONS KINGSTON, NY CORPORATION RGVL 0654 RIDGEVILLE TEL CO RIDGEVILLE CORS, OH RGWY 0541 RIDGEWAY TEL CO INC RIDGEWAY, SC RHMC 2804 RICHMOND CONNECTIONS, INC. RICHMOND, MA RHNL 0940 RHINELANDER TEL CO RHINELANDER, WI RHSY 1474 ROTHSAY TEL CO INC ROTHSAY, MN RICO 2201 RICO TEL CO RICO, CO RIDG 0540 RIDGE TEL CO INC RIDGE SPRING, SC RKDL 1473 ROCK DELL TEL CO KASSON, MN RKLD 2232 ROCKLAND TEL CO ROCKLAND, ID RMAN 2136 ROMAIN TEL CO INC GRANDVIEW, TX RMBP 0496 RANDOLPH TEL MEMBERSHIP CORP ASHEBORO, NC RMBR 1587 RODEO TEL INC BURWELL, NE RNBW 1820 RAINBOW TEL COOP ASSN INC EVEREST, KS

Proprietary — Licensed Material See proprietary restrictions on title page. 12–51 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location RNGD 0439 RINGGOLD TEL CO INC RINGGOLD, LA RNGL 0382 RINGGOLD TEL CO RINGGOLD, GA RNGS 1280 RINGSTED TEL CO RINGSTED, IA RNKI 7744 RNK, INC SHARON, MA RNLH 0495 RANDOLPH TEL CO LIBERTY, NC RNSN 1475 RUNESTONE TEL ASSN HOFFMAN, MN ROCH 0815 ROCHESTER TEL CO INC ROCHESTER, IN ROCK 1586 ROCK COUNTY TEL CO BLAIR, NE RONK 0317 ROANOKE TEL CO INC MONROE, LA RONN 2252 RONAN TEL CO RONAN, MT ROTI ROOME TELECOM INC OR ROYL 1283 ROYAL TEL CO ROYAL, IA RPDC RAPID COMMUNICATIONS INC. MORRISTOWN, NJ RRCL 9449 REMI RETAIL COMMUNICATIONS, LLC GREENSBURG, PA RSNR 1279 REASNOR MUTUAL TEL ASSN SULLY, IA RSRV 0438 RESERVE TEL CO RESERVE, LA RSVC 1826 RURAL TEL SERVICE CO INC LENORA, KS RSVL 2334 ROSEVILLE TEL CO ROSEVILLE, CA RSVN 1632 RESERVATION TEL COOP PARSHALL, ND RSVT 2272 ROOSEVELT COUNTY RURAL TEL COOP INC PORTALES, NM RSVY 2395 ROSE VALLEY TEL CO LEBANON, OR RTCC RTC COMMUNICATIONS CORP ROCHESTER, IN RTCM 3410 RT COMMUNICATIONS INC WORLAND, WY RTHV 1284 RUTHVEN TEL EXCH CO RUTHVEN, IA RTIH 2375 RTI/HALSEY TEL CO HALSEY, OR RTOC 9587 R.T.O. COMMUNICATIONS, LLC. NORFOLK, VA RURL 2233 RURAL TEL CO GLEENS FERRY, ID RVGN 2356 RIO VIRGIN TEL CO INC MESQUITE, NV RVRA 2134 RIVIERA TEL CO INC RIVIERA, TX RVSD 0943 RIVERSIDE TELECOM INC MADISON, WI RVTC 1189 RIVER VALLEY TEL COOP GRAETTINGER, IA RXBO 8232 ROXBOROUGH TEL CO LTD MOOSE CREEK, ON RYET 2203 RYE TEL CO INC COLORADO CITY, CO RYNL 1075 REYNOLDS TEL CO INC REYNOLDS, IL SACC 1285 SAC COUNTY MUTUAL TEL CO ODEBOLT, IA SACO 0022 SACO RIVER TEL & TEL CO BAR MILLS, ME SALM 0417 SALEM TEL CO SALEM, KY SANB 1478 SANBORN TEL CO MN

Proprietary — Licensed Material See proprietary restrictions on title page. 12–52 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location SATC 1829 S & A TEL CO INC ALLEN, KS SB 9417 SOUTHERN BELL ATLANTA, GA SBCN 2664 SBC TELECOM, INC (PREV SBC NATIONAL, INC) SAN ANTONIO, TX SBCS SBC ADVANCED SOLUTIONS, INC SAN ANTONIO, TX SBMS 7659 SBMS NEW YORK SERVICES, INC. ROCHESTER, NY SBSI 7844 SBMS BOSTON SERVICES, INC. WESTWOOD, MA SBTL 9250 SMART BUILDING TECHNOLOGIES LTD. ISLANDIA, NY SBTS 1680 SULLY BUTTES TEL COOP INC HIGHMORE, SD SC 9419 SOUTH CENTRAL BELL BIRMINGHAM, AL SCAT SAN CARLOS APACHE TELECOMMUNICATIONS SAN CARLOS, AZ UTILITY, INC. SCCI 1094 SOUTH CENTRAL COMMUNICATIONS, INC. PRINCETON, MO SCHL 1291 SCHALLER TEL CO SCHALLER, IA SCHR 1476 SACRED HEART TEL CO CLARA CITY, MN SCIO 2397 SCIO MUTUAL TEL CO SCIO, OR SCKS 4462 SOUTH CENTRAL TELEPHONE ASSN, INC KS MEDICINE LODGE, KS SCND 0945 SCANDINAVIA TEL CO MADISON, WI SCNN 0204 SOUTH CANAAN TEL CO SOUTH CANAAN, PA SCOK 4463 SOUTH CENTRAL TELEPHONE ASSN INC OKLA MEDICINE LODGE, KS SCTC 3031 SCOTT COUNTY TELEPHONE COMPANY VALIANT, OK SCTK 3306 SOUTH CENTRAL TELECOMM OF KIOWA, INC MEDICINE LODGE, KS SCTL 1831 SOUTH CENTRAL TEL ASSN INC MEDICINE LODGE, KS SCTN 1294 SCRANTON TEL CO SCRANTON, IA SCTR 0418 SOUTH CENTRAL RURAL TEL COOP CORP INC GLASGOW, KY SCTT 0248 SCOTT COUNTY TEL COOP INC GATE CITY, VA SCUT 2286 SOUTH CENTRAL UTAH TEL ASSN INC ESCALANTE, UT SCWD 1341 SCHUYLER TEL CO - IA WOODWARD, IA SCYR 1079 SCHUYLER TEL CO RUSHVILLE, IL SDCC 4745 2ND CENTURY COMMUNICATIONS, INC. TAMPA, FL SDHL 0499 SANDHILL TEL CO MATTHEWS, NC SDLR 2023 SHIDLER TEL CO SHIDLER, OK SDSC 8319 SPARTAN DEBT SERVICES CORP NORCROSS, GA SDTN 1590 SODTOWN TEL CO RAVENNA, NE SEGT SEGTEL, INC. HANOVER, NH SEIN 0819 SOUTHEASTERN IND RURAL TEL COOP INC DILLSBORO, IN SEMS 0461 SOUTHEAST MISSISSIPPI TEL CO LEAKESVILLE, MS SENC 1945 SENECA TEL CO SENECA, MO SENE 1591 SOUTHEAST NEBRASKA TEL CO FALLS CITY, NE

Proprietary — Licensed Material See proprietary restrictions on title page. 12–53 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location SEPB 8233 ST EPHREM INC TEL DE ST EPHREM, PQ SETI 8320 SERVICE ELECTRIC TELEPHONE, INC. COPLAY, PA SEVL 1949 STEELVILLE TEL EXCH INC STEELVILLE, MO SGRM 0122 SENECA-GORHAM TEL CORP HOLCOMB, NY SGTL 8237 SOGETEL INC HICOLET, PQ SHBR 1482 SHERBURNE COUNTY RURAL TEL CO BIG LAKE, MN SHED 8380 LOCAL DIALTONE SERVICE INC (PREV GREAT NECK, NY SHOPPERS EDGE INC SHEN SHENTEL COMMUNICATIONS COMPANY EDINBURG, VA SHHM 0064 SHOREHAM TEL CO INC SHOREHAM, VT SHLK 0948 SHELL LAKE TEL CO INC SHELL LAKE, WI SHND 0250 SHENANDOAH TEL CO EDINBURG, VA SHOC 7087 CSW/ICG CHOICE COM, L.P. AUSTIN, TX SHRN 1293 SHARON TEL CO HILLS, IA SHSY 7912 SHORTLINE SYSTEMS, INC. BALTIMORE, MD SHWD 0656 SHERWOOD MUTUAL TEL ASSN INC SHERWOOD, OH SHWS 0726 SHIAWASSEE TEL CO PERRY, MI SIBL STATEN ISLAND TELECOM, LLC STATEN ISLAND, NY SIER 2338 SIERRA TEL CO INC OAKHURST, CA SIET TELECOM ITALIA SPA ROME, IT SIPT TELECOM ITALIA SPA ROME, IT SIRN 0949 SIREN TEL CO INC SIREN, WI SITK 3020 SITKA TEL CO AK SKGT 7066 STICKDOG TELECOM, INC VIENNA, VA SKLN 0501 SKYLINE TEL MEMBERSHIP CORP WEST JEFFERSON, NC SKOW SKOWHEGAN ONLINE INCORPORATED SKOWHEGAN, ME SKSR 0257 SPRUCE KNOB SENECA ROCKS TEL CO RIVERTON, WV SKWN 8091 SASKTEL REGINA, SK SKYT 6243 SKYLAND TECHNOLOGIES, INC. HELENA, MT SLDC 0955 STATE LONG DISTANCE TEL CO ELKHORN, WI SLDE 7054 ST LONG DISTANCE, INC. SARASOTA, FL SLDG 0466 SLEDGE TEL CO INC SUNFLOWER, MS SLEY 1483 SLEEPY EYE TEL CO ADA, MN SLIB 8234 ST LIBOIRE DE BAGOT INC LE TEL DE ST LIBOIRE, PQ SLLV 0957 SULLIVAN TEL CO TOMAH, WI SLLY 1306 SULLY TEL ASSN SULLY, IA SLND 2147 SUGAR LAND TEL CO SUGAR LAND, TX SLRK 1295 SHELL ROCK TEL CO SHELL ROCK, IA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–54 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location SLST 2295 SILVER STAR TEL CO INC FREEDOM, WY, ID SLTD N/A SPRINT LTD (CLONES OWNERSHIP CODE ONLY) KANSAS CITY, MO SLTL 0203 SALTILLO TEL CO PA SMCC SMART CELLULAR AND COMMUNICATIONS, LAKEWOOD, NJ INC. SMMT 3028 SUMMIT TEL FAIRBANKS, AK SMPN 7391 SPRINT METROPOLITAN NETWORKS, INC. MAITLAND, FL SMRS 0024 SOMERSET TEL CO NORTH ANSON, ME SMRT 0951 SOMERSET TEL CO INC SOMERSET, WI SMST 3301 SOUTHEAST MISSISSIPPI TEL CO KNOXVILLE, TN SMTN 0498 SALUDA MOUNTAIN TEL CO SALUDA, NC SMTV 0467 SMITHVILLE TEL CO INC SMITHVILLE, MS SMVL 0818 SMITHVILLE TEL CO INC ELLETTSVILLE, IN SN 9147 SOUTHERN NEW ENGLAND TEL CO NEW HAVEN, CT SNCK 0725 SAND CREEK TEL CO SAND CREEK, MI SNCM 0166 SANCOM, INC. WOONSOCKET, SD SNFL 1835 SUNFLOWER TEL CO INC DODGE CITY, KS SNHL 0546 SANDHILL TEL COOP INC JEFFERSON, SC SNIP SNIP LINK, LLC BLACKWOOD, NJ SNMC 2140 SAN MARCOS TEL CO INC SAN MARCOS, TX SNMN 0825 SUNMAN TEL CO INC SUNMAN, IN SNRS 2141 SANTA ROSA TEL COOP INC VERNON, TX SNTN 1592 STANTON TEL CO INC STANTON, NE SOAR 1702 SOUTH ARKANSAS TEL CO INC HAMPTON, AR SOBC 8238 SOUTH BRUCE RURAL TEL CO LTD TEESWATER, ON SOCL 0517 SOUTH CAROLINA TEL CORP SC SOEA 0952 SOUTHEAST TEL CO OF WISCONSIN INC WATERFORD, WI SOKS 1833 SOUTHERN KANSAS TEL CO INC CLEARWATER, KS SOMT 2254 SOUTHERN MONTANA TEL CO WISDOM, MT SOON 2148 SWEENEY-OLD OCEAN TEL CO SUGAR LAND, TX SORV 1634 SOURIS RIVER TEL COMMUNICATIONS COOP MINOT, ND SOUX 1677 SIOUX VALLEY TEL CO DELL RAPIDS, SD SOWS 1301 SOUTHWEST TEL EXCH INC EMERSON, IA SPGV 1485 SPRING GROVE COOP TEL CO SPRING GROVE, MN SPKP 1655 SPLITROCK PROPERTIES INC.(SUB SPLITROCK GARRETSON, SD TELECOM) SPLN 2143 SOUTH PLAINS TEL COOP INC LUBBOCK, TX SPNT 8712 SPRINT COMMUNICATIONS COMPANY, L.P. OVERLAND PARK, KS SPPT 0728 SPRINGPORT TEL CO SPRINGPORT, MI

Proprietary — Licensed Material See proprietary restrictions on title page. 12–55 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location SPRC SPARTAN COMMUNICATIONS CORP CAMDEN, NJ SPRK 1657 SPLITROCK TELECOM COOP INC GARRETSON, SD SPRR 1307 SUPERIOR TEL COOP SUPERIOR, IA SPTC 2195 SOUTH PARK TELEPHONE COMPANY COLORADO CITY, CO SPVL 1302 SPRINGVILLE COOP TEL ASSN INC SPRINGVILLE, IA SPVY 0953 SPRING VALLEY TEL CO INC SPRING VALLEY, WI SPWC 8829 STAR POWER COMMUNICATIONS, LLC PRINCETON, NJ SRBO 1292 SEARSBORO TEL CO INC SEARSBORO, IA SRCE 1479 SCOTT RICE TEL CO PRIOR LAKE, MN SRFR 1305 STRATFORD MUTUAL TEL CO STRATFORD, IA SRON 0946 SHARON TEL CO SHARON, WI SRRY 0503 SURRY TEL MEMBERSHIP CORP DOBSON, NC SRVC 0500 SERVICE TEL CO LEESBURG, AL SRVY 800SURVEY.COM, INC. NEW YORK, NY SRWD 0465 SHERWOOD TEL CO INC MERIGOLD, MS SSDG 1679 STOCKHOLM-STRANDBURG TEL CO STOCKHOLM, SD SSKY 2339 SISKIYOU TEL CO FT JONES, CA SSLP 1298 SOUTH SLOPE COOP TEL CO INC NORWAY, IA SSPS 0950 SOLON SPRINGS TEL CO INC MILWAUKEE, MN SSTE 2024 SOONER STATE TEL CO OK SSVW 2022 SALINA-SPAVINAW TEL CO TULSA, OK SSWD 0954 STOCKBRIDGE & SHERWOOD TEL CO MADISON, WI STAC SMALL TOWN ADVANCED COMMUNICATIONS, MARBLE FALLS, TX LLC STAR 0441 STAR TEL CO INC MARINGOUIN, LA STBG 2207 STRASBURG TEL CO STRASBURG, CO STBO 0387 STATESBORO TEL CO STATESBORO, GA STCD 1742 S&T COMMUNICATIONS OF DIGHTON INC. BREWSTER, KS STCM 2283 SKYLINE TELECOM KAMAS, UT STCR 0944 ST CROIX TEL CO NEW RICHMOND, WI STCT 5620 SOUTH CENTRAL TELCOM, LLC GLASGOW, KY STDD 0386 STANDARD TEL CO CORNELIA, GA STHD 0318 SOUTHLAND TEL CO ATMORE, AL STHM 2206 STONEHAM COOP TEL CO STONEHAM, CO STIC STI COMMUNICATIONS INC. COSHOCTON, OH STIS 6236 SUPRA TELECOMMUNICATIONS & MIAMI, FL INFORMATION SYSTEMS INC STJH 2442 ST. JOHN TEL CO ST JOHN, WA STJS 0339 ST JOSEPH TEL & TEL CO PORT ST JOE, FL

Proprietary — Licensed Material See proprietary restrictions on title page. 12–56 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location STLD 1951 STOUTLAND TEL CO COLUMBIA, MO STLL 1092 STELLE TEL CO STELLE, IL STLT 1117 STATELINE TELECOMMUNICATIONS, INC(SUB- BISON, SD WEST RIVER) STMT 0543 ST MATTHEWS TEL CO ST MATTHEWS, SC STND 0025 STANDISH TEL CO STANDISH, ME STPL 2396 ST PAUL COOP TEL ASSN ST PAUL, OR STRB 1487 STARBUCK TEL CO CLARA CITY, MN STRM 0502 STAR TEL MEMBERSHIP CORP CLINTON, NC STRT STERLING TELECOM, INC. HUNTINGTON STATION, NY STST 0544 ST STEPHEN TEL CO ST STEPHEN, SC STTC 1827 S & T TEL COOP ASSN BREWSTER, KS STTE 0125 STATE TEL CO COXSACKIE, NY STVC 8241 UPTON INC LA CIE DE TEL UPTON, PQ STYN 2399 STAYTON COOP TEL CO STAYTON, OR SUBN 1676 SANBORN TEL COOP WOONSOCKET, SD SUTN 0727 SOUTHERN TEL CO MI SVGA S.V.G.A.L. INC. BELLMORE, NY SVIC 8235 ST VICTOR DE BEAUCE (SVDB) LE TEL DE SVDB, PG, CN SVLY 0206 SUGAR VALLEY TEL CO LOGANTON, PA SVRC 6136 SILVER COMMUNICATIONS INT’T SAYREVILLE, NJ SW 9533 SOUTHWESTERN BELL ST LOUIS, MO SWAR 1724 SOUTHWEST ARKANSAS TEL COOP INC TEXARKANA, AR SWET 1025 SHAWNEE TEL CO EQUALITY, IL SWOK 2025 SOUTHWEST OKLAHOMA TEL CO DUKE, OK SWSH 1304 SWISHER TEL CO SWISCHER, IA SWSN 2174 SOUTHWESTERN TEL CO SALOME, AZ SWTC 0816 S & W TEL CO INC SANDBORN, IN SWTS 0827 SWEETSER RURAL TEL CO INC SWEETSER, IN SWTT 0120 SAWTOOTH TELEPHONE, INC. MIDVALE, ID SWTX 2135 SOUTHWEST TEXAS TEL CO ROCKSPRINGS, TX SWWL 6399 SOUTHWESTCO WIRELESS, L.P. PHOENIX, AZ SWYZ 0826 SWAYZEE TEL CO INC SWAYZEE, IN SYCM 0658 SYCAMORE TEL CO SYCAMORE, OH SYGC 7869 SYNERGISTIC COMMUNICATIONS KING OF PRUSSIA, PA SYLK 0128 SYLVAN LAKE TEL CO MONROE, NY TATM 2150 TATUM TEL CO TATUM, TX TAYL 2151 TAYLOR TEL COOP INC MERKEL, TX

Proprietary — Licensed Material See proprietary restrictions on title page. 12–57 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location TCCF 5295 TELEPHONE COMPANY OF CENTRAL FLORIDA, LAKE MARY, FL INC. TCGI 7125 TELEPORT COMMUNICATIONS GROUP INC. STATEN ISLAND, NY TCML 1682 TRI-COUNTY MUTUAL TEL CO EMERY, SD TCMP 0505 TRI-COUNTY TEL MEMBERSHIP CORP BELHAVEN, NC TCNC 0084 TACONIC TEL CORP CHATHAM, NY TCNT 0830 TRI-COUNTY TEL CO INC NEW RICHMOND, IN TCNY 0960 TRI-COUNTY TEL COOP INC STRUM, WI TCOM 8093 STENTOR CANADIAN NETWORK MANAGEMENT OTTAWA, ON TCON 7748 TELECON COMMUNICATIONS CORPORATION JOHNSTOWN, NY TCSV TELECARRIER SERVICES INC CRANFORD, NJ TCTW 3411 TCT WEST, INC. BASIN, WY TCTY 2155 TRI-COUNTY TEL CO INC HUNTSVILLE, TX TCUY 1726 TRI-COUNTY TEL CO INC EVERTON, AR TCVC TECH VALLEY COMMUNICATIONS, INC ALBANY, NY TDBY 8094 THUNDER BAY THE CITY OF THUNDER BAY, ON TDST TDS TELECOMMUNICATIONS, INC. MADISON, WI TDWT TIDALWAVE TELEPHONE INC CHANTILLY, VA TEBY 8464 TELABILITY INC. EAST ISLIP, NY TECO TELESENS COMMUNICATIONS CORP. UNIONDALE, NY TEII TELECARD INTERNATIONAL, INC. JACKSON HEIGHTS, NY TELF TELECOM FUNDING, INC. LAS VEGAS, NV TENN 2446 TENINO TEL CO TENINO, WA TFES TELEFONICA NACIONAL DE ESPANA MADRID, SP TFGI THE FURST GROUP, INC. SHAMONG, NJ TFMX TELEFONOS DE MEXICO MEXICO CITY, MX TFNA TELEFONICA NACIONAL COAHUILA, MX TFNO TELEFONOS DEL NOROESTE TIJUANA,BAJA CA, MX TGBY 0419 THACKER/GRIGSBY TEL CO HINDMAN, KY TGIC TELLOGIC INCORPORATED DALLAS, TX THMT 0388 THOMASTON TEL CO GA THRN THORN COMMUNICATIONS, LLC NEW YORK, NY THRP 0959 THORP TEL CO DBA PTI COMMUNICATIONS THORP, WI THRV 1525 THREE RIVER TEL CO LYNCH, NE THTW 0828 THORNTOWN TEL CO INC THORNTOWN, IN TICC 3224 THOUSAND ISLANDS COMMUNICATIONS CLAYTON, NY COMPANY TIEC 7872 TIE/COMMUNICATIONS OVERLAND PARK, KS TJET TELJET, INC. ST. JOHNSBURY, VT

Proprietary — Licensed Material See proprietary restrictions on title page. 12–58 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location TLBC 8239 TELEBEC LIMITEE MONTREAL, PQ TLBM TELEBEAM, INCORPORATED STATE COLLEGE, PA TLCO 0578 TELLICO TEL CO INC TELLICO PLAINS, TN TLGT 8387 TELIGENT SERVICES, INC. (PREV TELIGENT, VIENNA, VA INC ) TLHC TALK.COM HOLDING CORP NEW HOPE, PA TLIN TOTALINK OF INDIANA, LLC FRANKLIN, MA TLIT TELESOFT SPA VIA DEGLI AGROSTEMMI 30 0, TLJV 7005 TELERGY JOINT VENTURE SYRACUSE, NY TLMA TOTALINK OF MASSACHUSETTS, LLC. FRANKLIN, MA TLMI TOTALINK OF MICHIGAN, LLC. FRANKLIN, MA TLMN 2342 USE EC CODE CZUC TUOLUMNE, CA TLNH 1757 TALKINGNETS HOLDINGS, LLC. WILMINGTON, NC TLNR TELEFONO NORTE LOGO TIJUANA,BAJA CA, MX TLNY TELENERGY NEWTON, MA TLOH TOTALINK OF OHIO, LLC FRANKLIN, MA TLOR TAYLOR TEL CO LTD LIONS HEAD, ON TMAX TELEMAX INTERNATIONAL CORP. BROOKLYN, NY TMBG 0131 TRUMANSBURG HOME TEL CO PHELPS, NY TMCV TMC OF VIRGINIA, INC. BETHESDA, MD TMDE TMC COMMUNICATIONS OF DELEWARE, INC. BETHESDA, MD TMTN 1308 TEMPLETON TEL CO TEMPLETON, IA TMTS 8240 TUCKERSMITH MUNICIPAL TEL SYS BAYFIELD, ON TNCD 2378 TRANS-CASCADES TEL CO ESTACADA, OR TNNS 0575 TENNESSEE TEL CO KNOXVILLE, TN TNNY 0958 TENNEY TEL CO ALMA, WI TNSP 0129 TOWNSHIP TEL CO INC CHAUMONT, NY TNWS TRANSACTION NETWORK SERVICES, INC(PREV RESTON, VA PSINET ...) TOLD 2447 TOLEDO TEL CO INC TOLEDO, WA TONC 1086 TONICA TEL CO TONICA, IL TOPP TOPP COMM, INC MIAMI, FL TOTC 2204 TETON TELECOM COMMUNICATIONS FREEDOM, WY TOUA 2173 TOHONO O’ODHAM UTILITY AUTHORITY SELLS, AZ TPHM 0068 TOPSHAM TEL CO EAST CORINTH, VT TPTN 0829 TIPTON TEL CO INC TIPTON, IN TRBS 2265 TULAROSA BASIN TELEPHONE CO.,INC. TULAROSA, NM TRCY 2296 TRI-COUNTY TEL ASSN INC BASIN, WY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–59 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location TREN 0389 TRENTON TEL CO TRENTON, GA TRIC 1839 TRI-COUNTY TEL ASSN INC COUNCIL GROVE, KS TRIL 1309 TERRIL TEL CO TERRIL, IA TRLK 0961 TURTLE LAKE TEL CO DBA PTI TURTLE LAKE, WI COMMUNICATIONS TRNG 2257 TRIANGLE TEL COOP ASSN INC HAVRE, MT TRNS MEDIA LOG INC DBA TRANSBEAM NEW YORK, NY TRNV TERRA NOVA TELECOM INC GANDER, NF TRNY 2156 TRINITY VALLEY TEL CO INC WINNIE, TX TROY 2234 TROY TEL CO INC TROY, ID TRRL 2029 TERRAL TEL CO TERRAL, OK TRRN TERRANET, INC. BOSTON, MA TRTL 8311 TRAVELERS TELECOM CORPORATION NJ TSAT 8049 TELESAT CANADA GLOUCESTER, ON TSBI TRISTATE BELL INC BROOKLYN, NY TSVC 0659 TEL SERVICE CO WAPAKONETA, OH TSWC PRISM COMM. INC (PREV TRANSWIRE NY, NY COMMUNICATIONS INC TTAH 2030 TOTAH TEL CO INC OCHELATA, OK TTCM 8490 TALK TIME COMMUNICATIONS LTD JAMAICA, NY TTCP TOTAL COMMUNICATIONS PLUS, INC. BROOKLYN, NY TTLS 8491 THE TELEPHONE CONNECTION LOCAL LOS ANGELES, CA SERVICES, LLC. TTLT 7700 COVISTA, INC (PREV TOTALTEL, INC.) LITTLE FALLS, NJ TTNK 1310 TITONKA TEL CO TITONKA, IA TTTC 3334 TABLE TOP TELEPHONE COMPANY AJO, AZ TUAK 3022 TEL UTILITIES OF ALASKA INC ANCHORAGE, AK TUCM 8328 TRUCOM CORPORATION NEW YORK, NY TUDC 2408 TEL UTILITIES OF WASHINGTON INC CHENEY, WA TUEA 2360 TEL UTILITIES OF EASTERN OREGON INC LEBANON, OR TUMW TSUNAMI NETWORKS, INC. NEW YORK, NY TUND 3030 TEL UTILITIES OF THE NORTHLAND ANCHORAGE, AK TUOR 2361 TEL UTILITIES CO OF OREGON LEBANON, OR TUWV 0271 TELEPHONE UTILITIES OF WEST VA INC WV TUWY 2299 TELEPHONE UTILITIES OF WYOMING INC VANCOUVER,WA., WY TVLN 1491 TWIN VALLEY-ULEN TEL CO INC TWIN VALLEY, MN TWCC TWC COMMUNICATIONS INC. EDISON, NJ TWCS 7430 TIME WARNER COMMUNICATIONS ENGLEWOOD, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 12–60 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location TWCT 6989 RCN TELECOM SERVICES OF ILLINOIS (PREV CHICAGO, IL 21ST CEN TWLK 0579 TWIN LAKES TEL COOP CORP GAINSBORO, TN TWNG 0731 TWINING TEL CO MI TWTT 3311 TIDEWATER TELECOM, INC. NOBLEBORO, MN TWVY 1840 TWIN VALLEY TEL INC MILTONVALE, KS TXMD 2153 TEXAS - ALLTEL INC GRANDVIEW, TX TXUC TXU COMMUNICATIONS COMPANY LUFKIN, TX TYGT 0272 TYGART VALLEY TEL CO PA UBSN 2287 UINTAH BASIN TEL ASSN INC ROOSEVELT, UT UCLS 0506 UNITED TEL CO OF THE CAROLINAS GREENWOOD, SC UCTC URBAN COMMUNICATIONS TRANSPORT NEW YORK, NY CORPORATION UDAC 4079 US DATANET CORPORATION SYRACUSE, NY UDAR 1728 UNITED TEL CO OF ARKANSAS OVERLAND PARK, KS UDFM 1316 UNITED FARMERS TEL CO EVERLY, IA UDHC U.S. DATA HIGHWAY CORPORATION PLEASANTON, CA UDIA 1317 UNITED TEL IOWA DBA UNITED TEL E KS OVERLAND PARK, KS UDIN 0832 UNITED TEL CO OF INDIANA INC WARSAW, IN UDKS 1842 UNITED TEL CO OF KANSAS OVERLAND PARK, KS UDLA 0443 UNITED TEL CO OF LOUISIANA INC MONROE, LA UDMN 1456 UNITED TEL CO OF MINNESOTA OVERLAND PARK, KS UDMO 1957 UNITED TEL CO OF MISSOURI OVERLAND PARK, KS UDNJ 0142 UNITED TEL CO OF NJ NJ UDNW 2400 UNITED TEL CO OF THE NORTHWEST HOOD RIVER, OR UDOH 0661 UNITED TEL CO OF OHIO MANSFIELD, OH UDPA 0209 UNITED TEL CO OF PENNSYLVANIA CARLISLE, PA UDTX 2084 UNITED TEL CO OF TEXAS OVERLAND PARK, KS UDWE 1595 UNITED TEL CO OF THE WEST OVERLAND PARK, KS UFLG 0341 UNITED TEL CO OF FLORIDA APOPKA, FL UHCL 7674 US LEC OF NORTH CAROLINA LLC CHARLOTTE, NC UHTS 8868 ULTIMATE HOME TELEPHONE SERVICE EAST ORANGE, NJ UIMN 0567 UNITED INTER MOUNTAIN TEL CO BRISTOL, TN UINN 0049 UNION TEL CO FARMINGTON, NH UION 1684 UNION TEL CO HARTFORD, SD UITD UNITED TEL CO OF MICHIGAN MI ULCO 2208 UNIVERSAL TEL CO OF COLORADO PAGOSA SPRINGS, CO ULSW 2175 UNIVERSAL TEL CO OF SOUTHWEST (AZ) MILWAUKEE, WI UMAD 1636 UNITED TEL MUTUAL AID CORP LANGDON, ND

Proprietary — Licensed Material See proprietary restrictions on title page. 12–61 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location UMDA URBAN MEDIA PALO ALO, CA UNAC UNIVERSAL ACCESS, INC. CHICAGO, IL UNAN 1593 UNION TEL CO NE UNCS UNLIMITED COMMUNICATIONS SERVICE LLC TRENTON, NJ UNDL 7617 UNDIAL INCORPORATED LOUISVILLE, KY UNED 0963 UNITED TELEQUIPMENT CORP MONROE, WI UNID 0581 UNITED TEL CO INC CHAPEL HILL, TN UNNM 2274 UNIVERSAL TEL CO OF SOUTHWEST(NM) ZUNI, NM UNNN 2297 UNION TEL CO MOUNTAIN VIEW, UT UNON 1727 UNION TEL CO INC MONROE, LA UNSP 0322 UNION SPRINGS TEL CO INC UNION SPRINGS, AL UNTC 6113 UNITED TELECOM, LLC GREAT NECK, NY UNTD 1841 UNITED TEL ASSN INC DODGE CITY, KS UNTL UNITEL COMMUNICATIONS INC TORONTO, ON UNTM 7484 CORECOMM NEWCO, INC DBA CORECOMM WORTHINGTON, OH (PREV USN COMMUN) UNTS 7491 UNITED TELEMANAGEMENT SERVICES NEW YORK, NY UNTW 0420 UNIONTOWN TEL CO KY UNTY 0029 UNITY TEL CO INC UNITY, ME UNWI 0956 UNIVERSAL TEL CO OF NO. WISC. INC MILWAUKEE, WI UONN 0962 UNION TEL CO PLAINFIELD, WI UPHT 4031 UPSTATE HOMETEL, L.L.C. DALLAS, TX UPNA 0732 UPPER PENINSULA TEL CO CARNEY, MI UPSL 1494 UPSALA COOP TEL ASSN UPSALA, MN URBN 0964 URBAN TEL CORP CLINTONVILLE, WI URVR 0027 UNION RIVER TEL CO AURORA, ME USAT 6110 USA TELEPHONE INC MIAMI, FL USAV UTILI SAVE, LLC FOREST HILLS, NY USAX 7761 USA EXCHANGE, LLC CHESTERFIELD, MO USBG USBG, INC. ALSIP, IL USCT US CARRIER TELECOM, LLC 4931 MERCER UNIVERSITY DR, GA USLD 7575 U.S. LONG DISTANCE, INC. SAN ANTONIO, TX USOC 7461 US ONE COMMUNICATIONS SERVICES CORP. DALLAS, TX USSX 0139 UNITED - SUSSEX TEL CO NJ USTA UNITED STATES TELECOM ASSOCIATION WASHINGTON, DC (PREV UNITED S.. USTI 8631 UNITED STATES TELECOMMUNICATIONS, INC. TAMPA, FL USWC 9639 U S WEST COMMUNICATIONS INC MINNEAPOLIS, MN

Proprietary — Licensed Material See proprietary restrictions on title page. 12–62 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location USWT 4137 US WATS, INC BENSALEM, PA USXC 7980 US XCHANGE, L.L.C. GRAND RAPIDS, MI UTED 2158 UNITED TEL CO INC TX UTEK 1810 UNITED TEL IOWA DBA UNITED TEL E KS OVERLAND PARK, KS UTEX 0821 UTEX COMMUNICATIONS CORP. AUSTIN, TX UTLC 0963 UTELCO, INC MONROE, WI UTNJ 0138 UNITED TEL CO OF NEW JERSEY CARLISLE, PA UTSE 0567 UNITED TELEPHONE - SOUTHEAST BRISTOL, TN UTSK 1812 UNITED TEL MO DBA UNITED TEL SE KS OVERLAND PARK, KS UTTI 7655 UNIVERSAL TELEPHONE & TELEGRAPH, INC. KINNELON, NJ UTWC 0390 UTELWICO INC GA UTWY 2288 UTAH-WYOMING TELECOM (UT) KAMAS, UT UUTS 3023 UNITED UTILITIES INC ANCHORAGE, AK UVLD 7622 UNIVERSAL LONG DISTANCE, INC. NEW YORK, NY UWIA 8265 US WEST INTERPRISE AMERICA, INC. DENVER, CO UYAT 9298 UNITED SYSTEMS ACCESS TELECOM, INC. KENNEBUNK, ME UYOO UTILITY SOLUTIONS ROCHESTER, NY VALE 0324 VALLEY TEL CO INC LEEDS, AL VALY 1495 VALLEY TEL CO PARKERS PRAIRIE, MN VANL 0662 VANLUE TEL CO VANLUE, OH VCOM VCOM.COM CORP NEW YORK, NY VCSC 1665 VALLEY CABLE & SATELLITE COM. INC(SUB- HERREID, SD VALLEY TELE) VCTC VOICETEL COMMUNICATIONS INC. WEST ORANGE, NJ VENS 0210 VENUS TEL CORP VENUS, PA VERN 0133 VERNON TEL CO INC VERNON, NY VFCI VF COMMUNICATIONS, iNC. NORFOLK, VA VGTB 8346 VDL INC. DBA GLOBAL TELECOM BROKERS OWINGS MILLS, MD VGVL 0663 VAUGHNSVILLE TEL CO INC VAUGHNSVILLE, OH VHSS 0253 VIRGINIA TEL CO HOT SPRINGS, VA VIOL 1087 VIOLA HOME TEL CO VIOLA, IL VIRQ 0967 VIROQUA TEL CO VIROQUA, WI VIST 1127 VISTA TELEPHONE COMPANY OF IOWA FORT DODGE, IA VITS 7990 VITTS MANCHESTER, NH VIVN 1686 VIVIAN TEL CO VIVIAN, SD VLCT 8242 VALCOURT ASSN COOP DE TEL DE VALCOURT, PQ VLDR 0965 VALDERS TEL CO VALDERS, WI VLEY 2298 VALLEY TEL CO BAGGS, WY

Proprietary — Licensed Material See proprietary restrictions on title page. 12–63 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location VLGC VIATEL GLOBAL COMMUNICATIONS INC 200 COTTONTAIL LANE, SOME, NJ VLLE 1685 VALLEY TELECOM COOP ASSN INC HERREID, SD VLLY 3309 VALLEY TELECOMMUNCIATIONS, INC SCOBEY, MT VLNT 2032 VALLIANT TEL CO VALLIANT, OK VLSC 1324 VILLISCA FARMERS TEL CO VILLISCA, IA VLTC VALLEY TELECOMMUNICATIONS COMPANY WILLCOX, AZ VLTS VALOR TELECOMMUNICATIONS SOUTHWEST, IRVING, TX LLC VNBR 1319 VAN BUREN TEL CO INC KEOSAUQUA, IA VNHR 1320 VAN HORNE COOP TEL CO VAN HORNE, IA VNIS 3300 VIRGIN ISLANDS TELEPHONE CORP ST THOMAS, VI VNRC 0164 VENTURE COMMUNICATIONS, INC(SUB SULLY HIGHMORE, SD BUTTES) VNTR 1322 VENTURA TEL CO INC VENTURA, IA VOLC 2343 VOLCANO TEL CO PINE GROVE, CA VRDC VIC-RMTS-DC, L.L.C. BANNOCKBURN, IL VRMT 3332 VERMONT TELEPHONE COMPANY, INC. SPRINGFIELD, VT VRNN 0966 VERNON TEL COOP WESTBY, WI VRRL 2258 VALLEY RURAL TEL COOP ASSN INC GLASGOW, MT VRTT 5167 VARTEC TELECOM, INC. DALLAS, TX VSIC 7806 VISTA INTERNATIONAL COMMUNICATIONS, MT. ARLINGTON, NJ INC. VSTA 1367 VISTA TELEPHONE COMPANY OF MINNESOTA BURNSVILLE, MN VSUD 0330 VISTA-UNITED TELECOMMUNICATIONS SYS LAKE BUENA VISTA, FL VTCM VITCOM CORPORATION NEW YORK, NY VTTC VAST-TEL COMMUNICATIONS, INC BRIDGEPORT, TX VVEW 2160 VALLEY VIEW TEL CO MUENSTER, TX VVLE 2176 VALLEY TEL COOP INC WILLCOX, AZ VVLY 2159 VALLEY TEL COOP INC RAYMONDVILLE, TX VZDR CODETEL, C POR A MIAMI, FL WAMG 1845 WAMEGO TEL CO INC WAMEGO, KS WANI WIRELESS ACCESS NETWORK, INC. FORT MYERS, FL WANT 1597 WAUNETA TELEPHONE COMPANY, DBA WAUNETA, NE BWTELCOM WARN 0031 WARREN TEL CO WARREN, ME WART 0276 WAR TEL CO BAY SPRINGS, MS WAUN 0968 WAUNAKEE TEL CO MADISON, WI WBRN 1330 WEST BRANCH TEL CO IA

Proprietary — Licensed Material See proprietary restrictions on title page. 12–64 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location WBSH 1088 WABASH TEL COOP INC LOUISVILLE, IL WBST 1963 WEBSTER COUNTY TEL CO MO WCCI 7822 WORLDCALL COMMUNICATIONS YONKERS, NY INTERNATIONAL, INC. WCCL 5872 WEST CAROLINA COMMUNICATIONS, LLC. ABBEVILLE, SC WCKS 1732 WICKES TEL CO INC OK WCLN 1328 WEBSTER-CALHOUN COOP TEL ASSN GOWRIE, IA WCTA 8788 WESTCOAST ASSOCIATES INC RAHWAY, NJ WCTL 1501 WEST CENTRAL TEL ASSN SEBEKA, MN WCTS 0136 WESTERN COUNTIES TEL CORP NY WDBY 2454 WOODBURY TEL CO WOODBURY, CT WDCY 0974 WOOD COUNTY TEL CO WISCONSIN RAPIDS, WI WDHU 1091 WOODHULL COMMUNITY TEL CO WOODHULL, IL WDKP 6915 WINDKEEPER COMMUNICATIONS, INC. VIENA, VA WDNS 1327 WEBB-DICKENS TEL CORP SLOUX CENTER, IA WDRN 0734 WALDRON TEL CO WALDRON, MI WDST 1510 WOODSTOCK TEL CO FRANKLIN, MN WDWR 1341 WOODWARD MUTUAL TEL CO IA WECC WE CONNECT COMMUNICATIONS, INC. PITTSBURGH, PA WECN 0509 WESTERN CAROLINA TEL CO NC WECR 0550 WEST CAROLINA RURAL TEL COOP INC ABBEVILLE, SC WECT 2344 WEST COAST TEL CO OF CALIFORNIA EVERETT, WA WEIA 1334 WESTERN IOWA TEL ASSN LAWTON, IA WEKY 0421 WEST KENTUCKY RURAL TEL MAYFIELD, KY WELC 0394 WILKES TEL & ELEC CO INC WASHINGTON, GA WETN 0583 WEST TENNESSEE TEL CO INC BRADFORD, TN WETX 2166 WEST TEXAS RURAL TEL COOP INC HEREFORD, TX WEVA 0278 WEST VIRGINIA TEL CO WV WEWI 0971 WEST WISCONSIN TEL COOP INC DOWNSVILLE, WI WFSN 0069 WAITSFIELD/FAYSTON TEL CO WAITSFIELD, VT WGNS 2209 WIGGINS TEL ASSN WIGGINS, CO WHBY 2452 WHIDBEY TEL CO LANGLEY, WA WHCR 0834 WASHINGTON COUNTY RURAL TEL COOP INC PEKIN, IN WHTR 3024 WHITTIER TEL CO AK WINL WISCONSIN INDEPENDENT NETWORK, LLC. EAU CLAIRE, WI WINN 0737 WINN TEL CO WINN, MI WISE 2051 WISE COUNTY TEL CO TX WJRS 0143 WEST JERSEY TEL CO NJ

Proprietary — Licensed Material See proprietary restrictions on title page. 12–65 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location WKAS 7493 WORKING ASSETS SAN FRANCISCO, CA WKRM 1505 WIKSTROM TEL CO INC KARLSTAD, MN WKSN 0395 WILKINSON COUNTY TEL CO INC IRWINTON, GA WLBT 1332 WEST LIBERTY TEL CO WEST LIBERTY, IA WLFR 1325 WALLINGFORD TEL COOP IA WLHL 1729 WALNUT HILL TEL CO LEWISVILLE, AR WLKR 0391 WALKER COUNTY TEL CO LAFAYETTE, GA WLMN 1329 WELLMAN COOP TEL ASSN WELLMAN, IA WLNG 1964 WHEELING TEL EXCH BRECKENRIDGE, MO WLNI WILLIAMS LOCAL NETWORK, INC. TULSA, OK WLNT 1326 WALNUT TEL CO WALNUT, IA WLRD 2210 WILLARD TELEPHONE CO MERINO, CO WLSK 1342 WOOLSTOCK MUTUAL TEL ASSN WOOLSTOCK, IA WLSN 1849 WILSON TEL CO INC WILSON, KS WLST 0551 WILLISTON TEL CO WILLISTON, SC WLTN 1336 WILTON TEL CO WILTON, IA WLTO 0050 WILTON TEL CO WILTON, NH WLVR 0738 WOLVERINE TEL CO MILLINGTON, MI WMBP 0510 WILKES TEL MEMBERSHIP CORP WILKESBORO, NC WMNG 2299 WYOMING TEL CO INC PINEDALE, WY WMTL 0664 WABASH MUTUAL TEL CO CELINA, OH WNIS 7863 WORLD NETWORK INTERNATIONAL SERVICES, PLAINVIEW, NY INC. WNNB 1337 WINNEBAGO COOP TEL ASSN LAKE MILLS, IA WNNM 2268 WESTERN NEW MEXICO TEL CO INC SLIVER CITY, NM WNPK 0343 WINTER PARK TEL CO FL WNST 1507 WINSTED TEL CO WINSTED, MN WNTH 1508 WINTHROP TEL CO FRANKLIN, MN WNTL 3531 WANTEL, INC. ROSEBURG, OR WNTV 2323 WINTERHAVEN TELEPHONE COMPANY ANDERSON, CA WODN WORLDNET, L.L.C LAWRENCE, KS WOTC WORLDLINK TECHNOLOGIES, L.L.C PARSIPPANY, NJ WPHL 0735 WESTPHALIA TEL CO WESTPHALIA, MI WPTH 0034 WEST PENOBSCOT TEL & TEL CO CORINNA, ME WRIS WORLD-LINK SOLUTIONS, INC. NEW YORK, NY WRMA 1637 WEST RIVER MUTUAL AID TEL CORP HAZEN, ND WRRN 2162 WARREN TEL CO TX WRSE 0666 WESTERN RESERVE TEL CO HUDSON, OH

Proprietary — Licensed Material See proprietary restrictions on title page. 12–66 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location WRTC 1637 WEST RIVER TELECOMMUNICATIONS COOP HAZEN, ND WRWD 2163 WATERWOOD COMMUNICATIONS INC HUNTSVILLE, TX WRWK 8243 WARWICK LA CIE DE TEL DE WARWICK, PQ WSCO 0508 WESICO TEL CO NC WSDE 0277 WEST SIDE TEL CO MORGANTOWN, WV WSFR 0213 USE EC CODE ADNY JAMESTOWN, NY WSIA 1331 WEST IOWA TEL CO REMSEN, IA WSMN WESTELCOM NETWORK, INC. WESTPORT, NY WSPN 0837 WEST POINT TEL CO INC WEST POINT, IN WSPT 8244 WESTPORT TEL CO WESTPORT, ON WSRV 1689 WEST RIVER COOP TEL CO BISON, SD WSSD 1335 WESTSIDE INDEP TEL CO WESTSIDE, IA WSTE 1847 WHEAT STATE TEL CO INC UDALL, KS WSTI 7542 WINSTAR TELECOMMUNICATIONS, INC. TYSONS CORNER, VA WSTL 0117 WESTEL, INC. ALBION, ID WSTR 1502 WESTERN TEL CO SPRINGFIELD, MN WSVC 0833 WADESVILLE TEL CO INC WADESVILLE, IN WT 9327 WISCONSIN BELL MILWAWKEE, WI WTHM 8245 WIGHTMAN TEL LTD CLIFFORD, ON WTNB 0973 WITTENBERG TEL CO WITTENBERG, WI WTRN 1688 WESTERN TEL CO FAULKTON, SD WTXS 2168 WES-TEX TELEPHONE COOP INC STANTON, TX WVRL 0392 WAVERLY HALL TEL CO INC WAVERLY HALL, GA WVTN 1509 WOLVERTON TEL CO WOLVERTON, MN WWCY 2451 WESTERN WAHKIAKUM COUNTY TEL CO GRAYS RIVER, WA WWKV 4967 WARWICK VALLEY TEL CO WARWICK, NY WWTC 0971 WEST WISCONSIN TELECOM COOP INC DOWNSVILLE, WI WWTT WORLD WIDE TELE-TRANS COMPANY BENTONVILLE, AR WYKF 1514 WYKOFF TEL CO MN WYND 2034 WYANDOTTE TEL CO MARION, LA WYNG 1343 WYOMING MUTUAL TEL CO WYOMING, IA WYSD 0970 WAYSIDE TEL CO GREENLEAF, WI XCTG 7558 XCOM TECHNOLOGIES INC. CAMBRIDGE, MA XDSL 4714 XDSL NETWORKS, INC. BALTIMORE, MD XRRL 2170 XIT RURAL TEL COOP INC DALHART, TX XTEL 9739 XTEL COMMUNICATIONS, INC. MARLTON, NJ YATS 1093 YATES CITY TEL CO YATES CITY, IL YELL 1734 YELL COUNTY TEL CO INC DANVILLE, AR

Proprietary — Licensed Material See proprietary restrictions on title page. 12–67 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Exchange Carrier Codes Sorted by Company Code

Table 12-1 Exchange Carrier Codes Sorted by Company Code (Continued)

Alpha Numeric Company Name Headquarters Location YELM 2453 YELM TEL CO YELM, WA YEMN 0839 YEOMAN TEL CO INC YEOMAN, IN YFCC 4889 YOUR FIRST CHOICE COMMUNICATIONS, INC. QUINCY, MA YKON YUKON TEL SYNDICATED LTD DAWSON, YT YLCT 1733 YELCOT TELEPHONE COMPANY MOUNTAIN HOME, AR YORK 1638 YORK TEL CO STANLEY, ND YPST 5319 YIPES TRANSMISSION, INC. SAN FRANCISCO, CA YRVL 0584 YORKVILLE TEL COOP YORKVILLE, TN YUKN 3025 YUKON TEL CO INC ANCHORAGE, AK YUMS 0511 YADKIN VALLEY TEL MEMBERSHIP CORP YADKINVILLE, NC YWLZ 0215 YUKON-WALTZ TEL CO YUKON, PA ZEND 1852 ZENDA TEL CO INC ZENDA, KS ZMBR 1515 ZUMBROTA TEL CO CLARA CITY, MN ZNCI 5452 ZEPHION NETWORKS COMMUNICATIONS, INC. FALLS CHURCH, VA ZNCM ZONICOM, INC. PHOENIX, AZ

Proprietary — Licensed Material See proprietary restrictions on title page. 12–68 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Consolidated EC Codes Sorted by Code

13 Consolidated EC Codes Sorted by Code Table 13-1 Consolidated EC Codes Sorted by Code

Code Company Name/Reference Previous Name(s) ADTN USE EC CODE CZUC CITIZENS TELECOM CO OF VOL STATE LLC (PREV ALLTEL TENNESSEE INC) CLWT USE EC CODE CZUC CITIZENS TEL CO WHITE MTNS,INC (PREV TELECOMMUNICATIONS CO OF THE WHITE MOUNTAINS INC) ( PREV CONTEL OF THE WEST DBA GTE WS) CLWV USE EC CODE CZUC CITIZENS TELECOMM CO OF WV (PREV CONTEL OF WEST VIRGINIA DBA GTE WV) CPNL USE EC CODE CZUC CITIZENS TEL CO OF GOLDEN STATE(PREV TELECOMM CO OF THE GOLDEN STATE) (PREV CP NATIONAL CORP) CTCI USE EC CODE CZUC CITIZENS TELECOMM CO OF IDAHO (PREV GTE NORTHWEST INC) CTCT USE EC CODE CZUC CITIZENS TELECOMM CO OF TENN,LLC (PREV GTE SOUTH, INC) CTCU USE EC CODE CZUC CITIZENS TELECOMM CO OF UTAH (PREV CONTEL OF THE WEST, INC) CTMN USE EC CODE CZUC CITIZENS TELECOMM CO OF MONTANA (PREV GTE NORTHWEST INC) CTNE USE EC CODE CZUC CITIZENS TELECOM CO OF NEB. (PREV CITIZENS TELECOMMUNICATIONS COMPANY OF NEBRASKA) (PREV GTE NORTH INC NEBRASKA) CTZT USE EC CODE CZUC CITIZENS TELECOM CO OF OREGON (PREV CITIZENS TELECOM) CTZU USE EC CODE CZUC CITIZENS UTILITIES RURAL CO INC CUCA USE EC CODE CZUC CITIZENS TELCOM CO OF CALIF INC (PREV CITIZENS UTILITIES COMPANY OF CALIFORNIA) CUNY USE EC CODE CZUC CITIZENS TELECOMM CO OF NY INC (PREV CONTEL OF NY INC DBA GETE NY) CZIL USE EC CODE CZUC CITIZENS TELECOMMUNICATIONS COMPANY OF ILLINOIS MSTT USE EC CODE ADNY MIDSTATE TEL CO MTNS USE EC CODE CZUC CITIZENS MOUNTAIN STATE TEL (PREV MOUNTAIN STATE TELEPHONE COMPANY) NAVJ USE EC CODE CZUC NAVAJO COMMUNICATIONS CO,INC NEVD USE EC CODE CZUC CITIZENS TELCOMM CO OF NEV (PREV ALLTEL NEVADA INC) TLMN USE EC CODE CZUC CITIZENS TELECOMM CO OF TUOLUMNE (PREV TUOLUMNE TELEPHONE COMPANY) WSFR USE EC CODE ADNY WESTFORD INDEPENDENT TEL CO

Proprietary — Licensed Material See proprietary restrictions on title page. 13–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Consolidated EC Codes Sorted by Code

Proprietary — Licensed Material See proprietary restrictions on title page. 13–2 BR-751-100-112 Issue 4, April 2002 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Company Codes - Telcordia and Regional Holding Companies

Company Codes - Telcordia and Regional Holding 14Companies

Table 14-1 Company Codes - Telcordia and Regional Holding Companies

Company Name Code Headquarters Location Ameritech AM Chicago, IL Bell Atlantic BA Philadelphia, PA BellSouth Corporation BS Atlantic, GA NYNEX NX New York, NY Pacific Telesis Group PC San Francisco, CA Southwestern Bell SH St. Louis, MO Telcordia Technologies BR New Jersey U S West UW Englewood, CO

Proprietary — Licensed Material See proprietary restrictions on title page. 14–1 BR-751-100-112 TSP IAC Codes, EC Names, Company Codes−Telcordia and Regions Issue 4, April 2002 Company Codes - Telcordia and Regional Holding Companies

Proprietary — Licensed Material See proprietary restrictions on title page. 14–2